1. The carbon and nitrogen contents of some natural covers;Akhurst;J. Rubber Res. Inst. Malays.,1932
2. Effect of various covers on the performance of Elaeis guineensis Jacq. on different soils;Broughton,1976
3. Development of the nitrogen fixing apparatus in tropical legumes;Broughton;Aust. J. Plant Physiol.,1977
4. Effect of Centrosema pubescens Benth. on soil fertility in the humid tropics;Bruce;Queensl. J. Agric. Anim. Sci.,1965
5. Manuring in relation to soil series in West Malaysian mature rubber growing plantations;Chan,1972