Innovatsiyalar vazirligi termiz agrotexnologiyalar va innovatsion rivojlanish

The purpose and objectives of the research. It is to study the rate of 
feeding with nitrogen fertilizers and to determine the effect of biological 
preparation in the cultivation of "Nafis" soybean variety in the conditions of the 
growing barren soils of Surkhandarya region. 
In the implementation of this goal, we have defined the following tasks: 

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- to determine the effect of the applied nitrogen fertilizer rate and inoculant 
("Rizovit" milk-colored powder) on the change in the amount of NPK in mobile 
form in the barren soils that are becoming grassy; 
- to determine the effect of nitrogen fertilizer rate and inoculant ("Rizovit" 
milk-colored powder) on the growth and development of soybeans; 
- determining the effect of nitrogen fertilizer rate and inoculant ("Rizovit" 
milky powder) on the number and mass of nodules in soybean root; 
- determining the effect of nitrogen fertilizer rate and inoculant ("Rizovit" 
milky powder) on soybean yield and quality indicators; 
- to determine the economic efficiency of nitrogen fertilizer and inoculant 
("Rizovit" milk-colored powder) used in soybeans. 
Research object and subject. As a research object, a barren soil that is 
getting grassy, Soya variety "Nafis", mineral fertilizers and biological preparation 
"Rizovit-AKS" were taken. The development of soybean growth in the conditions 
of barren soils, which are becoming grassy, and the effect of mineral fertilizers and 
biological preparations on it serve as the subject of research. 
Scientific news. In the conditions of barren soils becoming grassy, nitrogen 
fertilizers (40 kg/ha) and biological preparation (Rizovit) are applied against the 
background of phosphorus (90 kg/ha) and clay (60 kg/ha) fertilizers in the shade. 
the method of application is scientifically based; 
The effect of mineral fertilizers and biological preparations on the dynamics 
of ammonium and nitrate nitrogen, mobile phosphorus and exchangeable 
potassium in the conditions of barren soils that are becoming grassy was 
determined, and the amount of ammonium and nitrate nitrogen at the end of the 
season was 29.7 and 35.4 mg, respectively. /kg, and the amount of mobile 
phosphorus and exchangeable potassium was 35.5 and 282 mg/kg; 
The positive effect of mineral fertilizers and biological preparations on the 
growth and development, productivity and quality indicators of soybean variety 
"Nafis" in the conditions of barren soils, which are becoming grassy, is based on 
scientific and theoretical aspects.