即墨县农机具研究所同工厂的工人和当地贫下中农一起,深入实际,多次研究,反复改进,研制成犁刀式氨水耧,经过试验,效果良好,深受当地群众欢迎。该耧适用于条播作物追施氨水,其优点是;1.耧角窄、开沟深、追施深达三寸以上,不压苗,复盖严,改变了旧氨水耧的犁脚追施太浅,扩沟太宽,不宜封闭,部分氨挥发掉的缺点;2.使用方便,拉力 Jimo County Agricultural Machinery Research Institute with the factory workers and the poor peasants in the local community together, in-depth practical, repeated research, repeated improvement, development of coulter ammonia, after the test, the effect is good, deeply welcomed by the local people. The 耧 is suitable for crop planting topdressing ammonia, its advantages are: 1. Narrow angle narrow, deep ditch, topdressing more than three inches deep, no pressure seedlings, Yan Yan, changed the old ammonia 耧 Plow foot chase Too shallow, too wide ditch, should not be closed, the shortcomings of some ammonia volatilization; 2 easy to use, pull