An evaluation of cation exchange capacity methods for acid tropical soils

nork Ishak, Cek Fauziah, I., Jamilah, Syed Rastan, Syed Omar
Argitaratua 1997

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

nork Anda, Markus, Jusop, Shamsuddin, Ishak, Cek Fauziah, Syed Rastan, Syed Omar
Argitaratua 2009