By sowing legume in the rotation, it is possible to achieve profitable organic production. Soybean is a protein - oil plant, high nutritional value. Soybean proteins are rich in essential amino acids. Soybeans are also used as an important source of phytoestrogens and isoflavones, contains significant quantities of B-complex vitamins, beta-carotene and minerals (calcium, iron and potassium).
Soybean as legumes raises the fertility of the soil, by binding the nitrogen from the air, and by soybean crop residue, soil enriches in nutrients. Due to the large agro-technical character, cultivation of soybean in crop rotation is very important in organic cropping system. The breakeven point of soybean production is about 1 t ha-1. In Serbia, the average grain yield were 2.5 t ha-1. Profitable soybean production is achieved by applying appropriate growing technology, a proper selection of varieties and control of production costs.
In 2016, on the organic plots of Institute of Field and Vegetable Crops, an experiment with soybeans early varieties was performed.
The varieties NS Kaća (000 MG, with white grain), NS Pantera and NS Blackstar (00 MG, with black seed coats) were tested and high yields of seed were achieved.
Variety had a significant effect on the tested morphological productive characteristics of soybean.
The largest mass and the height of plants had a variety NS Pantera (50.29 g; 140.22 cm). NS Blackstar had the largest height of the first pod (7.67 cm) and variety NS Kaća had the highest 1000 grain weight (240.16 g).