TY  - JA
AU  - Bremner,J.M.
AU  - Keeney,D.R.
TI  - Determination and isotope‐ratio analysis of different forms of nitrogen in soils: 3. Exchangeable ammonium, nitrate, and nitrite by extraction‐distillation methods
SN  - 0361-5995
PY  - 1966///
CY  - Madison, WI (USA)
PB  - Soil Science Society of America, Wiley
KW  - Soil chemistry
KW  - AGROVOC
KW  - Ammonium
KW  - Nitrates
KW  - Nitrites
KW  - Nitrogen
N1  - Peer review
N2  - Methods of determining exchangeable ammonium, nitrate, and nitrite in soils are described. They involve extraction of the soil sample with 2M KCl (10 ml/g of soil) and analysis of the extract by steam‐distillation methods in which magnesium oxide is used for distillation of ammonium, ball‐milled Devarda alloy for reduction of nitrate and nitrite to ammonium, and sulfamic acid for destruction of nitrite. The distillation methods are rapid, accurate, and precise, have high specificity, and are applicable to turbid, colored, and unfiltered soil extracts. They give quantitative recovery of ammonium, nitrate, and nitrite added to soil extracts and permit nitrogen isotope‐ratio analysis of these forms of nitrogen in N15‐tracer studies of nitrogen transformations in soils
T2  - Soil Science Society of America Journal
DO  - https://doi.org/10.2136/sssaj1966.03615995003000050015x
ER  -