00290nam a2200109Ia 450000500170000000800410001708200150005810000140007324500360008726000490012330000080017220260224041012.0260224s9999||||xx |||||||||||||| ||und||  a631.41 BYJ  aByju, G.  0aSoil chemistry : basic concepts  aNew Delhi: New India Publishers Agencyc2008  a249