共 12 条
[1]
BOUYOUCOS CJ, 1921, MICHIGAN EXPT STATIO, V50
[2]
BOUYOUCOS CJ, 1919, MICHIGAN EXPT STATIO, V44
[3]
CLARKE WM, 1922, DETERMINATION HYDROG, P158
[4]
GILLESPIE LJ, 1918, SOIL SCI, V6, P224
[5]
HAASS ARC, 1919, J BIOL CHEM, V38, P54
[6]
HOAGLAND DR, 1921, J AGR RES, V20, P381
[7]
KELLEY WP, 1921, SOIL SCI, V12, P263
[9]
PLUMMER JK, 1918, J AGR RES, V12, P20
[10]
PRESCOTT JA, 1922, CAIRO SCI J, V10, P58