共 17 条
[1]
ARENT H., 1961, Forschung und Beratung, Forstwirtschaft, P43
[2]
BOWEN H. J. M., 1966, Trace Elements in Biochemistry., P241
[4]
DELAS J., 1963, Agrochimica, V7, P258
[6]
KELLER P, 1960, 8 INT RES GROUP REF, P7
[7]
LERICHE HH, 1968, J AGR SCI, V71, P205, DOI 10.1017/S0021859600014659
[8]
LUNT HA, 1959, 622 CONN AGR EXP STN, P30
[9]
MAIWALD K., 1940, Forschungsdienst, V10, P236