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Soil Conservation Effectiveness and Crop Productivity of Forage Legume Intercropping, Contour Grass Barriers and Contour Ridging in Cassava on Andean Hillsides

Published online by Cambridge University Press:  03 October 2008

D. E. Leihner ,
M. Ruppenthal ,
T. H. Hilger  and
J. A. Castillo F.
D. E. Leihner
Affiliation:
Institut für Pflanzenproduktion in den Tropen und Subtropen Universität Hohenheim, 70593 Stuttgart, Germany
M. Ruppenthal
Affiliation:
Institut für Pflanzenproduktion in den Tropen und Subtropen Universität Hohenheim, 70593 Stuttgart, Germany
T. H. Hilger
Affiliation:
Institut für Pflanzenproduktion in den Tropen und Subtropen Universität Hohenheim, 70593 Stuttgart, Germany
J. A. Castillo F.
Affiliation:
Centro Internacional de Agricultura Tropical (CIAT), Apartado Aereo 6713, Cali, Colombia
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Summary

Soil erosion and the productivity of cassava (Manihot esculenta Crantz) cropping systems, including forage legume intercropping, were monitored under natural rainfall conditions on Inceptisols in southwest Colombia. Trials were conducted over two cropping periods on moderate slopes. The best erosion control and cassava fresh root yields were achieved by sole cropping on contour ridges. Erosion was greater with forage legume intercropping than with cassava sole cropping in the first cropping period but once well established and uniformly distributed, undersown legumes controlled erosion effectively, though yields of cassava were depressed by 40% or more. Dense stands of grass contour barriers decreased erosion to tolerable levels. Lower cassava yields due to reduced cropping area and competition from the grasses could be compensated for by the production of valuable forage and by increasing cassava planting density.

Type
Research Article
Information
Experimental Agriculture , Volume 32 , Issue 3 , July 1996 , pp. 327 - 338
Copyright
Copyright © Cambridge University Press 1996

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References

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