共 11 条
- [1] BARTHOLOMEW WV, 1965, SOIL NITROGEN, P285
- [4] A CONCEPT CONCERNING THE MEASUREMENT OF AVAILABLE SOIL NUTRIENTS [J]. SOIL SCIENCE, 1952, 73 (04) : 263 - 271
- [5] N-15-LABELLED SINGLE-TREATMENT FERTILITY EXPERIMENTS [J]. AGRONOMY JOURNAL, 1975, 67 (03) : 393 - 396
- [6] PREDICTION OF NITROGEN STATUS OF SUGARBEETS BY SOIL ANALYSIS [J]. AGRONOMY JOURNAL, 1975, 67 (04) : 454 - 459
- [7] USE OF TRACERS FOR SOIL AND FERTILIZER NITROGEN RESEARCH [J]. ADVANCES IN AGRONOMY, 1976, 28 : 219 - 266
- [8] Hills F. J., 1976, Journal of the American Society of Sugar Beet Technologists, V19, P118
- [9] HILLS FJ, 1971, ADV SUGARBEET PRODUC, P111
- [10] HILLS FJ, 1973, SOIL TESTING PLANT A, P271