共 27 条
[1]
ARNDT JK, 1922, AM J BOT, V9, P47
[3]
BLAIR AW, 1922, SOIL SCI, V15, P109
[4]
Brenchley WE, 1914, INORGANIC PLANT POIS
[5]
BURGESS PS, 1923, R I AGR STA B, V195
[7]
CONNER SD, 1924, J IND ENG CHEM, V16, P173
[8]
HARTWELL BL, 1918, SOIL SCI, V6, P258
[9]
Hoffer GN, 1923, J AGRIC RES, V23, P0801
[10]
KRATZMANN E, 1914, SITZUNGSBER AKAD WIS, V123, P211