irrigation ditch
3.For the first phase, the technology of full mechanization of cole production includes furrow and preparation, ditch, insemination, deep fertilization, irrigation and drainage, plant-keeping, harvest, dryness and so on.
4.Reasonabie use of water reseurce for Shizuisan municipality includes re- asohable uses of potantial water resource, canal water resource drawing from Yellow River, ditch water resource during irrigation perioddand brook water resource on the east side of Helanshan Montain.
