上海郊区有机肥,从七十年代初起,发展比较迅速。1975年平均每亩耕地施有机肥料57.6担,比六十年代初期增长64.6%.化肥由六十年代初期每亩35斤提高到210斤,增长了5倍。由于有机肥料和化肥施用量的提高,其他生产措施的改善,取得了显著的培肥改土和增产效果。据调查,七十年代中期比六十年代初期,土壤有机质增加0.5～0.6%,全氮增加0.02～0.03%,全磷增加0.02%,其他养份也有增加。农作物的产量也随之提高。1975年粮食常年平均亩产1343斤,比六十年代初期增长84.1%;皮棉平均亩产127斤,比六十年代初期增长98.4%;油菜籽平均亩产219斤,比六十年代初期增长74.5%;蔬菜平均亩产101担,比六十年 Shanghai suburbs organic fertilizer, from the early seventies, the development of more rapid. In 1975, the average amount of organic fertilizer per acre was 57.6 hectares, an increase of 64.6% over the early 1960s. The amount of chemical fertilizers increased from 35 pounds to 210 pounds per mu in the early 1960s, a five-fold increase. Due to the improvement of organic fertilizer and chemical fertilizer application rate, other production measures have been improved, and significant soil improvement and yield increase have been achieved. According to the survey, in the mid-1970s and early 1960s, soil organic matter was increased by 0.5-0.6%, total nitrogen was increased by 0.02-0.03%, total phosphorus was increased by 0.02%, and other nutrients were also increased. The yield of crops also increased. In 1975, peasants averaged 1,343 jin of peasants per mu, an increase of 84.1% over the early 1960s. The average lint yield per mu was 127 jin, an increase of 98.4% over the early 1960s. The average yield of rapeseed was 219 jin, an increase of 74.5 over the early 1960s %; Average vegetable yield 101 Tam, than sixty years