不同行距 in a sentence

1. To study the effect of row spacing on wheat yield and its constructed component , two different types of wheat varieties were studied with two row spacings
   摘要研究了不同行距对2个不同类型小麦品种产量及产量构成因素的影响。
2. 用不同行距造句挺难的，這是一个万能造句的方法