J. Kowal

发表

Agricultural ecology of savanna: A study of West Africa

A. Kassam, J. Kowal, 1979 .

Nutrient content of the moist tropical forest of Ghana

D. Greenland, J. Kowal, 1960, Plant and Soil.

Agricultural ecology of Savanna.

A. Kassam, J. Kowal, 1978 .

Water use, energy balance and growth of gero millet at samaru, northern Nigeria

A. Kassam, J. Kowal, 1975 .

An agroclimatological atlas of the northern states of Nigeria : with explanatory notes

J. Kowal, D. Knabe, 1972 .

Pattern of water availability and water requirement for grain sorghum production at Samaru, Nigeria.

D. Andrews, J. Kowal, 1973 .

Water use, energy balance and growth of maize at Samaru, northern Nigeria

J. M. Kowal, A. H. Kassam, A. Kassam, 1973 .

Some physical properties of soils at Samaru, Zaria, Nigeria: storage of water and its use by crops. 3. Seasonal pattern in soil water changes under various vegetation covers and bare fallow.

J. Kowal, 1970 .

Maize in West Africa: and its potential in savanna areas

A. Kassam, M. N. Harrison, J. Kowal, 1975 .

Improving food crop production in the Sudan Savanna zone of Northern Nigeria

A. Kassam, F. Khadr, J. Kowal, 1976 .

RAINFALL IN THE SUDAN SAVANNA REGION OF NIGERIA

A. Kassam, J. Kowal, 1975 .

A simple device for analysing the energy load and intensity of rainstorms

J. M. Kowal, W. Kijewski, A. H. Kassam, 1973 .

Some physical properties of soil at Samara, Zaria, Nigeria: storage of water and its use by crops. I. Physical status of soils.

J. Kowal, 1970 .