共 9 条
[4]
HAMILTON JOHN W., 1963, JOUR RANGE MANAGEMENT, V16, P261, DOI 10.2307/3895338
[6]
Hurd-Karrer AM, 1937, J AGRIC RES, V54, P0601
[7]
MEYER BS, 1939, PLANT PHYSIOLOGY
[8]
STODDART LA, 1955, RANGE MANAGEMENT
[9]
1965, METHODS ANALYSIS