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An Agro-Economic Analysis of Field Trials from a Farming Systems Research Perspective: Weed Control in Rainfed Lowland Rice in Senegal

Published online by Cambridge University Press:  03 October 2008

Joshua L. Posner  and
Eric W. Crawford
Joshua L. Posner
Affiliation:
University of Wisconsin, Madison, Wisconsin, USA
Eric W. Crawford
Affiliation:
Michigan State University, East Lansing, Michigan, USA
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Summary

Using a farming systems approach, a multidisciplinary team in southern Senegal examined three strategies for weed control in rainfed lowland rice: use of herbicide; replacement of broadcast seeding by row seeding with mechanical seeders; and transplanting compared with direct seeding of rice. Thorough evaluation of the agronomic and economic benefits of these strategies for farmers was facilitated by supplementing the standard analysis of on-farm trials with multivariate analysis incorporating agronomic survey data to explain treatment effects better, and by considering technical and economic effects throughout the farming system. The agro-economic analysis led the team to conclude that: where soils are productive, herbicide use is a profitable investment; when converting to direct seeding, farmers should facilitate weeding by seeding in rows with a mechanical seeder; and transplanting should not be discouraged in areas where it is still feasible, since it is less time-consuming, fits in better with other farm activities and requires less fertilizer.

Type
Research Article
Information
Experimental Agriculture , Volume 27 , Issue 3 , July 1991 , pp. 231 - 241
Copyright
Copyright © Cambridge University Press 1991

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References

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