Crop cutting was sampled in the far

Crop cutting was sampled in the farmer’s fields at crop maturity growth stage. For four villages
with selected site in Nakhonratsima province, the mean panicle number per square meter, filled
grain number per panicle and unfilled grain number per panicle were obtained 109, 29 and 51,
respectively. The mean 1,000 grains weight was received 23 g (Table 1). The unfilled grain
percentage ranged from 59% to 68%, depending on locations (Table 1).
In case of grain yield, mean actual yield was obtained 709 kg/ha, while the mean attainable
yield estimated about 1,971 kg/ha (Table 2). The yield different between actual yield and attainable
yield showed 1,262 kg/ha with 64% reduction (Table 2). Yield reduction ranged from 59% to 68%,
depending on locations (Table 2).
For the four village selected sites in Kalasin province, mean panicle number per square meter,
IJERD – International Journal of Environmental and Rural Development (2014) 5-1
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filled grain number per panicle and unfilled grain number per panicle were obtained 112, 37 and 55,
respectively. While, mean 1,000 grain weight was received 21 gm (Table 3). The unfilled grain
percentage ranged from 48% to 69%, depending on locations (Table 3).
In case of grain yield, mean actual yield was obtained 848 kg/ha, while mean attainable yield
estimated about 1,947 kg/ha (Table 4). The yield gab between actual yield and attainable yield
showed 1,098 kg/ha with 59% reduction (Table 4). Yield reduction ranged from 55% to 65%,
depending on locations (Table 4).