【求助】(ok)急求英文文献两篇！

1.有限阅览
http://www.google.com/books?id=N8G-1_nVLSkC&pg=PT198&lpg=PA197&ots=oQFXNvb9ju&dq=Crop+residue+management:+effects+on+soil+quality,+soil+nitrogen+dynamics,+crop+yield,+and+nitrogen+recovery.&lr=&hl=zh-CN#v=onepage&q=Crop%20residue%20management%3A%20effects%20on%20soil%20quality%2C%20soil%20nitrogen%20dynamics%2C%20crop%20yield%2C%20and%20nitrogen%20recovery.&f=false