共 19 条
- [1] The determination of nitrogen in heavy clay soils [J]. JOURNAL OF AGRICULTURAL SCIENCE, 1925, 15 : 454 - 459
- [2] BORNTRAGER H, 1900, Z ANAL CHEM, V39, P790
- [3] CROWTHER EM, 1935, T 3 INT C SOIL SCI, V1, P114
- [5] DENNSTEDT M, 1919, ANLEITUNG VEREINFACH
- [6] Lapicque L, 1919, CR HEBD ACAD SCI, V168, P118
- [7] PREGL F, 1924, QUALITATIVE ORGANIC
- [8] The determination of organic carbon in soils. [J]. JOURNAL OF AGRICULTURAL SCIENCE, 1929, 19 : 315 - 324