To Evaluated the Effect of Oxalic Acid Industry Waste Treated Rock Phosphate with Native and Applied Phosphorus on Growth, Phosphorus Use Efficiency and Yield of Soybean

Abstract

A field experiment was taken on soybean with the treament of
increasing levels of phosphorus added through single superphosphate
(SSP) ,  rock phosphate (RP) and rock phosphate treated with
oxalic acid industry waste (RP + OAIW) at J.N. Krishi Vishwavidyalaya
Research Farm. The results showed that applicationo
of 40 kg P₂O₅ ha^-1 (RP) mixed with OAIW proved to be superior
and beneficial in increasing the grain yield as compared to control
and over rest of the treatments.
The maximum net return (Rs 9170.00 ha^-1 ) over control and
cost benefit ratio (1 : 2.88) was achieved in the application of 40 kg
P₂O₅ ha^-1 (RP) + OAIW (T4). No harmful effect of OAIW was
observed on plant growth as well as on soil health during the entire
life cycle of crop.