The scheme of foliar soy nutrition

Peculiarities of feeding grain legumes (soy, pea) 

The cultures are close in their biological peculiarities except their susceptibility to temperatures. Pea is sown at minimal temperatures and soy is sown when the soil warms until at least +10°C. Both cultures are able to bond nitrogen from soil air due to symbiosis with Bradyrhrizobium japonicum bacteria. Both cultures require fertile soil with neutral reaction. The key elements of their nutrition are phosphorus, potassium, calcium, magnesium, sulphur, molybdenum, zinc and ferrum on carbonate soils. Soy has increased absorption of nitrogen, potassium, calcium, ferrum, mangan, zinc compounds, but the absorption of phosphorus and sulphur compounds from soil is not high and comprises 30 and 20 kg per ha respectively. From the blooming stage the grain legumes actively absorb macro elements. The critical stage of soy for the nitrogen compounds is 2-3 weeks after blooming, phosphorus compounds – the first month of vegetation. The soy's need for micro-nutrients grows when using increased dosage of main elements of mineral nutrition (N, P, K) and meso elements (Mg, S, Ca) and depends on the soil conditions. For soy and pea, fertilizers with micro-nutrients are used for pre-sowing seed treatment and by foliar feeding in critical stages for prevention or according to the results of the functional diagnostics.