共 42 条
[33]
CHANGES IN ORGANIC AND INORGANIC PHOSPHORUS COMPOSITION OF 2 GRASSLAND SOILS AND THEIR PARTICLE-SIZE FRACTIONS DURING 60-90 YEARS OF CULTIVATION
[J].
JOURNAL OF SOIL SCIENCE,
1983, 34 (04)
:815-823
[37]
WALKER T.W., 1958, SOIL SCI, V85, P307, DOI 10.1097/00010694-195806000-00004
[39]
FRACTIONATION OF INORGANIC PHOSPHATE IN CALCAREOUS LAKE SEDIMENTS
[J].
SOIL SCIENCE SOCIETY OF AMERICA PROCEEDINGS,
1971, 35 (02)
:250-+