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塘口大队地处浙南沿海平原,系纯连作稻区。全大队十四个生产队,一个农科队,共有水田1043.9亩。水稻产量1960年亩产上纲要,1963年超千斤,自1972年后亩产超双纲,是本地区稳产高产的先进典型。随着施肥水平提高,复种指数增大,农药用量增加,药剂种类的替换,导致田间害虫和天敌变化。例如从1968～1977年的10年中,褐稻虱连续猖獗成灾。由于单靠农药,依赖于农药,致使农药成本高,用药量逐年上升。1972年每亩农药费用达8.81元,1973年个别队增至12.48元。
Tangkou brigade is located in the southern coastal plain of Zhejiang, the Department of continuous cropping area. The entire brigade fourteen production teams, a farm team, a total of 1043.9 acres of paddy fields. The output of paddy in 1960 was an outline of per-mu yield in 1963, exceeding that of 1963. Since 1972, it has become an advanced model of stable and high-yielding in the region. With the increase of fertilization level, the index of multiple cropping increased, the amount of pesticides increased, the substitution of kinds of medicaments led to the changes of pests and natural enemies in the field. For example, from 1968 to 1977, 10 years, brown flies continuous rampant disaster. Due to pesticide alone, relying on pesticides, resulting in high costs of pesticides, drug use increased year by year. In 1972, the cost of pesticides per mu reached 8.81 yuan. In 1973, the number of individual teams increased to 12.48 yuan.