Effects of Foliar Application of Nitrogen and Molybdenum on the Uptake of Nitrogen, Seed Yield and Its Quality of Soybeans (Glycine max (L.) Merr.)

Abstract

Effects of foliar nutrition of soybeans (cv.PB-I) with nitrogen and molybdenum on the seed yield and its quality are reported. Nitrogen uptake was positively affected by the foliar application of nitrogen. Foliar applcation of 1% ammonium nitrate solution (30kgN/ha) during the early pod-fill period has significantly increased the seed yield and the % protein in seeds. This effect was further enhanced by incorporation of 0.05%ammonium molybdate in the spray solution. Application of nitrogen: 3.0kgN/ha at two leaves tV22), 15kgN/ha at early flowering (RI-R2) and 30kgN/ha at early pod-fill (R4-R5) periods had a better effect on the seed yield and the % protein in seeds. The highest seed yield (1727 kg/ha), protein yield (703.4 kg/ha) and fats (351.6 kg/ha) were recorded in the fertilizer treatment where nitrogen was applied together with molybdenum at all three stages of growth.