Crop productivity using forage legumes and grasses as contour hedgerows species in an acid upland soil
1999
Mercado, A.R. | Sanchez, N. | Garrity, D.P. (Misamis Oriental State Coll. of Agriculture and Technology, Claveria, Misamis Oriental (Philippines))
Among the hedgerows species used in the study, Flemingia congesta, Vetiveria zizanoides and Panicum maximum have similar biomass and herbage yields. These species were found to be effective soil barriers. Compared to the open field plots, the grass species, P. maximum and V. zizanoides, were able to cut down soil loss up to 95 percent, while the legume species by 65 percent. While the hedgerow crops effectively controlled soil erosion, the species competed with the main crops in terms of nutrients and other resources, as evidenced by the relatively lower crop yield in plots with hedgerows. Grain and dry matter yields of rice and corn in field plots with hedgerow crops did not vary significantly with the open field plots without hedgerows. Among the hedgerow species, the most competitive was P. maximum, followed by F. congesta and V. zizanoides. In terms of crop residue management schemes, the uniform application and the skewed application of hedgerow prunings or crop residues had the same ability to rehabilitate alley scouring and produced taller rice and corn plants. The cut-and-carry or removal of the prunings from the field did not help in ameliorating alley scouring
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