TY - BOOK AU - Jha, Ratnesh Kumar. TI - Effect of Azospiril lum for Nitrogen Economy in Sweet Potato (Ipomoea batatas Lam.) / U1 - 633.492 PY - 1993/// CY - .- Pusa, samastipur PB - : RAU KW - Agronomy KW - Sweet Potato KW - Thesis KW - M. Sc ER -