00285nam a22001097a 4500020001500000082001400015100001800029245003700047250001000084260004700094300003400141  a8122411991  222a631.4  aKolay, A. K.   aBasic concepts of soil science /  a2nd.   aNew Delhi,bNew Age International,cc2000.  axi, 256 p. ;bill. ;c24 cm.