scholarly journals Influence of crop care technology on sunflower yield and oil content

2021 ◽  
Vol 344 (1) ◽  
pp. 133-135
Author(s):  
B. N. Nasiyev
Keyword(s):  
Raw Materials ◽  
Soil Layer ◽  
Steppe Zone ◽  
Mineral Fertilizers ◽  
Seeding Rate ◽  
The West ◽  
Dry Steppe ◽  
Cultivation Technology ◽  
West Kazakhstan ◽  
Care Technology

Relevance. One of the important elements of adaptive sunflower cultivation technology is the system of pre-sowing tillage, which is aimed at the maximum destruction of seedlings and seedlings of weeds, preserving the accumulated reserve of soil moisture and creating optimal conditions for seed germination. The aim of the research is to study the elements of adaptive technologies of sunflower cultivation (methods of crop care) to increase its productivity and provide vegetable oil producers with high-quality raw materials.Methods. According to the morphological features of the genetic horizons of the profile and agrochemical indicators of the arable soil layer of the experimental plots, they are characteristic of the 1st dry-steppe zone of Western Kazakhstan. The area of plots for sunflower cultivation is 90m2, the repetition is three times, the location of plots is randomized. The experiments used a hybrid of sunflower Avangard. Seeding rate recommended for the dry-steppe zone of the West Kazakhstan region. During the research, nitrogen and phosphorous mineral fertilizers were used in the recommended doses for the region.Results. As a result of research on methods of crop care in the conditions of the 1st dry-steppe zone of the West Kazakhstan region, it was found that to control weeds on sunflower crops, it is advisable to harrow the soil with pre-sowing cultivation and use the herbicide roundup 5 days before sowing with a rate of 2 l/ha (option 2), where high structural indicators were noted and the highest seed yield was obtained

SOUTHERN CHERNOZEMS FERTILITY REPRODUCTION IN NORTHERN KAZAKHSTAN

2020 ◽  
Keyword(s):  
Crop Rotation ◽  
Humus Content ◽  
Steppe Zone ◽  
Perennial Grasses ◽  
Wheat Crop ◽  
Mineral Fertilizers ◽  
Northern Kazakhstan ◽  
Dry Steppe ◽  
Positive Balance ◽  
High Doses

Fertility reproduction features of southern carbonate chernozems in the conditions of the dry-steppe zone of Northern Kazakhstan (Shortandinsky district of Akmola region) are studied. We studied the changes of humus content in the model micro plot experience. Various variants of the experiment with non-fallow and dump steam without fertilizers, grain crops with different doses of mineral fertilizers, manure, as well as with straw and sideral crops (pea-oat mixture, Donnik) are laid down. The introduction of rotted manure in small doses of 20 t / ha did not provide an increase in humus during crop rotation. When adding 40 and 80 t / ha of manure to the fallow field, it allowed to increase the humus content by 0.24 and 0.18 % of the initial amount. The introduction of sideral steam and perennial grasses into crop rotation enhanced the processes of humification and provided a positive balance of humus. In this version of the experiment, the amount of humus increased by 0.10-0.13 %. The greatest accumulation of organic matter occurred when using melilot: the increase in humus was 0.39 %. Long-term cultivation of permanent wheat crop in one field, even with high doses of mineral fertilizers, does not provide significant reproduction of soil fertility. The application of mineral fertilizers does not contribute to the increase of humus in the soil. The greatest decrease in humus content in southern chernozems is observed in the permanent dump and waste-free pair-0.11 and 0.13% over a 6-year period of observations.

Problems of sustainability of production of the agro-industrial complex of the West Kazakhstan region

2021 ◽  
Author(s):  
Б.Т. Базарова ◽  
Б.Қ. Копбулсынова ◽  
Ж.А. Аймешева ◽  
B. Bazarova ◽  
B. Kopbulsynova ◽  
...  
Keyword(s):  
Sustainable Development ◽  
Agricultural Production ◽  
Crop Production ◽  
Raw Materials ◽  
Raw Material ◽  
Industrial Complex ◽  
The West ◽  
Processing Industry ◽  
West Kazakhstan ◽  
The Impact

Батыс Қазақстан облысындағы кәсіпорындардың эволюциясы экономикалық дамудың жалпы циклдік сипатына байланысты да, әр түрлі сыртқы және ішкі факторлардың осы салаға әсер етуінен, сондай-ақ даму процесінде сөзсіз ауытқулар салдарынан ауытқуларға ұшырайды. Батыс Қазақстан облысының аймақтық агроөнеркәсіптік кешенін тұрақты дамытудың басымдықтары талдау арқылы анықталуы керек. Зерттеудің мақсаты - Батыс Қазақстан облысының агроөнеркәсіптік кешенінің тиімді және тұрақты дамуын зерттеу болып табылады. Бұл тақырыпты зерттеу кезінде статистикалық-экономикалық әдіс, талдау және синтез қолданылды. Ауылшаруашылық кешенінің жеке аймақ ретінде тұрақты дамуы да, жалпы елдің де дамуы ауылшаруашылық кешенінің тұрақты қалыптасуынсыз мүмкін емес, себебі оның түпкі өнімі қайта өңдеу өнеркәсібі болып табылады, ал оның мақсаты - талаптарына сай халықты сапалы өніммен қамтамасыз ету. Талдау көрсеткендей, ауылшаруашылық өндірісінің қазіргі жағдайы, қолайсыз факторлардың әсерінің күшеюімен сипатталады, ең алдымен табиғи факторлардың өндірісінде, жалпы өсімдік шаруашылығы өнімінің жылдық айырмашылықтарын тудырады, және өз кезегінде мал шаруашылығындағы ауытқуларға әкеледі, сонымен қатар оның әсері өңдеуші салаларда сезіледі, ал бұл өнеркәсіптің шикізаты болып табылады. Зертеу барысында 2015 жылдан бастап Батыс Қазақстан облысының аумағында ауыл шаруашылығы өнімдері өндірісінің күрт төмендегені анықталды, бұл жалпы, сондай-ақ өсімдік шаруашылығы мен мал шаруашылығы салалары бойынша да өндіріс тұрақтылығының төмендеуіне әкелді, және ол бүгінгі күнге дейін жалғасуда. Агроөнеркәсіптік кешеннің шикізат саласындағы өндіріс тұрақтылығының төмендеуі қайта өңдеу өнеркәсібі өнімдерін өндіруде ауытқулардың артуына әкеліп соқтырды, бұның нәтижесінде халыққа азық-түлік өнімдерін ұсынуда тұрақсыздық пайда болды. Батыс Қазақстан облысының АӨК-ін оның салаларының өнімділігі мен кірістілігін арттыруға бағытталған одан әрі дамыту өндірісті жаңғыртуды және қайта жарақтандыруды, оның инфрақұрылымын дамытуды және салалық кластерлерді қалыптастыруды талап етеді. Кілт сөздер: агроөнеркәсіп кешені, тербеліс, аграрлық сектор, өндіріс, халық саны, агротехника, экономика, талдау, өнімдер, өсімдік шаруашылығы. The evolution of enterprise in the West Kazakhstan region is subject to fluctuations due to both the general cyclical nature of economic development and the impact of various external and internal factors on this industry, as also fluctuations unavoidable in the evolution process. The priorities for sustainable evolution of the regional agro-industrial complex of the West Kazakhstan region should be identified through analysis. The goal of the research is to study the effective and sustainable development of the agro-industrial complex of the West Kazakhstan region. Through studies this topic, the statistical-economic method, analysis and synthesis were used. Sustainable development of the agro-industrial complex of both a particular region and the country as a whole is impossible without the stable functioning of its core - agriculture, the final product of which is used by the processing industry, whose goal is to provide the population with high-quality products in volumes that meet their requirements. Current state of agricultural production, as the analysis shows, is characterized by an increase in the influence of unfavorable factors on production, first of all natural ones, which cause annual differences in the production of gross crop production, which, in turn, convey fluctuations to the livestock industry and, as a result, affects the processing industries. it is the raw material of the industry. In the course of the study, it was found that, since 2015, in the territory of the West Kazakhstan region, there has been a sharp decline in agricultural production, which led to a decrease in the stability of production in general, and in the fields of crop and livestock production, which continues to the present. A decrease in the sustainability of production in the raw materials sector of the agro-industrial complex entailed an increase in fluctuations in the production of products of the processing industry, which ultimately resulted in the emergence of an instability in the supply of food to the population. Further development of the agro-industrial complex of the West Kazakhstan region, aimed at increasing the productivity and profitability of its industries, requires the modernization and re-equipment of production, the development of its infrastructure and the formation of industry clusters.

scholarly journals Assessment of ecological plasticity and stability of sunflower hybrids (Helianthus annuus L.) in Ukrainian Steppe

2018 ◽  
Vol 8 (1) ◽  
pp. 289-296
Author(s):  
O. A. Eremenko ◽  
V. V. Kalitka ◽  
S. M. Kalenska ◽  
V. M. Malkina
Keyword(s):  
Steppe Zone ◽  
Yield Potential ◽  
Ecological Stability ◽  
Ecological Plasticity ◽  
Average Group ◽  
Relative Air Humidity ◽  
Dry Steppe ◽  
Cultivation Technology ◽  
Varying Environments ◽  
Growing Conditions

Modern hybrids of sunflower show a pronounced response to changes in agrometeorological conditions of their growing. The<br />research was carried out during 2013-2015 under conditions of insufficient moisture in the Southern steppe of Ukraine. Field<br />and mathematical-statistical methods were used. A comparative assessment of levels of ecological stability was made for 7<br />sunflower hybrids (the company “Pioneer”). The application of plasticity and stability analysis by the Eberhard-Russell method<br />allows carrying out an integrated assessment of new hybrids in terms of their adaptability to growing conditions and a reaction<br />norm of genotypes to cultivation technology. In the dry steppe zone the sunflower realizes 45% of its genetic yield potential.<br />The highest yield of the studied hybrids was observed in 2013 when, despite the unfavourable hydrothermal index of the year,<br />the minimum relative air humidity during the flowering period was optimal (61.8%). A certain number of genotypes are<br />characterized by the average group value of the plasticity index of yield (i.e. close to 1), namely: PR64LE19, PR64LE71, PR64LE11, PR64A71. Stability ranges from 0.29 in the hybrid PR64LE11 to 32.51 in the hybrid PR64LE19. The hybrids PR64LE71 and PR64LE19 change their ecological plasticity under varying growing conditions. The hybrid PR64F66 is less responsive to varying environments than the whole set of hybrids on average but, compared to others, exhibits average stability. The best results were shown by the hybrids PR64F50 and PR64A89, since they are more sensitive to varying environments and more stable than other hybrids. Growing hybrids of different levels of intensity, genetically and biologically diverse, allows the effective exploitation of agroecological potential of different zones.

scholarly journals Peculiarities of formation the grain productivity of spring barley depending on terms and norms of foliar fertilization.

2020 ◽  
Vol 4 (2) ◽  
pp. 272-280
Author(s):  
A. D. Gyrka ◽  
I. D. Tkalich ◽  
Yu. Ya. Sydorenko ◽  
O. V. Bochevar
Keyword(s):  
Ammonium Nitrate ◽  
Spring Barley ◽  
Steppe Zone ◽  
Ordinary Chernozem ◽  
Mineral Fertilizers ◽  
Seeding Rate ◽  
Foliar Fertilization ◽  
Biological Potential ◽  
Grain Productivity ◽  
Yield Structure

One of the ways to improve the nutritional conditions of plants and therefore increase the productivity of agrocenoses of spring cereals, is the use of mineral fertilizers, both in their main application and in the spring fertilization of vegetative plants. And that is why the purpose of study was to improve agro-technical measures for growing spring barley, which would be based on the use of biological potential of the crop and the use of resource-saving technologies in the Northern Steppe of Ukraine. The study was conducted at the Erastivka Experimental Station of SI Institute of Grain Crops of NAAS during 2017–2019, according to generally known methods. Soil of experimental field – ordinary chernozem, low-humic, loamy. The humus content in arable soil layer (0–30 cm) – 4,0–4,5 %, total nitro-gen – 0,23–0,26 %, phosphorus – 0,11–0,16 %, potassium – 2,0–2,5 %, pH of water extract – 6,5–7,0. Field experiments were laid in six-field crop rotation after predecessor winter wheat. In experi-ments seeded spring barley of variety Stalker with seeding rate 4,5 million of grains/ha. Soil prepara-tion, sowing, care of crops and harvesting were carried out strictly according to the zonal recommendations. Variants in a field experiment designed systematically, with three replications. Accounting plots area – 25 m2. Arid conditions of Ukraine’s Steppe zone is quite complex. Two-thirds of land in Ukraine referred to zone of risky agriculture, but even here you can use 30–50 % and more of varieties capacity, in consideration of importance the local gene pool in creating highly adapted varieties based on local varieties and using the developed agrotechnical growing measures, that promotes plants to be resistant to dry conditions of Steppe zone of Ukraine. Weather conditions during the investigation were different, which made it possible to fully assess its impact on grain productivity potential of spring small cereals. Phenological observations, analysis of yield structure elements and grain productivity of spring barley of variety Stalker when grown without fertilizers and fertilizing with N30P30K30 as well as the use of different terms and doses of foliar fertilization of plants with ammonium nitrate and humic preparation humisol plus in conditions of Steppe zone of Ukraine are presented. It was found that the growth, development and formation of productivity elements of spring barley plants were significantly influenced by the timing and dosing of fertilization. Earlier fertilization of plants with ammonium nitrate and humisol plus, carried out on seedlings and in the tillering phase, contributed to better plant growth and development, formation of productive tillering and yield structure elements, compared with fertilization in the phase of stem elongation as in the variant of fertilized background (N30P30K30), as in the variant without the using of mineral fertilizers. Key words: spring barley, mineral fertilizers, foliar fertilization of plants, elements of head structure, grain yield.

scholarly journals Influence of agricultural technology elements on nitrogen nutrition of winter wheat

2020 ◽  
pp. 55-58
Author(s):  
Irina Vladimirovna Engovatova ◽  
Elena Olegovna Shestakova ◽  
Irina Gennadievna Storchak ◽  
Fedor Vladimirovich Eroshenko
Keyword(s):  
Winter Wheat ◽  
Nitrogen Content ◽  
Nitrogen Nutrition ◽  
Remote Sensing Data ◽  
Mineral Fertilizers ◽  
North Caucasus ◽  
Seeding Rate ◽  
The North ◽  
Cultivation Technology ◽  
New Varieties

The purpose of our research is to study the influence of the main elements of cultivation technology on the nitrogen nutrition of winter wheat plants of varieties selected by THE North Caucasus Federal RESEARCH center (Mikhailovsk, Stavropol territory), as well as to establish the possibility of assessing the nitrogen content based on remote sensing data. Methods. The field experiment was performed in accordance with the guidelines of B. A. Dospekhov. The nitrogen content was determined by the method of V. T. Kurkaev and co-authors. NDVI data was obtained using a Greenseeker hand-held scanner (Trimble). Found that the use of mineral fertilizers in technology of winter wheat cultivation increases the relative content of nitrogen in plants at the end of generative period by 30.7-61.3% as at the predecessor pairs and 12-52,5 % for the predecessor winter wheat. The highest nitrogen content in plants was observed at the seeding rate of 4 million/ha (the excess compared to 5 and 6 million/ha is 4.3-19 %). The influence of seeding dates and norms on the relative nitrogen content is not always unambiguous and depends on the conditions of a particular year. Among the varieties, Anisimovka shows high nitrogen content. During the earing phase, there is a direct correlation between the NDVI of winter wheat crops and the relative nitrogen content in plants, the correlation coefficient on average over the years of the study is 0.72. The scientific novelty of the study is that for the first time for the zone of unstable humidification of the Stavropol territory, the influence of elements of cultivation technology on the features of nitrogen nutrition of plants of new varieties of winter wheat was analyzed, and a correlation was established between the nitrogen content in the earing phase and the NDVI index.

scholarly journals PROMISING MIXED CROPS OF SUDAN GRASS WITH FORAGE CROPS

REPORTS ◽  
2020 ◽  
Vol 6 (334) ◽  
pp. 73-80
Author(s):  
B.N. Nasiyev ◽  
◽  
◽  
◽  
Keyword(s):  
Maximum Yield ◽  
Weather Conditions ◽  
Steppe Zone ◽  
Crop Productivity ◽  
Forage Crops ◽  
Sudan Grass ◽  
Dry Steppe ◽  
Digestible Protein ◽  
West Kazakhstan ◽  
Mixed Crops

An important factor in increasing the efficiency of crop diversification in West Kazakhstan and reducing the dependence of crop productivity on weather conditions is the expansion of crops most adapted to unsustainable humidification of plants such as chickpeas, Sudan grass, sorghum, corn and sunflower. One of the ways to increase the productivity of Sudanese grass is to use its mixed crops with chickpeas, sunflower, corn and sorghum. Mixtures due to the best quality indicators of feed provide the maximum yield of feed units and digestible protein. The article presents research data on the study of mixed crops of Sudanese grass with annual crops in the conditions of the 1st dry-steppe zone of Western Kazakhstan. A comparative test of mixed crops by yield from digestible protein area units revealed the most nutritionally valuable mixtures. So, in the research of 2018-2020, the largest yield for digestible protein was obtained on the variant using sunflower for silage mixed with Sudan grass (1.65 c/ha), slightly lower on the versions of using a mixture of Sudan grass and corn for silage (1.58 c/ha) and a mixture of sorghum and Sudan grass for silage (1.55 c/ha).

scholarly journals Tomato fertigation in an open ground

2019 ◽  
Vol 14 (4) ◽  
pp. 347-361
Author(s):  
Omariy Georgievich Chamurliev ◽  
Alexander Nikolaevich Sidorov ◽  
Anatoly Aleksandrovich Kholod ◽  
Georgy Omarievich Chamurliev ◽  
Natalia Vladimirovna Bogomolova
Keyword(s):  
Positive Impact ◽  
Plant Root ◽  
Soil Layer ◽  
Calcium Nitrate ◽  
Steppe Zone ◽  
Fertilizer Application ◽  
Water Soluble ◽  
Mineral Fertilizers ◽  
Chestnut Soils ◽  
Volgograd Region

Obtaining high and stable yields of tomato with good consumer qualities in the open field has now become problematic due to the fact that hybrids and varieties of tomato of an intensive type place high demands on the presence of moisture and nutrients in the root-soil layer. The required level of soil moisture in combination with the introduction of calculated doses of mineral fertilizers during the growing season provides for obtaining the planned yields of vegetables, including tomato. The most important resource for the further development of agriculture in the Russian Federation is irrigated land. Volgograd region is one of the largest irrigated agricultural regions in Russia. Growing of almost all vegetables in the region is conducted on irrigated lands. The use of only one irrigation without the use of fertilizers will not have a positive impact on the growth, development and productivity of plants. Fertigation is the most effective and economical way of delivering nutrients to the plant root system and allows to get a higher yields than other methods of fertilizer application. In fertigation systems, the control of optimal concentrations of fertilizers is easily achieved, their ratio and these parameters can be controlled automatically. The purpose of this work was to study the comparative efficiency of ammonium nitrate, calcium nitrate and a combination of calcium nitrate and ammonium chloride for tomato fertigation in combination with non-root dressings of complex water-soluble fertilizers containing macroand microelements in open feild on irrigated lighchestnut soil of dry steppe zone of chestnut soils in the Volgograd region. As a result, analysis of the use of mineral fertilizers for tomato fertigation in light chestnut soils of the Volgograd region was carried out. The positive effect of foliar dressing with microelements in the proposed dosages has been proven.

INFLUENCE OF THE SEEDING RATE ON THE PRODUCTIVITY OF SUDAN GRASS IN THE CONDITIONS OF THE DRY-STEPPE ZONE OF THE LOWER VOLGA REGION

2021 ◽  
pp. 55-65
Author(s):  
V A.I. BELENKOV ◽  
◽  
YU.A. LAPTINA
Keyword(s):  
Steppe Zone ◽  
Seeding Rate ◽  
Sudan Grass ◽  
Feed Production ◽  
Volgograd Region ◽  
Dry Steppe ◽  
High Feed ◽  
Total Productivity ◽  
Livestock Productivity ◽  
Germinating Seeds

To increase the livestock productivity, it is important to increase feed production, while expanding the areas under drought-resistant multi-grained crops that have high feed values and productivity, as well as the ability to grow quickly after mowing. One crop oа this kind is Sudan grass. But, despite all its advantages, its yield in the conditions of the Volgograd region remains at a low level, so it is necessary to improve the technology of its cultivation. The paper reflects the results of the five-year research on the ways to increase the yield of green mass of Sudan grass by determining the optimal seeding rate. The experiments were carried out on chestnut soils in the conditions of JSC “Agrofirma “Vostok” of the Nikolaevsk district of the Volgograd region. Three seeding rates were studied: 1.0, 1.5, and 2.0 mln germinable seeds per hectare. The object of research was the Yulia variety. The highest percentage of field germination in all years of research was observed in the variant with a seeding rate of 1.0 million/ha – 85.3%. At the same time, the reverse dynamics was observed in the contamination of the Sudan grass crops, and when the crops were thickened, a decrease in the number and weight of weeds was observed. The largest part of the Sudan grass crop is formed in the first mowing and ranges from 60.3% at a seeding rate of 1.0 million tons of germinable seeds/ha to 63.3% at the 1.5 mln tons of germinable seeds/ha of total productivity. The study of the influence of different seeding rates on the productivity of Sudan grass showed the advantage of a seeding rate of 1.5 mln tons of germinable seeds/ha. This option ensured an increase compared to a seeding rate of 2.0 mln germinating seeds/ha in total for three mowing of 4.3 t/ha at a seeding rate of 1.0 million. An increase in the seeding rate to 2.0 million germinable seeds/ha reduced the yield by 2.2 t/ha as compared with a normative rate of 1.5 mln germinable seeds/ha.

scholarly journals ON THE IMPROVEMENT OF TECHNOLOGY ELEMENTS OF CANABIS SATIVA L. VARIETIES CULTIVATION IN THE CONDITIONS OF FOREST-STEPPE ZONE OF THE CHUVASH REPUBLIC

2019 ◽  
Vol 54 (4) ◽  
pp. 20-24
Author(s):  
V.L. Dimitriev ◽  
◽  
L.G. Shashkarov ◽  
A.G. Lozhkin ◽  
◽  
...  
Keyword(s):  
Seed Production ◽  
Steppe Zone ◽  
Forest Steppe ◽  
Optimal Parameters ◽  
Seeding Rate ◽  
Phase 3 ◽  
Cultivation Technology ◽  
Chuvash Republic

The article considers the prospects of introduction of new elements of hemp cultivation technology in order to accelerate the production of seeds and increase the yield of stems, seeds and fiber. It is revealed that the forced reproduction of seeds of hemp varieties should be organized at the following optimal parameters of the basic elements of agricultural cultivation and seed production: in the nursery of primordial seeds with a wide-row sowing of 70 cm with a seeding rate of 0,3 million/ha and decapitation of plants in the phase of 3 pairs of leaves; on the site of original seeds with a wide-row sowing of 70 cm with a seeding rate of 0,6 million/ha and decapitation of plants in the phase 3 pairs of leaves; on elite crops with a wide-row sowing seeding rate of 0,9 million/ha and decapitation of plants in the phase of 3 pairs of leaves; on reproductive crops with wide-row sowing 45 cm with a seeding rate of 1,2 million/ha and decapitation of plants in the phase of 3 pairs of leaves.

scholarly journals Influence of various elements of cultivation technology on the chlorophyll content in winter wheat plants and its yield

2020 ◽  
Vol 196 (5) ◽  
pp. 27-37
Author(s):  
Elena Shestakova ◽  
F EROShENKO ◽  
I. STORCHAK ◽  
Lusine Oganyan ◽  
I. Chernova
Keyword(s):  
Winter Wheat ◽  
Chlorophyll Content ◽  
Combine Method ◽  
Optimal Time ◽  
Mineral Fertilizers ◽  
Seeding Rate ◽  
Sowing Time ◽  
The North ◽  
Cultivation Technology ◽  
Green Pigments

Abstract. The chlorophyll content is the most important factor that determines the intensity of photosynthesis and the overall biological productivity of plants. Therefore, the search for mechanisms that allow you to manage the production process is an important task, the solution of which will allow you to improve the technological methods of growing crops to obtain high yields. The purpose of the study is to determine the influence of various elements of cultivation technology on the chlorophyll content in plants and the yield of winter wheat. Methods. The objects of research were winter wheat crops of various varieties. The chlorophyll content was determined by the method of Ya. I. Milaeva and N. P. Primak. Crop accounting was performed using the combine method. Results. The relative chlorophyll content in winter wheat plants: lea predecessor on average 9,4 % higher than for cereals; the use of mineral fertilizers in a few increased this figure by 38,0 %, wheat ‒ 14,0 %; in the later sowing time the amount of green pigments in plants on average more than early and optimum of 10,5 and 4,0 %, respectively; in more thickened crops, the chlorophyll content in plants is lower than in sparse ones (by 13,0 %). The absolute chlorophyll content (g/m2) in winter wheat plants: in a few in an average of 45,0 % higher than for cereals; the use of mineral fertilizers in a few increased this figure at 73,4 %, for winter wheat ‒ 76,8 %; number of green pigments in plants at the optimum sowing time is on average higher than in the early (29,6 %) and late (15,2 %); at the optimal seeding rate accumulates more chlorophyll than the minimum (by 33,4 %) and the maximum (24,2 %). On average, for all cultivation technologies, the variety Stat' contains the largest amount of chlorophyll in plants, and Zustrich – the smallest. The yield of winter wheat for the lea precursor was 4,9 t/ha, for winter wheat – 3,3 t/ha. Use of mineral fertilizers on couple increased this indicator on average by 44,1 %, and on the cereal predecessor ‒ by 55,3 %. At the optimal time of sowing, the highest yield was formed, and on average it was 5,1 t/ha for varieties. seeding Rates did not have provable differences on the yield of winter wheat. The highest yield was obtained in the Rate variety on the predecessor of pairs on a fertilized background – 7,5 t/ha. Scientific novelty. The features of the influence of various precursors, the level of mineral nutrition, timing and seeding rates on the content of chlorophyll in plants and the yield of winter wheat crops of new varieties of selection of the North Caucasian FSAC were revealed. The correlation between the relative and absolute content of chlorophyll in winter wheat plants and its yield for these varieties in the zone of unstable moisture in the Stavropol territory was determined.

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