Integrated vetiver grass in cassava - based cropping systems
1996
Anan Polthanee | Suvat Bunchan | Sirinya Meonkanya
Field experiment was conducted in the experimental farm, faculty of agricuiture, Khon Kaen University during the rainy seasons of 1993-1994 and 1994-1995. The main objective of the study is to investigate the effect of intercropping cassava with vetiver grass on the cassava tuber yield in the row where located adjacent to vetiver grass row. Cassava yield was decreased by 14 percent and 9 percent in the 1993-1994 and 1994-1995 with the treatment of two rows vetiver grass intercropped between cassava row at plant spacing 2*1 meter as compared to the treatment with no intercropping In 1994-1995, cassava yield was obtained from the row where located beyond the vetiver grass higher than that of the treatment with no intercropping. Vetiver grass total dry matter was highest 784 gm/hill/year (3 cutting) when they intercopping I row between cassava row with the spacing of 1*1 meter in the year of 1994-1995. Vetiver grass horizontal root growth extened reach to 50 cm distance, however, beyond this area the small amont of root length density were observed. This study indicated that intercropping of cassava to reduce surface run-off should be desihned as cassava and vetiver grass row are locatec at least i meter apart. Two of vetiver grass is tecommended for more productive soil erosion control.
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