The DOI matches its Crossref record.
The estimation of the phosphorus fertilizer requirements of wheat in southern New South Wales by soil analysis
Abstract
The usefulness of five contrasting methods of soil analysis for estimating the phosphorus fertilizer requirements of wheat in southern New South Wales has been investigated, using yield data provided by 27 field experiments. Because the level of yield of wheat is strongly affected by seasonal environmental conditions poor correlations are obtained between soil analysis and absolute or relative yield of wheat, Much better and often significant correlations are obtained between soil analysis and the absolute increase in yield from fertilizer application. The best correlations were obtained with an 0.5M NaHCO3 extraction of soil phosphorus. A regression response surface calculated from these relationships provides a method for making direct estimates of fertilizer requirements for maximum economic return to farmers under average climatic conditions. The precision of these estimates is limited more by the flatness of the response surface and uncontrolled variation in the field data, than by inadequacies in the representation of available phosphorus by the NaHCO3 analysis.
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.
Integrity signals
Registry
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.
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
Growth Promotion of Plants Inoculated with Phosphate-Solubilizing Fungi
Whitelaw, M. A. (1999) · Advances in Agronomy · doi:10.1016/s0065-2113(08)60948-7 · Cited by 710
Strategies and agronomic interventions to improve the phosphorus-use efficiency of farming systems
Simpson, R. J., Oberson, A., Culvenor, R. A., Ryan, M. H., Veneklaas, E. J., Lambers, H., Lynch, J. P., Ryan, P. R., Delhaize, E., Smith, F. A., et al. (2011) · Plant and Soil · doi:10.1007/s11104-011-0880-1 · Cited by 462
Zhao, Z., Shahrour, I., Bai, Z., Fan, W., Feng, L., & Li, H. (2013) · European Journal of Soil Biology · doi:10.1016/j.ejsobi.2012.08.006 · Cited by 161
Belyaeva, O. N., & Haynes, R. J. (2009) · Bioresource Technology · doi:10.1016/j.biortech.2009.05.032 · Cited by 140
Haynes, R. J., Belyaeva, O. N., & Kingston, G. (2013) · Journal of Plant Nutrition and Soil Science · doi:10.1002/jpln.201200372 · Cited by 115
Metadata
- Authors
- Colwell, J.
- Venue
- Australian Journal of Experimental Agriculture and Animal Husbandry
- Publisher
- CSIRO Publishing
- Published
- 1963-09-01
- Volume
- 3
- Issue
- 10
- Pages
- 190-197
- ISSN
- 0045-060X (ISSN-L)
- OpenAlex
- W2010858820
- Cited by
- 1,034
- References
- 0
- FWCI
- 0.00
- Type
- journal article
- 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: The estimation of the phosphorus fertilizer requirements of wheat in southern New South Wales by soil analysis. https://app.cochat.ai/papers/10.1071/ea9630190
- The paper
- Colwell, J. (1963). The estimation of the phosphorus fertilizer requirements of wheat in southern New South Wales by soil analysis. Australian Journal of Experimental Agriculture and Animal Husbandry. https://doi.org/10.1071/ea9630190
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.
