LIFE SCIENCE AND SUSTAINABLE DEVELOPMENT <h2>About the Journal</h2> <p><strong style="box-sizing: border-box; color: #333333;">Life Science and Sustainable Development</strong><span style="color: #333333;"> is an Open Access Journal owned by Lovrin Agricultural Research and Development Station, which offers support for quick publication of original and review articles in extenso and summary.</span></p> <p>Our Journal, <strong>Life Science and Sustainable Development</strong> includes original papers (abstract and full text) and reviews on Agriculture in general from all around the world.</p> <p>Abbreviation: LSSD</p> <p>ISSN 2734 - 5068</p> <p>ISSN-L 2734 - 5068</p> <p>Country of Publication: Romania</p> <p>Publisher: Lovrin, Romania</p> <p>Language: English</p> <p>Number of issues/year: 2</p> <p>Papers will be published in the <strong>Life Science and Sustainable Development</strong> in electronic format.</p> <p> </p> Lovrin Agricultural Research and Development Station en-US LIFE SCIENCE AND SUSTAINABLE DEVELOPMENT 2734-5068 A NEW DISEASE PROBLEM INDUCED BY CHANGING CLIMATE IN WESTERN ROMANIA <p><em>The paper presents results regarding the new winter wheat disease present with great intensity in the north-west Romania during the year 2020. In the climatically changing context, viruses of poaceae affected with intensity the wheat, with a severe reduction of yield. The paper presents the symptoms of bydv during of the phenological stage: yellowing of leave, margins shading leaves, purple leaf coloration, blackened of plant. An unusual positive correlation was point out between purple leaf coloration, caused by virus, and percent of total protein content. some genotypes (Bogdana, Ursita, and Abundent) seems to have some resistance to virus. The best entries have either Otilia or the line f.00628g34 (derived from a triticale/wheat cross), or both in their pedigrees.</em></p> Gheorghe BUNTA Corina COSMA Copyright (c) 2022 LIFE SCIENCE AND SUSTAINABLE DEVELOPMENT 2022-07-29 2022-07-29 3 1 1 12 RESEARCH ON THE EVALUATION OF TUBER YIELD COMPONENTS IN SOME POTATO VARIETIES (Solanum tuberosum L.) UNDER THE CONDITIONS OF AGRICULTURAL RESEARCH AND DEVELOPMENT STATION FROM LOVRIN, ROMANIA <p><em>Potato (Solanum tuberosum </em>L.<em>) is considered "the second bread of the country" due to the use of tubers in a wide range of foods and in the production of potato flakes, chips, and flour. It is also an important raw material for the alcohol, starch, glucose, dextrin etc. industry</em><em>. The biological material used in the research consisted in 14 Romanian potato varieties developed in laboratories specialized in this species, namely: the National Institute of Research and Development for Potato and Sugar Beet from Braşov (cv. 'Asinaria', 'Cezarina', 'Sevastia', 'Brașovia', 'Castrum', 'Marvis', 'Sarmis' and 'Ervant'), and the Potato Research and Development Station from Târgu-Secuiesc (cv. 'Albioana', 'Armonia', 'Nemere', 'Productiv', 'Redsec' and 'Gared').</em> <em>Experimental potato varieties were included in a monofactorial comparative culture, according to the four-replication randomized block method. The area of the experimental parcel was determined by the number of plants (200 plants / variant) and planting scheme. Thus, the number of plants per area unit was depended on the maturity group, namely: midlle early varieties (47,600 plants / ha; 0.70 m between rows x 0.30 m between plants / row), midlle late varieties (40,800 plants / ha; 0.70 m between rows x 0.35 m between plants / row) and late varieties (35,700 plants / ha; 0.70 m between rows x 0.40 m between plants / row).</em> <em>From the comparative analysis of morphological characters (number of tubers / hills) and yield (average tuber weight, yield per hill and area unit) one can highlight the following genotypes depending on maturity group, namely: midlle early Asinaria variety, and midlle late 'Albioana', 'Braşovia', 'Productiv', and 'Sarmis' potato varieties. Taking into account the costs of potato culture and the production price for consumption potatoes in pedo-climatic conditions in western Romania, efficient productions of over 45 t/ha (yield/ha of tubers φ &gt; 55 mm) are required.</em></p> Gheorghe POȘTA Nicolae Marinel HORABLAGA Icoana SOAMEȘ Ciprian Călin BUZNA Petru RAIN Copyright (c) 2022 LIFE SCIENCE AND SUSTAINABLE DEVELOPMENT 2022-07-29 2022-07-29 3 1 13 23 RESEARCH ON THE INFLUENCE OF SOME TECHNOLOGICAL FACTORS ON CASTOR (RICINUS COMMUNIS L.) YIELD UNDER THE CONDITIONS OF THE CENTER OF MOLDOVA <p><em>In the past, castor was grown in our country on large areas, but today there are few who have heard of this plant and far fewer who rely on the establishment of a castor crop in the field. The experience was placed at Society Agricola Moldoveni from Neamt County, and the preliminary results obtained are the object of study of the doctoral thesis. The average productions obtained in 2021 were directly influenced by the experienced technological factors. The highest seed production was made at the earliest variety, Teleorman sown in the second epoch at the distance of 70 cm between rows (1669 kg / ha). The correlation between the three studied factors (variety, epoch of sowing and distance between rows) and the yield obtained was directly and very close.</em></p> Bogdan MÎRZAN Teodor ROBU Oana MÎRZAN Margareta NAIE Copyright (c) 2022 LIFE SCIENCE AND SUSTAINABLE DEVELOPMENT 2022-07-29 2022-07-29 3 1 24 30 CHARACTERIZATION OF SOME AGRICULTURAL LANDS BASED ON AGROCHEMICAL INDICES. CASE STUDY IN THE AREA OF CENEI LOCALITY <p><em>The study evaluated the fertility and spatial variability of some agricultural lands, in the area of Cenei locality, Timis county, Romania. The soil samples, representative for the studied agricultural lands, were taken from nine different locations. The soil reaction (pH, H<sub>2</sub>O), total nitrogen content (Nt), mobile potassium content (K, ppm) were considered and studied, and the degree of saturation in basic cations (V,%) was calculated. The soil reaction showed values between pH = 6.29 - 7.97 ±0.20, the degree of saturation in basic cations (V,%) had values between V = 74.80 - 100.00 ±3.13%, total nitrogen showed values between Nt = 0.11 - 0.35 ±0.03%, and the potassium content showed values between K = 275 - 390 ±15.49 ppm. High variability was recorded in the Nt index values (CV<sub>Nt</sub> = 38.3598) and low variability in the soil reaction (CV<sub>pH</sub> = 8.3248). For the other soil indices studied, intermediate values were recorded, respectively CV<sub>V</sub> = 9.9760 for the degree of saturation in basic cations (V%), and CV<sub>K</sub> = 13.7177 in the case of mobile potassium content (Kmobil). The variation of the mobile K content in relation to the soil reaction (pH) was described by a polynomial equation of degree 2, equation (1), in statistical safety conditions, at the level of R<sup>2</sup> = 0.779, p = 0.0121. Under PCA, PC1 explained 69.593% of variance, and PC2 explained 25.919% of variance. Cluster analysis facilitated the grouping of soil samples into two separate clusters, with three sub-clusters, under Coph. coeff. = 0.859.</em></p> Alina AGAPIE Marinel Nicolae HORABLAGA Cristian Bostan Florin SALA Copyright (c) 2022 LIFE SCIENCE AND SUSTAINABLE DEVELOPMENT 2022-07-29 2022-07-29 3 1 31 36 SOIL CHARACTERIZATION BASED ON THE AGROCHEMICAL INDICES IN AGRICULTURAL AND FOREST LAND CONDITIONS <p><em>The study comparatively analyzed the variability of some agrochemical indices related to agricultural and forest land, in the area of the </em><em>“</em><em>Cenad Forest Protected Area”, Timis County, Romania. Within the agrochemical indices, the soil reaction (pH), total nitrogen content (TN %), phosphorus content (P, ppm), potassium content (K, ppm), calcium content (Ca, ppm) and magnesium content (Mg, ppm) were determined. The ANOVA test confirmed the presence of the variance and the statistical safety of the data (F&gt; Fcrit, p &lt;0.001; Alpha = 0.001). The correlation analysis showed some correlations and their statistical significance between TN and pH (r = -0.993<sup>**</sup>), between K and pH (r = -0.963<sup>*</sup>), between Ca and pH (r = 0.963<sup>*</sup>), and between K and TN (r = 0.974<sup>*</sup>)</em><em>. The variation of the mineral elements was described by polynomial equations, in different conditions of statistical safety: TN variation in relation to the soil reaction (pH) in conditions of R<sup>2</sup> = 0.986, p = 0.117; variation of potassium (K) in relation to the soil reaction (pH) under conditions of R<sup>2</sup> = 0.993, p = 0.080; variation of calcium (Ca) in relation to soil reaction (pH) under conditions of R<sup>2</sup> = 0.978, p = 0.147; variation K in relation to TN under conditions of R<sup>2</sup> = 0.997, p = 0.0531.</em><em> Based on the coefficient of variation, the agrochemical indices presented differentiated values, CV<sub>TN</sub> = 50.4183, CV<sub>Ca</sub> = 40.0339, CV<sub>K</sub> = 22.9719, CV<sub>P</sub> = 21.9803, CV<sub>Mg</sub> = 12.0496, CV<sub>pH</sub> = 3.1064. In the PCA, correlation matrix, PC1 explained 71.422% of variance, and PC2 applied 26.357% of variance. The regression analysis evaluated the variation of P in relation to the soil pH and the Ca content, respectively the Mg content and found models in the form of equations, as well as 3D graphic and in the form of isoquants models. From the analysis of the 3D models of variation of P in relation to the considered indices, it was found differentiated situations, respectively the decrease of the P availability in relation to Ca and the increase of the P availability in relation to Mg, at the same pH range.</em></p> Simona ROSU Florin SALA Copyright (c) 2022 LIFE SCIENCE AND SUSTAINABLE DEVELOPMENT 2022-07-29 2022-07-29 3 1 37 44 INFLUENCE OF AGRICULTURAL SYSTEM ON THE CONTROL OF BROMUS TECTORUM ON WINTER WHEAT <p><em>Bromus tectorum causes special problems because of its ability to reproduce through seeds and also because it’s relative tolerance to numerous herbicides. Extending new tillage systems, conservative systems specific to conservative sustainable agriculture, is a difficult task to accomplish under the circumstances of strong monocotyledonous weed infested Bromus tectorum is one of the most dangerous monocotyledonous weeds when applying unconventional system. A research was conducted in the pedoclimate condition of Agricultural Research and Development Station Turda, investigating the control of Bromus tectorum by conservative tillage. The goal was to determine the relationship between agricultural system and weeding degree on winter wheat. The use of minimum tillage and no tillage systems, caused at the end of a three year crop rotation, the increase of the Bromus tectorum pervasion in two systems, MD and NT. The occurrence of B. tectorum it is caused mainly due to the fact that the seeds are located in the first cm of the soil. Total weed density was significantly lower under the conventional tillage system (CS) and minim-chisel (MC) than under the minimum tillage-disk (MD) and no till (NT) system. The main benefit of the conventional tillage (CS) is a highly important decline of weeds.</em></p> Felicia CHEȚAN Carmen CALISTRU Copyright (c) 2022 LIFE SCIENCE AND SUSTAINABLE DEVELOPMENT 2022-07-29 2022-07-29 3 1 45 51 ASSESSMENT OF GRAIN YIELD STABILITY AND RELIABILITY IN SOME WINTER WHEAT VARIETIES <p><em>Considering the continued and unpredictable variation of climatic condition, the yield stability has become an important topic in wheat breeding. This study evaluated the grain yield of 11 winter wheat varieties with different genetic and ecologic origin during three years, to compare&nbsp; the effects of genotype, year and genotype × year interactions and to determine their stability and reliability for cultivar recommendations. The climatic conditions during the three years had the highest contribution (80.03%) to the yield variability of wheat, while the varieties had a lower influence (11.41%), and the variety x year interaction contributed only with 8.56% to the total variation. In 2020, the climatic conditions were significantly more favorable than in 2018–2019, allowing obtaining yield increases of 33.82-44.20%. Also, in 2018 there was a higher favorability of the growing conditions compared to that of 2019, associated with significant yield increases of 7.75%. The highest yield stability was observed in Boema and Galio varieties, on the background of a non-crossover genotype x environment (GE) interaction. The stability of these varieties has been associated with different yield levels, above the experience mean in Galio and below the experience mean in Boema, respectively. In Akteur and Josef varieties, the yield was strongly influenced by the GE interaction, being associated with lower levels than the experience mean. On the background of high occurrence probabilities (0.75–0.95) of unfavorable environmental conditions for wheat crop, Galio and Laurenzio varieties would have the highest yield reliability, associated with values of 5173–6328 kg/ha (Galio) and 5101–5979 kg/ha (Laurenzio). As such, given the results of all stability parameters, it turns out that the Romanian varieties showed a good adaptation to the local ecological conditions compared to most of the foreign varieties.</em></p> Gabriela GORINOIU Karina SUHAI Alina Ruja Giancarla VELICEVICI Cerasela PETOLESCU Copyright (c) 2022 LIFE SCIENCE AND SUSTAINABLE DEVELOPMENT 2022-07-29 2022-07-29 3 1 52 59 REMOTE SENSING FOR DESCRIBING VEGETATION DYNAMICS UNDER AGRICULTURAL LAND CONDITIONS <p><em>The study was based on remote sensing to obtain satellite images, spectral information and on calculating specific indices in order to describe the dynamics of crop vegetation in the case of an agricultural area. The research was carried out within the Didactic and Experimental Station of BUASVM Timisoara, Timis County, Romania. The agricultural perimeter under study is located within the Western Plain, Romania, with the general characteristics of a chernozem type soil and the climatic specificity of the area. The study interval was January - November 2021, in which 8 sets of satellite images were taken: 2.01.2021 (D1); 25.02.2021 (D2); 13.03.2021 (D3); 15.05.2021 (D4); 26.06.2021 (5); 14.08.2021 (D6); 6.09.2021 (D7) and 10.11.2021 (D8). The images were analyzed and based on spectral information the indices NDWI, NDVI, MSAVI and MTVI2 were calculated. The ANOVA test, single factor, confirmed the presence of the variance and the statistical security of the data. The NDVI index </em><em>(CV<sub>NDVI</sub>=32.1113) showed high variability, followed by the MSAVI index (CV<sub>MSAVI</sub>=20.4953) and the MTVI2 index (CV<sub>MTVI2</sub>=5.5512). Very strong correlations were recorded between NDVI and NDWI&nbsp; (-0.971<sup>***</sup>), between NDVI and MSAVI (0.994<sup>***</sup>), and between MSAVI and NDWI (-0.957<sup>***</sup>). The NDVI variation was described by a linear equation in relation to NDWI under conditions of R<sup>2</sup>=0.943, p&lt;0.001, F=98.734 and by a polynomial equation of 2nd degree in relation to MSAVI(R2=0.998, p&lt;0.001, F=1384). A spline model was found to describe the NDVI variation over time (T, days) over the study period, under conditions of statistical accuracy ( ). Within PCA, PC1 explained 76,693% of variance, while PC2 explained 23,174% of variance. The cluster analysis grouped the variables (D1 to D8) on the basis of similarity, in relation to the studied indices, in statistical accuracy conditions (Coph.corr=0.912).</em></p> Mihai HERBEI Florin SALA Copyright (c) 2022 LIFE SCIENCE AND SUSTAINABLE DEVELOPMENT 2022-07-29 2022-07-29 3 1 60 69 A PHYSICAL-GEOGRAPHICAL ANALYSIS OF THE TIMIŞ PLAIN GRASSLANDS AND IDENTIFICATION OF VULNERABILITIES <p><em>Grasslands, located in different physical and geographical conditions, can be affected by a number of natural factors such as: arid climate, catastrophic floods, permanent or temporary excess moisture, soil erosion, acidification, salting, invasion of valuable grassy and woody vegetation, water imbalance, pollution and more. In this context, the purpose of the research is to identify the vulnerabilities of the grasslands in the plain area, based on ecological factors: landform, geology, climate, soil, with influence on the vegetation</em> <em>ground cover. The experimental sites in this study were selected so that they could define the lowland areas of Banat as a whole. The working methodology was divided into two stages. In the first phase, the physical-geographical conditions were analyzed at the level of the Timiş plain, and in the second phase, the geospatial information for the meadow surfaces was extracted from the experimental device: plot geometry, including area calculation, minimum, maximum and average altitude, minimum maximum and average slope, climatic conditions (air temperature and atmospheric precipitation), geological substrate and soils, vegetation aspects and mode of operation It was found that grasslands are vulnerable to the following groups of factors and/or processes: flood hazard, in the case of grasslands on alluviosols; deficiency or excess moisture; in the case of high temperatures, due to low rainfall, the decrease in the amount of biomass of grasslands in the second and third cycles of grazing. For all risk factors, measures to combat or mitigate adverse effects have been specified.</em></p> Luminiţa COJOCARIU Loredana COPĂCEAN Cristian BOSTAN Adina HORABLAGA Dorin RECHIŢEAN Christianna ISTRATE– SCHILLER Marinel HORABLAGA1 Petru RAIN Veronica SĂRĂȚEANU Copyright (c) 2022 LIFE SCIENCE AND SUSTAINABLE DEVELOPMENT 2022-07-29 2022-07-29 3 1 70 77 STUDY REGARDING THE QUALITY AND PRODUCTIVITY POTENTIAL OF SOME PERSPECTIVE MAIZE HYBRIDS CREATED AT ARDS LOVRIN <p><em>Zea mays L. is an important annual crop species, belonging to Poaceae family, a species that comes from teosinte (Zea mays L. spp Mexicana</em>). <em>Maize kernel is an edible and nutritive part of the plant, this crop being an essential source of various phytochemicals, vitamins, minerals and other micro- and macronutrients. Maize breeding is considered to be an important and complex program that has has unique elements, which are different from other cultivated self-pollinated crops, each obtained hybrid having its own combination of genetic effects. Therefore, this paper aims to study a comparative culture with 20 maize hybrids created at ARDS Lovrin, hybrids from indurata and dentata convarieties, in order to highlight hybrids with a high productive or qualitative potential. Regarding to production capacity, the analyzed hybrids had a different behavior, the highest values being recorded at H10-1010 (9767 kg*ha<sup>-1</sup>) and H13-1013 (9631 kg*ha<sup>-1</sup>) hybrids. The highlighted hybrids differs significantly from the other ones, registering an increase of 32.6%, respectively 30.8% compared to the experience average. In terms of quality, the following hybrids H1, H3 and H19 were evidentiated. H1-1001 hybrid registered a protein content in kernel of 11.30% and oil by 6.55%; H3-1003 hybrid registering close values, of 11.35% protein and 6.65% oil content and H19 hybrid with 10.95% protein content, respectively 6.50% oil content in kernel. Summing up,</em> <em>from the results obtained for the hybrids taken in study, the hybrids mentioned above were highlighted, from both qualitative and productive point of view. </em></p> Georgiana NEGRUȚ Busuioc VACARIU Alina Laura AGAPIE Ciprian BUZNA Anca Ofelia PANDA Gabriela GORINOIU Copyright (c) 2022 LIFE SCIENCE AND SUSTAINABLE DEVELOPMENT 2022-07-29 2022-07-29 3 1 78 83 INFLUENCE OF NP MINERAL FERTILIZATION ON SOYBEAN CROPS <p><em>Soybean is one of the most important sources of vegetable protein, having a great agronomic importance by fixing atmospheric nitrogen following symbiosis with bacteria of the genus Rhizobium. Bifactorial experience, of the AxB model A - phosphorus doses: P<sub>0</sub>; P<sub>40</sub>; P<sub>80</sub>; P<sub>120</sub>; P<sub>16</sub> and B - nitrogen doses:N<sub>0</sub>; N<sub>25</sub>; N<sub>50</sub>; N<sub>75</sub>; N<sub>100</sub>, aims to identify the influence of these doses on the development of soybean cultivation. Although soybeans are a heavy consumer of nitrogen and phosphorus in the early stages of development, however, they do not react well to large amounts of nitrogen as they prevent the development of the number of nodules on soybean roots and inhibits the growth of bacteria, and the increases obtained production do not justify the higher amount of nitrogen applied to soybeans. The number of pods and the mass of 1000 grains are also influenced more by the application of phosphorus doses than &nbsp;nitrogen. Phosphorus applied in higher amounts leads to an increase of over 60% of the number of nodules but also at significant production increases of 5-7%, compared to the non-fertilized variant. On nutrient-rich soils, soybeans do not require fertilization with large amounts of nitrogen, but they react very well to the application of phosphorus fertilizers.</em></p> Alina ȘIMON Adrian CECLAN Florin RUSSU Marius BĂRDAȘ Felicia CHEȚAN Alin POPA Copyright (c) 2022 LIFE SCIENCE AND SUSTAINABLE DEVELOPMENT 2022-07-29 2022-07-29 3 1 84 90 THE EFFECT OF CLIMATE CONDITIONS ON THE PHENOLOGICAL FEATURES OF THE AUTUMN OAT CROP <p><em>In recent years, more and more research has been carried out on cereal crops in the context of climate change, as many of the scenarios predict a frequent and severe drought in the coming years for all crops, and thus, climate dependence requires a series of research for the efficient use of water. This study aims to demonstrate the influence of Lovrin's climatic conditions, resulting in different phenological features for autumn oat genotypes. Setter T. L. argues that in addition to the stages of development and the severity of stress, the effects of water deficit on cereals depended on soil type, environmental conditions; Banyai J., adds cultivated varieties or species and also Yang J. Specifies the cultivation technologies used. Thus, direct observations were made to describe the vegetation period of genotypes in the comparative competition culture of the autumn oats culture. So, we wrote down each phenological station using decimal codes for the growth and development of cereals according to those indicated by Chan and Konzak in 1974. In this paper, we have highlighted just a few more important phenophases to discuss the impact of Lovrin's climate conditions on differences in vegetation between genotypes. According to the climate data from Lovrin, we note the existence of differences in precipitation, respectively in the 2019-2020 agricultural year a deficit of precipitation (-49.2 mm) is observed, while in the 2020-2021 agricultural year we have values of +78 mm. As for the situation in the case of thermal conditions, in the agricultural year 2019-2020 there is a difference of 0,2 ℃ compared to the agricultural year 2020-2021.Following this study, we concluded that the effect of precipitation has the greatest impact on the growth and development of genotypes in the comparative competition culture of autumn oats, thus in the agricultural year 2020-2021, where we noticed the total average rainfall of +78 mm we obtained a different number of days for each interval between vegetation periods. Therefore, a difference of 23 days is noted from the growth of the plant to the twinning time between the agricultural year 2019-2020 and 2020-2021because, from September 2019 to May 2020, there was an average of -4.84 mm of precipitation, and from September 2020 to May 2021 there was an average of +13.71 mm precipitation.For the interval from the bellows phase to flowering, a value of 1,4 mm of precipitation is recorded in May 2021, especially important in terms of the grain filling process. In the case of baking phenophases, the situation is different, the thermal factor was noted with an average of +2.8 in June 2021, which has as a result the optimal time to harvest when the grain moisture decreases considerably.</em></p> Alina RUJA Gabriela GORINOIU Karina Roberta SUHAI Alina Laura AGAPIE Florin SALA Christianna - Maria ISTRATE – SCHILLER Copyright (c) 2022 LIFE SCIENCE AND SUSTAINABLE DEVELOPMENT 2022-07-29 2022-07-29 3 1 91 97 DISTRIBUTION OF GRASSLANDS IN A TERRITORIAL ASPECT UNDER THE IMPACT OF NATURAL AND ANTHROPIC FACTORS <p><em>Grasslands are spread all over the globe, their distribution being possible by various modern methods. The spatial representation of the grasslands, in correlation with other categories of land use, provides us with an overview of the activities of the geographical area and also represents a first stage in the field research. In this context, the purpose of the research is to analyze the territorial distribution of grasslands through geographic information systems (GIS), based on land use maps and to identify natural and anthropic factors with direct and/or indirect impact in their spatial modeling. The study area is characterized by variable conditions of landform, being partially located in the following physical-geographical units, Vinga plain, Gătaiei plain, Timiș plain, Lipova Hills, The Sacoș-Zăgujeni Hills and Anina Mountains. As representative of the analyzed area, we chose five ATUs, framed in a working transect. In the sub-areas of the analyzed work transect there are variations in the way of organizing the land, respectively in the territorial distribution of the grasslands. Thus, the largest areas of grassland are present in ATU Recaş (6253,83 ha) which has a hilly appearance (with altitudes between 90 – 287 m). Large areas of grasslands are also found in ATU Fârliug (3.163,23 ha) and ATU Pișchia (2255,25 ha) located in different landform conditions. The smallest areas of grasslands are found in ATU Vermeș, respectively 861,63 ha. From the point of view of the territorial distribution, the areas of grasslands shall be grafted on all forms of landform and under all environmental conditions in the territory under consideration. The share of grassland depends on natural factors (soil, climate, landform) but also on the other production activities, specific to each area, which is also found in the distribution of the other land use categories, for each ATU.</em></p> Marinel HORABLAGA Luminiţa COJOCARIU Loredana COPĂCEAN Cristian BOSTAN Christianna ISTRATE – SCHILLER Petru RAIN Dorin RECHIŢEAN Alina AGAPIE Copyright (c) 2022 LIFE SCIENCE AND SUSTAINABLE DEVELOPMENT 2022-07-29 2022-07-29 3 1 98 105 NORMALIZED DIFFERENCE VEGETATION INDEX (NDVI) IN THE EVALUATION OF PHENOLOGICAL DYNAMICS IN DACTYLIS GLOMERATA L. AND MEDICAGO SATIVA L <p><em>The fodder species Medicago sativa L. and Dactylis glomerata L. are appreciated for their yield, due to their high perenniality and the large number of scythes in a year, as well as for their different use. In recent years, fodder crops and grasslands have been given a special place in precision agriculture, and by using remote sensing and implicitly the Normalized Difference Vegetation Index (NDVI), the vegetation status of crops is appreciated.</em> <em>In this context, the paper aims to capture the time dynamics, in different phenological stages, of the species Dactylis glomerata L. and Medicago sativa L., based on spectral information extracted from the analysis of PlanetScope satellite images, with a spatial resolution of 3 m. carried out in the experimental lots of the Lovrin Agricultural Research and Development Station - taking into account two plots cultivated with Dactylis glomerata L. (1.22 ha) and Medicago sativa L. (0.8 ha), located in the second and third year of vegetation. The analysis of the spectral information, materialized by NDVI values, with the data collected in the field regarding the dynamics of crop development (BBCH Code) led to the extraction of some useful conclusions for the agricultural practice regarding the health status of the two crops. NDVI values in Dactylis glomerata L. and Medicago sativa L. were different depending on crop evolution. Thus, at the end of winter, the NDVI index had the same average values for both crops (0.746), validated by field observations on crop health.</em> <em>Later on, for the Medicago sativa L. crop, the values of the NDVI index are increasing until sprout phenophase, when green mass was mowed for fodder. In the seed culture of Dactylis glomerata L. the values of the NDVI index are also increasing in the vegetative phase and reach the maximum threshold of 0.833, on 12.05.2020, in the phenophase - 50% of flowering (BBCH), after which it there is a decrease in them alonside with the change of the color of the plants as a result of the appearance of spikelets and later their ripening. The values of the NDVI index immediately after harvest in the two crops are different, being determined by their biological peculiarities.</em></p> Cristian BOSTAN Nicolae Marinel HORABLAGA Dorin RECHIŢEAN Petru RAIN Christianna – Maria ISTRATE – SCHILLER Adina HORABLAGA Loredana COPĂCEAN Alina AGAPIE Natașa BOSTAN-PÎNIȘOARĂ Luminiţa COJOCARIU Copyright (c) 2022 LIFE SCIENCE AND SUSTAINABLE DEVELOPMENT 2022-07-29 2022-07-29 3 1 106 112 VARIABILITY OF SOME PARAMETERS IN THE LEAF GEOMETRY DESCRIPTION IN Solanum nigrum L. <p><em>The study analyzed the variability of some foliar parameters in the description of leaf geometry in Solanum nigrum L. 50 leaves were taken from mature plants of Solanum nigrum L. from the Didactic and Experimental Resort area, BUASVM Timisoara, Timis County, Romania. Randomly, 25 leaves were taken for analysis. The length (L) and width (w) parameters of the leaves were determined. The leaves were scanned and the perimeter (Per) and scanned leaf area (SLA) were determined. The fractal geometry of the leaves was evaluated by fractal analysis, and the fractal dimension (D) was determined by the box-counting method. The mean values for the foliar parameters considered were: L=7.820±0.206, w=4.647±0.151, Per=23.273±0.686, SLA=19.266±0.968, D=1.628±0.007.</em><em> Very strong correlations between SLA and D (r=0.960<sup>***</sup>) have been identified. Strong correlations were recorded between L and w (r=0.836<sup>***</sup>), between SLA and Per (r=0.839<sup>***</sup>), between D and Per (r=0.820<sup>***</sup>). Moderate correlations were recorded between Per and w (r=0.747<sup>***</sup>), between SLA and w (r=0.733<sup>***</sup>), between D and w (r=0.722<sup>***</sup>). Weak correlations were recorded between Per and L (r=0.616<sup>**</sup>), between SLA and L (r=0.570<sup>**</sup>), between D and L (r=0.615<sup>**</sup>). In all cases, the correlations presented statistical certainty (<sup>**</sup> p &lt; .01, <sup>***</sup> p &lt; .001). Regression analysis facilitated the obtaining of equations that expressed the parameters variation in the description of the studied leaves geometry (p&lt;0.001). 3D and isoquant models were obtained to describe the SLA variation in relation to L and w, and the D variation in relation to L and w, respectively in relation to L and Per. The variability of the analyzed parameters, in descending order was CV<sub>SLA</sub>=25.1231, CV<sub>w</sub>=16.2707, CV<sub>Per</sub>=14.6691, CV<sub>L</sub>=13.1813, CV<sub>D</sub>=2.2802. The fractal dimension (D) was the most stable parameter, among those analyzed, for characterizing the leaf geometry in the Solanum nigrum L., with the lowest variability and the lowest degree of values dispersion.</em></p> Florin SALA Dan MANEA Copyright (c) 2022 LIFE SCIENCE AND SUSTAINABLE DEVELOPMENT 2022-07-29 2022-07-29 3 1 113 122 STUDY OF THE CORRELATION OF SOME GROWTH PARAMETERS AT DIOECIOUS HEMP <p><em>The present paper deals with the study of the correlation of some growth parameters to 10 bioecotypes of dioecious hemp (Cannabis sativa L) at A.R.D.S. Lovrin. Ten bioecotypes were studied, four of which are established varieties created at A.R.D.S. Lovrin (Lovrin-110, Silvana, Armanca și Teodora) and six perspective lines (Zak-127xLv-110, Lv-428/01, S33/08 R, Lv-434x406CS/04, S354/15, Lv-149 CS/16). From the existing biological material, the dioecious hemp variety Silvana was chosen as a control. A monofactorial experience, having as a factor the existing biological material, was placed in the field of the laboratory for the improvement of dioecious hemp. The four parameters studied and presented are: the total length of the plant, the length of the inflorescence, the technical length and the diameter of the stem of the hemp plants, parameters that were influenced by the climatic conditions of the studied years 2020-2021. Compared to the blank variant, five of the six lines of perspective stand out in terms of the superiority of the technical length of the stem, two of them with very significant positive differences, statistically provided for the probability of transgression 0,1 %.</em></p> Anca Ofelia PANDA Ciprian BUZNA Cosmina Alina LEAHU Georgiana NEGRUȚ Copyright (c) 2022 LIFE SCIENCE AND SUSTAINABLE DEVELOPMENT 2022-07-29 2022-07-29 3 1 123 128 PERFORMANCE OF THE DACTYLIS GLOMERATA L. SPECIES IN THE CONDITIONS OF A.R.D.S. LOVRIN <p><em>The Dactylis glomerata L. species is found in a &nbsp;spontaneous state in the meadows of Romania. It is an essential component in the composition of simple mixtures with alfalfa and complex mixtures along with other grasses and perennial legumes. The manifestation of agrobiological characteristics in Dactylis glomerate L. is characterised by complexity and variability, influenced by technology, soil, and climatic conditions that vary inherently in space and time.</em> <em>The research was focused on the knowledge of the agro-biological characteristics and production capacity of the species Dactylis glomerata L. in correlation with local conditions. The research was carried out at </em><em>Agricultural Research-Development Station of Lovrin</em> <em>and as a biological material the cock's-foot genotype LVDG1 was used, the culture has been established in the Autumn of 2020. Biometric measurements were made on the main agro-biological characters until the first scythe was harvested as a green mass feed. Research shows that all parameters analyzed have the same tred, in both experimental years, with small variations, the differences being attributed to the lack of uniformity of precipitation, the temperature not being a restrictive factor. In the case of the experimental site, the characteristics and type of variation of the decadal quantities of atmospheric precipitation, expressed by the modified Angot index (km), show that in the range of 1.01 to 31.05. 2021, the decades with a pluviometric surplus prevail, with large differences compared to the same period of 2022, which is also found in the externalization of the characters in cock's-foot. The rainfall in the year 2021 contributed to a better expression of vegetative parameters, including the production of green mass at the first scythe. Hence, in 2021 was the highest production of green mass at the first scythe of 25 t.ha <sup>-1</sup>. &nbsp;</em></p> Dorin RECHIŢEAN Cristian BOSTAN Christianna ISTRATE – SCHILLER Nicolae Marinel HORABLAGA Luminiţa COJOCARIU Loredana COPĂCEAN Maria – Despina BORDEAN Ciprian BUZNA Copyright (c) 2022 LIFE SCIENCE AND SUSTAINABLE DEVELOPMENT 2022-07-29 2022-07-29 3 1 129 136