An evaluation of cation exchange capacity methods for acid tropical soils

le Ishak, Cek Fauziah, I., Jamilah, Syed Rastan, Syed Omar
Foilsithe 1997

Dissolution of ground basalt and its effect on oxisol chemical properties and cocoa growth

le Anda, Markus, Jusop, Shamsuddin, Ishak, Cek Fauziah, Syed Rastan, Syed Omar
Foilsithe 2009