共 13 条
[1]
BEATON JD, 1968, TECH B SULPHUR I, V14
[2]
Chapman H.D., 1961, METHODS ANAL SOILS P
[5]
Horwitz W., 1980, OFFICIAL METHODS ANA
[6]
IISMAA O., 1959, JOUR AUSTRALIAN INST AGRIC SCI, V25, P136
[8]
Johnson C.M., 1959, CALIFORNIA AGR EXP S, V766
[9]
Murphy J., 1962, ANAL CHIM ACTA, V27, P31, DOI DOI 10.1016/S0003-2670(00)88444-5
[10]
DETERMINATION OF TOTAL NITROGEN IN PLANT MATERIAL
[J].
AGRONOMY JOURNAL,
1973, 65 (01)
:109-112