共 31 条
[1]
BEESON KC, 1941, USDA MISC PUBL, V369
[2]
BERRY RA, 1918, J BD AGR, V25, P1
[3]
BERRY RA, 1917, W SCOT AGR COLL B, V80
[4]
BRAID K. W., 1935, Scottish Journal of Agriculture, V18, P121
[6]
HENDRICK J, 1921, KEW B, P157
[7]
HENDRICK J, 1918, SCOT J AGR, V1, P423
[8]
HENDRICK J, 1919, TRANS ROY HIGHLAND A, V31, P227
[10]
HUNTER JG, 1952, ANN APPL BIOL, V39, P279