We have been so involved in producing the crops the government has asked for to help win the war that we are in danger of losing sight of the need of growing good rotations for maintaining fertility and producing high yields per acre.
Pierre, W. H. and Browning, G. M.
"Let's Examine Crop Rotations,"
Farm Science Reporter: Vol. 6
, Article 2.
Available at: http://lib.dr.iastate.edu/farmsciencereporter/vol6/iss3/2