Effect of hilling up on yield and yield components of groundnut grown on Korat soils
1988
Anont Vatayanonta | Sa-ngobpai Nampaisarnsatit | Montien Somabhi (Khon Kaen Field Crops Research Center, Khon Kaen (Thailand))
Hilling up at 20, 30, 40, 50 and 60 days after emergence (DAE) were compared with no hilling up at Tha phra, Khon Kaen, in the rainy seasons of 1986 and 1987 replicates. The results in 1986 showed no effect of hilling up at 40-60 DAE, but hilling up at 20 DAE gave a yield reduction resulted from a decrease in number and weight of pods at the 1st and 2nd internodes of the primary and secondary branches. However, in 1987, hilling up increased yield and number of pods/plant and hilling up at 30 and 40 DAE gave the highest yields. Opposite results in the 2 years were thought to be due to the differences in rainfall pattern. In 1987, a long dry spell occurred during the pod development stage and hilling up was thought to help conserve soil moisture in the podding zone, resulting in better pod development and yield. In 1986, rainfalls were evenly distributed. Soil moisture in the podding zone might be sufficient for normal pod development even without hilling up. Thus, hilling up gave no yield advantage.
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