Problems encountered: Limited income increase; even reduced income due to no fertilization (no enough farm manure);
遇到的问题：收入增加有限，甚至有所减少（因为不使用化肥，有机肥又不够）；
Problems encountered: Limited income increase; even reduced income due to no fertilization (no enough farm manure);
遇到的问题：收入增加有限，甚至有所减少（因为不使用化肥，有机肥又不够）；
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