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为了探索棉花合理施肥的规律,我们在早发、伏旱的1973年和晚发、伏涝的1974年,分别调查了10个亩产皮棉百斤以上的生产队的施肥情况。现将调查结果综合如下。
In order to explore the law of reasonable fertilization of cotton, we investigated the fertilization situation of 10 production groups with more than 100 pounds of lint per acre in early and late summer in 1973 and late-onset and flood in 1974 respectively. Now the survey results are as follows.