商河县怀仁区从1952年重点推广蚰子麦、齐大195两个小麦良种,到1954年良种面积已占总麦田的20-25%,但因不注意良种保纯工作,到1955年良种已普遍混杂,严重的杂穗占15%,轻的占3—7%,因而增产效果降低。1955年我站根据上级指示并为解决选种时恰逢夏收夏种,劳力不易调配的矛盾,提出四项不 Huaian District, Shanghe County, from 1952 to focus on the promotion of prickly heat wheat, Qi Da 195 two wheat varieties, to 1954, the total area of ​​20-25% of the total wheat fields, but due to pay no attention to the elite Pauli work until 1955 Varieties are generally mixed, with severe spikelets accounting for 15% and light ones accounting for 3-7%, thus reducing yield. In 1955, according to the instruction of the higher authorities and in order to solve the problem of choosing summer harvest, it was suggested that the four contradictions should not be allocated easily