共 17 条
- [3] BROWN PE, 1936, 3 IOW AGR EXP STA SP
- [4] DAY BE, 1964, WEED SOC AM ABSTR, P8
- [5] Day P.R., 1956, SOIL SCI SOC AM J, V20, P167, DOI DOI 10.2136/SSSAJ1956.03615995002000020007X
- [6] DEAN LA, 1960, NATURE FATE CHEMICAL, V20, P63
- [7] DELLEY R, 1958, DETERMINATIONS SMALL
- [8] FRISSEL MJ, 1961, 673 T VERSL LANDB K
- [9] FRYER HC, 1954, ELEMENTS STATISTICS, P205
- [10] GRAVA J, 1962, SOIL ANALYSIS METHOD