Risk of soil compaction under the action of heavy agricultural tractor wheel on alfisols in West-Cameroon? Effect on the yield of maize Zea mays L. and groundnut Arachis hypogaea L. in sole and intercropped systems
1993
Lawane, G. (Departement des Productions Vegetales, Dschang (Cameroon))
The aim of the study was to see if eventual negative effects of soil compaction on alfisols in Bansoa could be observed under the normal tillage conditions. The following parameters were studied: the apparent and actual soil densities of tilled and non compacted and tilled and compacted soils, the yields of maize and groundnuts as sole and intercropped plots, root development of maize and leaves and stem growth of maize and groundnuts, and the effect of the preemergence herbicide (Stomp) on weeds. Under the normal soil tillage conditions in the beginning of the rainy season soil compaction values were not higher than the natural ones. Grain yields, stem height, leaf length of maize and groundnuts as well as root development were not significantly influenced by the type of soil treatment. The values of land equivalent ratios (LER), 1.77 and 1.88 on tilled soil with compaction and on tilled soil without compaction respectively showed an advantage of intercropping as compared to the sole culture. The pre-emergence herbicide (Stomp) had some effect on weeds except on Cyperus sp.
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