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ISRN Agronomy
Volume 2012 (2012), Article ID 153412, 7 pages
http://dx.doi.org/10.5402/2012/153412
Research Article

Constraints to On-Farm Maize (Zea mays L.) Seed Production in Western Kenya: Plant Growth and Yield

1Kenya Agricultural Research Institute, National Genebank of Kenya, P.O. Box 30148-00100, Nairobi, Kenya
2School of Agriculture and Biotechnology, Karatina University College, P.O. Box 1957-10101, Karatina, Kenya
3Department of Seed, Crop and Horticultural Sciences, Chepkoilel University College, P.O. Box 1125-30100, Eldoret, Kenya

Received 12 April 2012; Accepted 18 June 2012

Academic Editors: J. Hatfield, G. C. Heathman, and M. A. Taboada

Copyright © 2012 P. W. Wambugu et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Studies have shown that that about 85% of maize farmers in Western Kenya plant local varieties with about 80% using own farm-saved seeds. The production system is characterized by late harvesting, heavy striga infestation, use of local varieties, and low-soil fertility. The objective of this study was to test an on-farm seed production system which would help improve yield and quality of farm saved seeds. The trials were set up in a factorial design fitted as random complete block design. There were 3 factors each at 2 levels: time of harvest, variety choice, and fertilizer application. Fertilizer application led to an 88% increase in yield, 54% increase in number of seeds per cob, and 14% increase in 100-seed weight. Fertilizer application also led to an increase in seed vigour and viability. Yield differences between the 2 varieties were not significant. The correlation between 100-seed weight and seed vigour was significant showing that heavy seeds were more vigourous. Nitrogen application was therefore recommended for increasing yields and for producing vigourous seeds but should be done with caution to avoid lodging as witnessed. This study also noted that farmers are rational and their decisions are usually based on strong economic considerations.