Effect of Organic and Inorganic Nitrogen and Biofertilizer on Nutrient Content and Uptake by Amaranthus (Amaranthus hypochondriacus L.)

A field experiment study was conducted on loamy sand soil of the S.D. Agricultural University, Sardar Krushinagar indicated that fertilizing the crop with 75 % RDN (urea) + 25% (gliricidia) with Azotobacter gave highest crude protein. The N, P, K S, Fe and Zn content were higher in treatment where 50 or 25 % recommended dose of nitrogen was applied through organic sources (FYM, gliricidia compost). The maximum removal of N, P and Fe by both grain and stover and K by grain were noted by application of 75 % RDN (urea) + 25% gliricidia compost with Azotobacter. While, highest uptake of K by stover, S by grain and stover were noted 50-50 % RDN applied through urea and gliricidia compost and 75 % RDN through urea + 25 % RDN through FYM + Azotobacter (T₈), treatments, respectively. While, the maximum uptake of Zn by both grain and stover were recorded by 75 % RDN through urea + 25 % RDN through gliricidia compost (T₆).