References
- Giller , K. E. 2001 . Nitrogen Fixation in Tropical Cropping Systems. Wallingford , U.K. : CAB International .
- Hairiah , K. and van Noordwijk , M. 1989 . “ Root distribution of leguminous cover crops in the humid tropics and effects on a subsequent maize crop. ” . In Nutrient Management for Food Crop Production in Tropical Farming Systems Edited by: van der Heide , J. 157 – 170 . Haren , , The Netherlands : Institute for Soil Fertility .
- Kumwenda , J. D.T. , Waddington , S. R. , Snapp , S. S. , Jones , R. B. and Blackie , M. J. 1997 . “ Soil fertility management in the smallholder maize-based cropping systems of Africa. ” . In The Emerging Maize Revolution in Africa: The Role of Technology, Institution and Policy. , Michigan State University; U.S.A. 9–12 July, 1995 157 – 172 .
- Palm , C. A. , Gachengo , C. N. , Delve , R. J. , Cadisch , G. and Giller , K. E. 2001 . Organic inputs for soil fertility management in tropical agroecosystems: Application of an organic resource database . Agriculture, Ecosystems and Environment , 83 : 27 – 42 .
- Palm , C. A. , Nandwa , S. and Myers , R. J. 1997 . “ Combined use of organic and inorganic nutrient sources for soil fertility maintenance and nutrient replenishment. ” . In Replenishing Soil Fertility in Africa Edited by: Buresh , R. J. and Sanchez , P. A. 193 – 217 . Madison, Wisconsin , , U.S.A. : ASS A, CSSA, SSSA .
- Palm , C. A. and Sanchez , P. A. 1991 . Nitrogen release from the leaves of some tropical legumes as affected by their lignin and polyphenolic contents . Soil Biology and Biochemistry , 23 : 83 – 88 .
- Payne , R. W. 1978 . Genstat 5 Reference Manual Oxford , U.K. : Clarendon Press .
- Sakala , W. D. 2000 . “ A review of potential legumes for integrated nutrient management in maize-based systems in Malawi with emphasis on pigeonpeas. ” . In Integrated Crop Management Research in Malawi Edited by: Ritchie , J. M. 234 – 238 . Chatham , U.K. : Natural Resources Institute .
- Sakala , W. D. , Cadisch , G. and Giller , K. E. 2000 . Interactions between residues of maize and pigeonpea and mineral N fertilizers during decomposition and N mineralization . Soil Biology and Biochemistry , 32 : 679 – 688 .