00663 a2200193 4500 49540 49540 WUSLLib 161110b xxu||||| |||| 00| 0 eng d 631.81 SIL De Silva, M. A. T. 169 Mineral nutrition of plants Colombo National Science Council 1980 1980 vi,54p. 23cm Science education series No. 1 170 Agriculture and related technologies 171 Nutritive principles,complete fertilizers, methods of application 172 Fertilizers,soil conditioners,growth regulators 173 Specific techniques 174 L ddc 0 0 ddc 0 0 LEN MKDL MKDL LEN 2009-08-12 0 631.81 DES 52629 2009-08-12 00:00:00 0.00 2016-10-31 L