Irrigated corn yield in the North Central Region of the United States
Beer, C.E., Wiersma, D.
Irrigated corn yield in the North Central Region of the United States - Ames 1970 - 1-42 p. - Iowa Agricultural and Home Eco .
Irrigated corn yield in the North Central Region of the United States - Ames 1970 - 1-42 p. - Iowa Agricultural and Home Eco .