Working Document Series Open Access 2012 RUF-31920

Effect of different tillage methods on soil moisture Dynamics in Maize-bean Cropping Systems in Semi Arid Mwala District, Kenya

N. AmuriC.K.K. GacheneA.N. KarumaP.W. Mtakwa

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Abstract

193 words

Water is an important factor affecting plant growth especially in semi arid areas. A study to determine the effects of tillage and cropping systems on soil surface roughness, moisture storage and maize and bean yields was conducted in semi arid Mwala District, Kenya. Five tillage systems: mouldboard (MB), mouldboard and harrowing (MBH), ox-ploughing (OX), hand hoe and tied-ridges (HTR) and hand hoe only (H) and, three cropping systems; sole maize, sole bean and maize-bean intercrop, were investigated in a split-plot design with four replicates. Soil moisture varied significantly (p<0.05) among the tillage methods at 2 and 4 weeks after planting (WAP). Groundcover was significantly different (p<0.05) among the cropping systems at 4 WAP and both tillage and cropping system at 6 WAP with the highest being observed in the maize-bean intercrop. Maize plant height was significantly different (p<0.05) among the tillage methods, with the highest height (78 -180 cm) in the MBH plots across the different WAPs. Preliminary results demonstrate that tillage methods influence the level of soil moisture conservation and crop growth in the semi arid areas of Kenya where most of the soils are prone to crusting and formation of hardpans

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