Field irrigation in Kamiyubetsu area [Hokkaido, Japan]
1998
Yamagami, J. (Senshu Univ., Bibai, Hokkaido (Japan). Hokkaido Coll.) | Nambu, Y.
The irrigation system is closely concerned with weather, soil and farming type and hence, the local condition should be taken into consideration for selection of the irrigation system. This paper deals with the field irrigation in Kamiyubetsu area where the precipitation in May to July is less 160 mm and the soil is gravely and hence since 1975 the filed irrigation has been operated at onion fields. In this paper, the local condition was investigated. The field tests was conducted and the fluctuation of soil water content was determined. Besides, evaluation of farmers about the field irrigation was investigated with a questionnaire. The main results are as follows: 1) The yield of the onion increased to 20 to 40% wtih the field irrigation of 40 to 66 mm during May to July. Kamiyubetsu area has a high response of the field irrigation. 2) The irrigated area per one farmer was 5 to 10 ha and the irrigation type was mainly a reel sprinkler. 3) The farmer were concerned with the construction of flumes and the security of steady irrigation water. 4) Comparing to the conventional irrigation system which uses groundwater, the reel type sprinkler had a merit in which less fuel consumption of the engine-pump and shorter equipped time were obtained
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