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Bringing the Green Revolution to the shifting cultivator
Greenland, D. J., (1975)
An optimization model for evaluating the stability of sole cropping and mixed cropping systems under changing resource and technology levels
Ogunfowora, O., (1973)
The rationalisation of intercropping
Norman, D. W., (1976)
Inter-disciplinary research on rural development : the experience of the Rural Economy Research Unit in Northern Nigeria
Norman, David W., (1974)
Economic rationality of traditional Hausa Dryland farmers in the North of Nigeria
Norman, David W., (1977)
Labour inputs of farmers : a case study of the Zaria Province of the North-Central State of Nigeria
Norman, David W., (1969)