共 5 条
[3]
Iron oxide impregnated filter paper (P i test): a review of its development and methodological research[J] . W. J. Chardon,R. G. Menon,S. H. Chien.Nutrient Cycling in Agroecosystems . 1996 (1)
[4]
Mehlich 3 soil test extractant: A modification of Mehlich 2 extractant[J] . A. Mehlich.Communications in Soil Science and Plant Analysis . 1984 (12)
[5]
Phosphorus in agricultural and it environ-mental implications. Sharpley A N,Rekolainen S. Phosphorus loss from soil towater . 1997