Influence of phosphorus fertilizers on the yield of soybean varieties in the conditions of Uzbekistan

Abstract

Soybean varieties are being studied in Uzbekistan, and cultivation technologies are being improved and new ones are being created. In this research, the effect of phosphorus fertilizers on soybean varieties was studied in the conditions of meadow-swamp soils of Tashkent region. The field experiments were carried out in 4 rows, the piles were 20 m long, 3.6 m wide, with 6 rows, of which 2 rows were marked in the middle and 4 rows were marked as protective rows at the edges. The results showed that when the norm of nitrogen and potassium-based phosphorus fertilizers was 80 kg, the leaf surface averaged 42.6 thousand m2/ha in the Nafis variety. In the second variant, when the phosphorus content was increased to 40 kg, the leaf surface was found to be 2,000 m2/ha higher. In the Vilana variety, the leaf surface area was 42.4 thousand m2/ha at low phosphorus levels, while the leaf surface was found to be 2.2 thousand m2/ha when the phosphorus level was increased by 40 kg.