00276nam a2200109Ia 450000500170000000800410001708200120005810000170007024500280008726000430011530000080015820260224040957.0260224s9999||||xx |||||||||||||| ||und||  a630 RED  aReddy, S.R.  0aPrinciples of agronomy.  aLudhiana : Kalyani Publications c2004  a543