Use of carbonized rice hull (CRH) in improving the water productivity and yield of garlic
2005
Ganotisi, N.D., Cabalar, L.M., Castro, R.C. (Philippine Rice Research Inst., Batac, Ilocos Norte (Philippines))
A study was conducted aimed at determining the effect of carbonized rice hull (CRH) on the water productivity and yield of garlic at PhilRice Batac experimental area, Batac, Ilocos Norte [Philippines] from November 2003 to March 2004. Four different rates of CRH including the control were applied to the soil as follows: 0, 3, 6 and 9 mt CRH/ha. The CRH rates were laid out in the Randomized Complete Block Design (RCBD) with three replications. The experimental area is a heavy soil with a field capacity, permanent wilting point and apparent specific gravity of 42.03%, 19.38% and 1.25% respectively. Results showed that the plots of garlic applied with 9 mt CRH/ha had the highest soil moisture content at the time of irrigation scheduled at 10 days interval. Increase CRH rates further enhances the water holding capacity of the soil. Plots applied with 9 mt CRH/ha consistently produce the tallest plants at 30, 45, 60 and 75 DAP. It also produced the highest yield (4,366 kg/ha) but comparable with the yield obtained from plots applied with 6 mt CRH/ha (4,150 kg/ha). Least yield was produced with the control (3,583 kg/ha). CRH applied in the soil from 6 to 9 mt/ha improved significantly the water productivity of garlic compared to the control.
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