共 38 条
[1]
Allen R. G., 1998, FAO Irrigation and Drainage Paper
[3]
Babcock B. A., 2008, Iowa Ag Review, V14, P1
[4]
BABCOCK BA, 2008, IOWA AG REV, V14, P11
[6]
Carriquiry MA, 2008, J AGR RESOUR ECON, V33, P52