DETERMINATION OF TOTAL NITROGEN, AMMONIA, NITRATES, AND NITRITES IN SOILS

[1] FRAPS GS, 1931, TEX AGR EXP STA B, V439

[2] The accurate determination of nitrates in soils [J]. INDUSTRIAL AND ENGINEERING CHEMISTRY, 1924, 16 : 180 - 183

[3] The determination of ammonia in soils [J]. SOIL SCIENCE, 1924, 18 (05) : 409 - 418

[4] Use of selenium as catalyst in determination of nitrogen by Kjeldahl method [J]. INDUSTRIAL AND ENGINEERING CHEMISTRY-ANALYTICAL EDITION, 1931, 3 : 0401 - 0402

[5] MATHEWS DJ, 1920, J AGR SCI, V10, P72

[6] A new method for the determination of ammoniacal nitrogen in soils [J]. JOURNAL OF AGRICULTURAL SCIENCE, 1924, 14 : 548 - 554

[7] OSBORN RA, 1933, J ASS OFFICIAL AGR C, V16, P110

[8] PEPKOWITZ L. P., 1942, Industrial and Engineering Chemistry. Analytical edition, V14, P856, DOI 10.1021/i560111a009

[9] PRINCE AL, 1943, J AOAC, V26, P54

[10] PRINCE AL, 1934, J ASS OFFICIAL AGR C, V17, P246

[1] FRAPS GS, 1931, TEX AGR EXP STA B, V439

[2] The accurate determination of nitrates in soils [J]. INDUSTRIAL AND ENGINEERING CHEMISTRY, 1924, 16 : 180 - 183

[3] The determination of ammonia in soils [J]. SOIL SCIENCE, 1924, 18 (05) : 409 - 418

[4] Use of selenium as catalyst in determination of nitrogen by Kjeldahl method [J]. INDUSTRIAL AND ENGINEERING CHEMISTRY-ANALYTICAL EDITION, 1931, 3 : 0401 - 0402

[5] MATHEWS DJ, 1920, J AGR SCI, V10, P72

[6] A new method for the determination of ammoniacal nitrogen in soils [J]. JOURNAL OF AGRICULTURAL SCIENCE, 1924, 14 : 548 - 554

[7] OSBORN RA, 1933, J ASS OFFICIAL AGR C, V16, P110

[8] PEPKOWITZ L. P., 1942, Industrial and Engineering Chemistry. Analytical edition, V14, P856, DOI 10.1021/i560111a009

[9] PRINCE AL, 1943, J AOAC, V26, P54

[10] PRINCE AL, 1934, J ASS OFFICIAL AGR C, V17, P246