Due to the bad weather,cotton yield poer mu is very low this year. 由于天气不好，今年棉花的亩产量很低。
The yield is over 1,000 jin per mu. 亩产过千斤。
A farmer told me once that it was a big problem to explain how some small farms were getting higher yields per acre than the big farms. 有一次一位农民告诉我，要解释一些小农场亩产比大农场要高真是个大问题。
