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Modern flax varieties have a high genetic potential for productivity, which can be realised by improving the elements of cultivation technology, in particular, the fertilisation system, which is why the study is relevant. The purpose of the study was to investigate the regularities of the development of productivity of common flax plants and determine changes in quality indicators depending on the application of improved agrotechnological techniques in the soil and climatic conditions of the Western Forest-Steppe. The following methods were used: field, laboratory (to determine qualitative indicators), and statistical (to assess the reliability of data). Field studies were conducted during 2021- 2023 on grey forest surface-gleyed soils. The features of growth and development of common flax varieties Miandr, Oberih, Usivskyi and Ivanivskyi were studied using the following fertiliser rates: N20P40K60; N30P60K90; N45P90K135. It was found that the productivity of common flax varied depending on the dose of mineral fertilisers and varietal characteristics. On average, in 2021-2023, the growing season of common flax lasted 91-94 days (depending on the variety and mineral nutrition of plants). The highest yield of flax straw (4.37 t/ha) was obtained on average for 2021-2023 in the Oberih variety, subject to the application of a dose of mineral fertilisers N30P60K90. The increase over control was 0.52 t/ha (13.51%). The yield of straw in the Miandr variety varied from 3.59 t/ha (in the control) to 4.31 t/ha (with the application of N45P90K135), for the Usivskyi variety – 3.97-4.17 t/ha, for the Ivanivskyi variety – 3.12-3.81 t/ha. In terms of seed yield, the highest indicators on average for 2021-2023 were obtained from the Miandr variety, provided that a dose of mineral fertilisers N45P90K135 was used – 1.26 t/ha. The control yield was 0.88 t/ha. A similar trend was observed in the Oberih variety with seed yield indicators of 0.93 t/ha and 0.58 t/ha in the control. The seed yield of the Miandr variety exceeded the indicator of the Oberih variety by 0.33 t/ha against the background of fertiliser N45P90K135. Against this background, fertilisation resulted in the highest seed yields in the varieties Usivskyi (0.99 t/ha) and Ivanivskyi (0.91 t/ha), which was 0.17 t/ha (20.73%) and 0.07 t/ha (8.33%) higher than the control variant, respectively. The results of these studies can be used to adjust the elements of the technology of growing common flax in production conditions to increase the yield and quality of fibre

Modern flax varieties have a high genetic potential for productivity, which can be realised by improving the elements of cultivation technology, in particular, the fertilisation system, which is why the study is relevant. The purpose of the study was to investigate the regularities of the development of productivity of common flax plants and determine changes in quality indicators depending on the application of improved agrotechnological techniques in the soil and climatic conditions of the Western Forest-Steppe. The following methods were used: field, laboratory (to determine qualitative indicators), and statistical (to assess the reliability of data). Field studies were conducted during 2021-2023 on grey forest surface-gleyed soils. The features of growth and development of common flax varieties Miandr, Oberih, Usivskyi and Ivanivskyi were studied using the following fertiliser rates: N20P40K60; N30P60K90; N45P90K135. It was found that the productivity of common flax varied depending on the dose of mineral fertilisers and varietal characteristics. On average, in 2021-2023, the growing season of common flax lasted 91-94 days (depending on the variety and mineral nutrition of plants). The highest yield of flax straw (4.37 t/ha) was obtained on average for 2021-2023 in the Oberih variety, subject to the application of a dose of mineral fertilisers N30P60K90. The increase over control was 0.52 t/ha (13.51%). The yield of straw in the Miandr variety varied from 3.59 t/ha (in the control) to 4.31 t/ha (with the application of N45P90K135), for the Usivskyi variety - 3.97-4.17 t/ha, for the Ivanivskyi variety - 3.12-3.81 t/ha. In terms of seed yield, the highest indicators on average for 2021-2023 were obtained from the Miandr variety, provided that a dose of mineral fertilisers N45P90K135 was used - 1.26 t/ha. The control yield was 0.88 t/ha. A similar trend was observed in the Oberih variety with seed yield indicators of 0.93 t/ha and 0.58 t/ha in the control. The seed yield of the Miandr variety exceeded the indicator of the Oberih variety by 0.33 t/ha against the background of fertiliser N45P90K135. Against this background, fertilisation resulted in the highest seed yields in the varieties Usivskyi (0.99 t/ha) and Ivanivskyi (0.91 t/ha), which was 0.17 t/ha (20.73%) and 0.07 t/ha (8.33%) higher than the control variant, respectively. The results of these studies can be used to adjust the elements of the technology of growing common flax in production conditions to increase the yield and quality of fibre. [ABSTRACT FROM AUTHOR]

The demand for wheat is projected to increase by 60% by 2050, highlighting its critical importance. This research aimed to investigate the impact of cultivation technologies on grain yield and the economic efficiency of different cultivation technologies for spring wheat in the non-chernozem zone of the Russian Federation, where most research has focused only on yield and quality comparisons. Field experiments were conducted over two cropping seasons 2022 and 2023, using a split block design with three replications to assess three different cultivation technologies (Basic, Intensive and High-Intensive) and three genotypes (Agros, Belyana and Radmira). Findings revealed that variety and cultivation technology significantly (p ≤ 0.05) affected spring wheat grain yields, agronomic efficiency of potassium (AE K), and phosphorus (AE P). Plots amended with basic and high-intensive cultivation technologies exhibited the lowest and highest wheat grain yields of 3.9 and 4.9 t ha−1, respectively. Belyana had the highest grain yield (5.0 t ha−1) followed by Agros (4.9 t ha−1). There was a significant increase in all economic parameter estimates with improved cultivation technologies. Agros exhibited the highest gross revenue over control (42718.0 Rub. ha−1), grain yield value (67900.0 Rub. ha−1), and net return (17537.0 Rub. ha−1) under high intensive cultivation technology, while Radmira had the highest marginal return (0.770) under intensive and variable cost ratio (1.77) under high intensive cultivation technology, whereas Belyana had the lowest values. Findings established that the application of improved cultivation technology maximizes crop yields and net returns, to meet the demands of the growing population. • Economic analysis showed a significant increase in grain yield and net return. • Yield of wheat genotypes enhance in high-intensive cultivation technology. • Potassium and Phosphorus efficiencies increase, with Intensive and High intensive cultivation technologies. [ABSTRACT FROM AUTHOR]

The aim of this study was to determine the accumulation of selected micro-elements in sweet potato tubers depending on their genotype and cultivation method. The field experiment was conducted in 2019 in Żyznów, Podkarpackie Province (49°49ʹ01˝N 21°50ʹ21˝E), in brown earth, on defective wheat complex. It was based on a randomized block design in three replicates. The experimental factors were cultivars (Carmen Rubin, Goldstar and White Triumph) of various morphological and physiological types, as well as cultivation methods (traditional – as control, PE – polyester film, PP – nonwoven). The fertilisation was maintained on a fixed level (organic – manure in the amount of 25 t. ha-1 in autumn, and mineral in spring, prior to planting, in the amount of: 80 kg N; 34.9 kg P; 99.6 kg K. ha-1). During vegetation, cultivation was carried out in accordance with normal agricultural practice. During harvest, medium-sized tuber samples were collected for chemical analyses, all sourced from 10 plants from each crop plot. The content of micro-elements (manganese, iron, copper, zinc) was determined with the use of atomic absorption spectroscopy. The research results were analysed statistically using one-way analysis of variance at a significance level p=0.05. The accumulation of micro-elements in sweet potato tubers was connected both to cultivar properties and to their reaction to under-cover cultivation methods. Of the micronutrients tested, sweet potato tubers contained the most iron, and the least copper. The highest content of copper was White Triumph, while the most abundant in manganese, iron and zinc was the Goldstar variety. [ABSTRACT FROM AUTHOR]