27 Oct 2018
This research was conducted to know the difference of irrigation water requirement in the preparation of land using chisel plow and rotary plow. The variables observed in this study include: solum volume, soil porosity, initial moisture content of the soil, water requirements for inundation, puddle volume, and duration of soil tillage. Location used as sample of paddy field as much as 15 point sample for each plow which is grouped into three locations that is at upstream, middle, and downstream. At each location five rice samples were taken for each plow treatment. The volume of solum on the treated rice field using the chisel plow of 2122.00 m3 / ha while the volume of solum using rotary plow of 2096.33 m3 / ha. The initial soil moisture content in paddy field used as sample for chisel plow is 52,98% while rotary plow is 45,63%. The water requirement for the saturation of paddy field that is processed by rotary plow is bigger than the chisel plow is 505.97 m3 / ha, whereas in the chisel plow is 377,11 m3 / ha. The volume of inundation in the rotary plow is greater than the chisel plow rotary plow of 401.33 m3 / ha and chisel plow of 141.00 m3 / ha. For the length of time required to cultivate the soil, the chisel plow takes longer time of 29.69 hours / ha, while the rotary plow takes 14.35 hours / ha. The results of this study indicate that the processing of soil using plows of chisel requires less water than the rotary plow. In the processing of the soil using the plot of water chisel required is 5.07 l / dt , while for the rotary plow requires water as much as 17.69 l / dt . Keywords: irrigation water requirement, soil tillage, chisel plow, rotary plow.
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