Legumes - soybeans, peas, chickpeas - are valuable predecessors in crop rotation and important export crops. Their yield depends on the productivity of the nitrogen fixation process, which can be significantly influenced by fertilizers.
A specific feature of legumes is their need for molybdenum - a component of the enzymes nitrate and nitrite reductase, under the action of which oxidized forms of nitrogen NO2, NO3 must be transformed into reduced NH3 and NH2. Molybdenum deficiency is most often manifested on light soils and on acidified soils of gray forest and black soil types.
In soybeans, the process of nitrogen fixation, in symbiosis with nodule bacteria, begins in the phase of two true leaves, and therefore a sufficient supply of molybdenum to plants during this period is very important. For this purpose, the company "ECOORGANIC" advises to carry out foliar fertilization with microfertilizer ECOLINE Molybdenum (Complex) 0.5 - 1.0 l / ha (from the phase of 2 true leaves to budding). Weather conditions in May this year are not very favorable for legumes, so it is recommended to add ECOLINE Phosphite (K-Amino) 1.0 l / ha into the tank mix to reduce the negative impact of stressors.
Imbalance of mineral nutrition conditions leads to reduced yield and deterioration of its quality. Iron and zinc deficiency is possible on carbonate soils, and calcium deficiency - on acid soils. Symptoms of iron and zinc deficiency are visually manifested on soybean leaves in the form of interstitial chlorosis, which is the result of a complex violation of plant development on soils with an alkaline reaction and (or) high concentration of salts in the soil solution. Chlorosis can be exacerbated on over-compacted, wet soil and during cold spells. To eliminate the manifestations of iron and zinc deficiency, we propose to carry out foliar fertilization with ECOLINE Iron (Chelate), ECOLINE Zinc (Chelate) in the phase of the beginning of bean formation in doses of 0.5 - 1.0 l/ha.
With calcium deficiency, plants are delayed in growth, and fewer colonies of nitrogen-fixing bacteria (nodules) are formed on the roots. In addition, these nodules are smaller in size, have a lighter color in section, less active. On very acidic soils, nodules may not form at all. To eliminate calcium deficiency, we recommend applying a special fertilizer ECOLINE Calcium-Boron (Chelates) 1.5 - 2.0 l/ha in the budding phase.
The fullness of beans and, consequently, the yield of soybeans depends on the completeness of pollination of flowers, so at the beginning of the formation of beans it is advised to fertilize the plants with special fertilizers GROS Quitselium (1.0 - 1.5 l/ha) and ECOLINE Boron (Organic) 0.5 - 1.0 l/ha.
During the period of grain formation in beans, plants need enhanced nitrogen nutrition and a balanced supply of other macro and micronutrients. At this time, we recommend foliar fertilization with 5-6% urea solution in combination with ECOLINE Legumes (Chelates) at a dose of 1.5 - 2.0 l/ha. At the areas damaged by spider mites, together with acaricide, it is advisable to apply ECOLINE Magnesium (Chelates) 1.5 - 2.0 l/ha to stimulate the recovery of chlorophyll and intensify the process of photosynthesis.