Fertility of Leached Chernozem and Productivity of Winter Wheat Depending on Fertilizers in a Forest-steppe Zone

The study revealed optimum doses, NPK combinations, terms and methods of fertilizer application, which provides for highly efficient use of nutrients thus maintaining the fertility of soils, high efficiency and high quality of winter wheat grains. The application of some mineral fertilizers was followed by some decrease (trend) of humus content in relation to control samples. The option manure+NPK was characterized by relative stabilization of humus condition of soil, and concerning the average humus content this option exceeded the control one by 0.32 %. Fertilizers clearly improved the nutrient status of leached chernozem under winter wheat enriching its 0–40 cm layer with mobile nitrogen (NН4+ and NO3−), phosphorus and potassium respectively by 6.0–9.2; 3.2–9.4; 9.3–36.7 and 21.5–32.8 mg/kg of soil on average per vegetation. Options with high doses of mineral fertilizers were characterized by the largest content. The application of fertilizers under winter wheat in N50−150P40−120K40−120 doses increased grain yield from 0.22 to 2.32 t/ha (6.9–72.5 %). The estimated option was the best

The effect of potassium humate and micronutrients on the yield of cucumber fruits in greenhouse conditions

A hybrid Svyatogor F1 of Dutch breeding was grown in a winter greenhouse for three turns. Studies have shown that pre-sowing seed soaking treatment and foliar top dressing of plants with potassium humate did not affect germination, but positively affected plant growth, except for lithium carbon dioxide. For potassium humate and PABA, the leaf area increased, while for lithium it decreased. Micro fertilizers, except lithium, had a positive effect on the formation of fruits, their weight and yield. The largest yield of cucumbers was obtained by PABA and potassium humate mixed with other trace elements: 33.63 and 34.0 kg/m2 with a control indicator of 30.75 kg/m2. One foliage fertilization with micro fertilizers also had a positive effect: in terms of yield, the variant of a mixture of all fertilizers was in the first place - 34.75, the PABA with a yield of 33.93 kg/m2 was in the second place, and 30.97 kg/m2 were in the control. Lithium had a retarding effect on all indicators