Purpose. Jute mallow (Corchorus olitorius L.) is a mucilaginous vegetable and fiber crop cultivated in the tropics, where catnip (Nepeta cataria L.) and Mexican sunflower (Tithonia diversifolia L.) are common weeds. Hence, the study investigated the growth, yield, and nutrient level of jute mallow in weed-free, catnip, and Mexican sunflower environments. Methods. The study involved two screen-house experiments in a Completely Randomized Design (CRD) with six replications. The treatments were 0 (control), 2, 4, 6, 8, and 10 weed plants per pot in both experiments. These are 0, 100, 200, 300, 400, and 500 weed count per square meter equivalent, based on the surface area of the pots used. Mexican sunflower and catnip plants interacted with jute plants in the first and second experiments, respectively. Growth parameters of jute mallow were recorded weekly from 5 to 8 weeks after sowing (WAS), and harvesting was done at 8 WAS. The proximate composition of jute was evaluated using standard procedures outlined by AOAC. The data collected were subjected to analysis of variance (ANOVA), and means were separated using Duncan Multiple Range Test (DMRT) at P < 0.05. Results. Catnip and Mexican sunflower negatively impacted the morphological features of jute mallow from 100 plants per square meter upwards. Catnip and Mexican sunflower, at 300 and 100–500 plants per square meter, respectively, reduced the dry weight of jute mallow. The crude protein content of jute mallow was also lessened by Mexican sunflower at some point. Conclusions. The study recommends that the density of catnip and Mexican sunflower plants interacting with jute mallow should be maintained below 100 plants per square meter to prevent yield loss.

Purpose. Determine the main indicators of productivity and quality of seeds of spring rapeseed new varieties during their cultivation in different argoclimatic zones of Ukraine. Methods. Field, laboratory. Field studies were carried out on the basis of the Branches of the Ukrainian Institute for Plant Variety Examination in the zones of Polissia, Forest-Steppe and Steppe in 2015–2016. Results. The State Regis­ter of Plant Varieties Suitable for Distribution in Ukraine (the Register of Plant Varieties of Ukraine) as at 22 August 2019 contains 60 varieties of spring rapeseed, of which 42 (70.0%) are of foreign origin and 18 (30.0%) are Ukrainian cultivars. The maximum sown area in Ukraine occupied by spring rapeseed was about 68.3 thousand ha in 2018, which is twice as much as the area of 2013. In 2019, a dramatic decrease in sown area was observed. The productivity of the studied rapeseed varieties in 2015–2016 in the Steppe zone was on average 0.94–1.17 t/ha; Forest-steppe – 2.16–2.29; Polissia – 1.33–1.62. The yields of individual varieties exceeded 2.0 t/ha; they had a high content of oil and crude protein and a low content of erucic acid and glucosinolates in the seeds. The content of erucic acid did not exceed 0.1%, glucosinolates – 0.8%. Conclusions. The highest yield in the zones of Forest-Steppe and Polissia was observed from ‘DK 7160 KL’ variety – 2.28 t/ha and 1.62 t/ha, respectively. The maximum crude protein content in the steppe zone was found in ‘Aksana’ variety (26.6%), in the Forest-steppe zone – in ‘Bilder’ (25.4%,) in the Polissia zone – in ‘Sander’ (24.9%). High oil content in seeds in the Steppe zone was in varieties ‘Bilder’ (45.0%) and ‘DK 7155 KL’ (45.2%), in the Forest-Steppe – in ‘Sander’ (46.5%) and ‘DK 7155 KL’ (46.6%); in Polissia – in ‘DK 7160 KL’ (47.1%) and ‘DK 7155 KL’ (46.8%). The minimum content of erucic acid in the seeds of spring rapeseed in the Steppe was in the varieties ‘Aksana’ and ‘DK 7150 KL’, in the Forest-Steppe – ‘GK 7160 KL’, ‘CLICK KL’, ‘DK 7155 KL’ and in the Polissia zone – ‘DK 7160 KL’ and ‘DK 7150 KL’. | Мета. Визначити основні показники продуктивності та якості насіння нових сортів ріпаку ярого за вирощування їх у різних аргокліматичних зонах України. Методи. Польовий, лабораторний. Польові дослідження проводили на базі Філій Українського інституту експертизи сортів рослин у 2015–2016 рр. в зоні Полісся, Лісостепу та Степу. Результати. У Державному реєстрі сортів рослин, придатних для поширення в Україні (Реєстр сортів рослин України) станом на 22.08.2019 р. міститься 60 сортів ріпаку ярого типу розвитку, з яких 42 (70,0%) – іноземної селекції та 18 (30,0%) – вітчизняної селекції. Максимальна посівна площа в Україні зайнята ріпаком ярим була в 2018 році на рівні 68,3 тис. га, що вдвічі більше площ 2013 року. У 2019 році спостерігалось кардинальне зниження посівних площ. Урожайність досліджуваних сортів ріпаку за 2015–2016 рр. у зоні Степу була в середньому 0,94–1,17 т/га; Лісостепу – 2,16–2,29; Поліссі – 1,33–1,62. Урожайність окремих сортів перевищувала 2,0 т/га, вони мали високий вміст олії та сирого протеїну і низький вміст ерукової кислоти та глюкозинолатів у насінні. Вміст ерукової кислоти не перевищував 0,1%, глюкозинолатів – 0,8%. Висновки. Максимальна урожайність у зонах Лісостепу і Полісся була в сорту ‘ДК 7160 КЛ’ – 2,28 т/га та 1,62 т/га відповідно. Максимальний вміст сирого протеїну в Степовій зоні встановлено в сорту ‘Аксана’ – 26,6%, у зоні Лісостепу в ‘Білдер’ – 25,4%, у зоні Полісся в ‘Сандер’ – 24,9%. Високий вміст олії в насінні в зоні Степу формували сорти: ‘Білдер’ – 45,0% та ‘ДК 7155 КЛ’ – 45,2%, у Лісостепу ‘Сандер’ – 46,5% та ‘ДК 7155 КЛ’ – 46,6%; у Поліссі ‘ДК 7160 КЛ’ – 47,1% та ‘ДК 7155 КЛ’ – 46,8%. Мінімальний вміст ерукової кислоти в насінні ріпаку ярого у Степу був у сортів – ‘Аксана’, ‘ДК 7150 КЛ’, у Лісостепу – ‘ДК 7160 КЛ’, ‘КЛІК КЛ’, ‘ДК 7155 КЛ’ та в зоні Полісся – ‘ДК 7160 КЛ’, ‘ДК 7150 КЛ’. | Цель. Определить основные показатели продуктивности и качества семян новых сортов рапса ярового при выращивании их в разных аргоклиматических зонах Украины. Методы. Полевой, лабораторный. Полевые исследования проводили на базе Филиалов Украинского института экспертизы сортов растений в 2015–2016 гг. в зоне Полесья, Лесостепи и Степи. Результаты. В Государственном реестре сортов растений, пригодных для выращивания в Украине (Реестр сортов растений Украины) по состоянию на 22.08.2019 г. содержится 60 сортов рапса ярового типа развития, из которых 42 (70,0%) – иностранной селекции и 18 (30,0%) – отечественной селекции. Максимальная посевная площадь в Украине, занятая рапсом яровым, была в 2018 году на уровне 68,3 тыс. га, что вдвое больше площадей 2013 года. В 2019 году наб­людалось кардинальное снижение посевных площадей. Урожайность изучаемых сортов рапса в 2015–2016 гг. в зоне Степи была в среднем 0,94–1,17 т/га, Лесостепи – 2,16–2,29, Полесье – 1,33–1,62. Урожайность отдельных сортов превышала 2,0 т/га, они имели высокое содержание масла и сырого протеина и низкое содержание эруковой кислоты и глюкозинолатов в семенах. Содержание эруковой кислоты не превышало 0,1%, глюкозинолатов – 0,8%. Выводы. Максимальная урожайность в зоне Лесостепи и Полесья была у сорта ‘ДК 7160 КЛ’ – 2,28 и 1,62 т/га соответственно. Максимальное содержание сырого протеина в Степной зоне установлено у сорта ‘Аксана’ – 26,6%, в зоне Лесостепи –‘Билдер’ – 25,4%, в зоне Полесья – ‘Сандер’ – 24,9%. Высокое содержание масла в семенах в зоне Степи формировали сорта: ‘Билдер’ – 45,0% и ‘ДК 7155 КЛ’ – 45,2%, в Лесостепи ‘Сандер’ – 46,5% и ‘ДК 7155 КЛ’ – 46,6%, в Полесье ‘ДК 7160 КЛ’ – 47,1% и ‘ДК 7155 КЛ’ – 46,8%. Минимальное содержание эруковой кислоты в семенах рапса ярового в Степи было у сортов: ‘Аксана’, ‘ДК 7150 КЛ’, в Лесостепи: ‘ДК 7160 КЛ’, ‘КЛИК КЛ’, ‘ДК 7155 КЛ’ и в зоне Полесья: ‘ДК 7160 КЛ’, ‘ДК 7150 КЛ’.

Purpose. Determine the main indicators of productivity and quality of seeds of spring rapeseed new varieties during their cultivation in different argoclimatic zones of Ukraine. Methods. Field, laboratory. Field studies were carried out on the basis of the Branches of the Ukrainian Institute for Plant Variety Examination in the zones of Polissia, Forest-Steppe and Steppe in 2015–2016. Results. The State Regis­ter of Plant Varieties Suitable for Distribution in Ukraine (the Register of Plant Varieties of Ukraine) as at 22 August 2019 contains 60 varieties of spring rapeseed, of which 42 (70.0%) are of foreign origin and 18 (30.0%) are Ukrainian cultivars. The maximum sown area in Ukraine occupied by spring rapeseed was about 68.3 thousand ha in 2018, which is twice as much as the area of 2013. In 2019, a dramatic decrease in sown area was observed. The productivity of the studied rapeseed varieties in 2015–2016 in the Steppe zone was on average 0.94–1.17 t/ha; Forest-steppe – 2.16–2.29; Polissia – 1.33–1.62. The yields of individual varieties exceeded 2.0 t/ha; they had a high content of oil and crude protein and a low content of erucic acid and glucosinolates in the seeds. The content of erucic acid did not exceed 0.1%, glucosinolates – 0.8%. Conclusions. The highest yield in the zones of Forest-Steppe and Polissia was observed from ‘DK 7160 KL’ variety – 2.28 t/ha and 1.62 t/ha, respectively. The maximum crude protein content in the steppe zone was found in ‘Aksana’ variety (26.6%), in the Forest-steppe zone – in ‘Bilder’ (25.4%,) in the Polissia zone – in ‘Sander’ (24.9%). High oil content in seeds in the Steppe zone was in varieties ‘Bilder’ (45.0%) and ‘DK 7155 KL’ (45.2%), in the Forest-Steppe – in ‘Sander’ (46.5%) and ‘DK 7155 KL’ (46.6%); in Polissia – in ‘DK 7160 KL’ (47.1%) and ‘DK 7155 KL’ (46.8%). The minimum content of erucic acid in the seeds of spring rapeseed in the Steppe was in the varieties ‘Aksana’ and ‘DK 7150 KL’, in the Forest-Steppe – ‘GK 7160 KL’, ‘CLICK KL’, ‘DK 7155 KL’ and in the Polissia zone – ‘DK 7160 KL’ and ‘DK 7150 KL’.

Purpose. To determine the patterns of influence of gro­wing factors on the economically valuable characteristics of new soybean varieties. Methods. Field, biochemical methods, analysis of variance. Results. The rates of the influence of the growing zone, the conditions of the growing season of the year and the soybean variety on the yield, weight of 1000 seeds, the content of crude protein and oil, and protein and oil collection were determined. The greatest influence on the yield of the studied varieties had a growing zone – 55%. On average the maximum yield was obtained in Forest-steppe zone 2.48–3.58 t/ha, the lowest – in Steppe zone (1.33–1.89 t/ha) for 2017–2018. In the same period the weight of 1000 seeds on average was 125.1–169.9 g in the Steppe zone, in Forest-Steppe zone it was 130.2–207.8 g and 143.9–188.0 g in Fo­rrest zone. According to the results of analysis of variance, it was determined that the growing zone has the greatest influence on weight of 1000 seeds – 31%, variety – 21% and conditions of the growing season of the year – 13%. The main characteristics of soybean quality are the content of crude protein and oil in seeds. The highest level of crude protein was observed in soybean variety in Forest-Steppe zone – 37.5–44.0%. In Forrest zone, the crude protein content was 34.4–41.7%, in the Steppe zone 35.4–40.1%. The maximum level of this characteristic was observed in variety ‘NS Diyana’ – 44.0% in Forest-Steppe zone, in Forrest zone – in the variety ‘Alexa’ 41.7%, in Steppe zone – in variety ‘NS Diyana’ 40.1%. Thus, the growing zone (31%) and variety (25%) had the greatest influence on the content of crude protein; the interaction of factors (variety and growing zone) affected 17%. The average oil content for 2017‑2018 ranges from 19.8 to 24.2%. High oil content was noted in ‘Adsoy’ variety in Forrest and Forest-Steppe zones, 24.2 and 22.6%, respectively, and ‘Azimut’ – 23.8% in Steppe zone. The results of the analysis of variance showed that the growing zone to a greater extent affected the oil content in soybean seeds by 25%, variety – 21%, and the interaction of factors of the variety and gro­wing zone by 21%. Conclusions. According to the results of multifactor analysis of variance, it was determined that the growing zone had the greatest influence on the studied parameters. It was found that the rate of the influence of gro­wing zone of soybean varieties is 25–55%, depending on the studied characteristic. It was determined that the influence of the variety was 4–25%, the conditions of the growing season affected by 1–26%.