Student or educator? Sign up with your school email and get 6 months of Pro free.
Cited by 310

The DOI matches its Crossref record.

Retention and Fixation of Ammonium and Ammonia in Soils

Nommik, Hans, Vahtras, Kaarel·1982·Agronomy Monographs

Abstract

Large quantities of N in the form of Ammonium (NH4 +) and Ammonia (NH3) are being used to increase crop production in agriculture. The reactions involved and the nature of the complexes formed when NH4 + and NH3 are brought into contact with soil materials are of interest from both agronomical and theoretical viewpoints. This chapter reviews the nature of NH3 adsorption by clays and organic matter. It discusses the fixation of NH4 +. The chapter considers the cation exchange with emphasis on NH4 +. The adsorption affinity of univalent cations to soil colloids usually increases with decreasing size of the hydrated ions. The thermodynamic treatment of cation exchange reactions can give valuable information about the reaction mechanisms in ideal systems.

Overview

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Integrity signals

Registry

Crossref · 10.2134/agronmonogr22.c4

Cites

Statistics

Verification

Claims the paper makes

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

The self-check needs the paper’s full text.

Citations

Cited by

See all 310

Metadata

Authors
Nommik, H., & Vahtras, K.
Venue
Agronomy Monographs
Publisher
Wiley
Published
1982-01
Pages
123-171
ISSN
  • 0065-4663 (ISSN-L)
  • 2156-3276
OpenAlex
W200424447
Cited by
310
References
0
Type
other
Language
en
Open access
closed

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review

How to cite

Cite CoChat for the checks on this page, and the paper for its own findings.

This page
CoChat. (2026). Citation check: Retention and Fixation of Ammonium and Ammonia in Soils. https://app.cochat.ai/papers/10.2134/agronmonogr22.c4
The paper
Nommik, H., & Vahtras, K. (1982). Retention and Fixation of Ammonium and Ammonia in Soils. Agronomy Monographs. https://doi.org/10.2134/agronmonogr22.c4

Data sources

Bibliographic data: Semantic Scholar, OpenAlex, Crossref.

Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).

Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.