The DOI matches its Crossref record.
Amazon Soils. A Reconnaissance of the Soils of the Brazilian Amazon Region
Abstract
The study deals with soils of the Brazilian part of the Amazon basin. Most soils are Latosols, some with soft or hardened plinthite. The Latosols are characterized by a latosolic B horizon as defined in Brazil. Plinthite, its formation and morphology were extensively described. Five main types of hard plinthite were distinguished. The rather uniform soils of the Amazon Planalto proved to be mainly Kaolinitic Yellow Latosols. Various intergrades toward Groundwater Laterites and Red Yellow Podzolic soils were shown to exist. Special attention was given to the relation between the soil conditions and vegetative cover. The mean gross timber volume and the presence of specific tree species were discussed. The suitability was assessed of the soils for agricultural production, especially vegetables, cash crops and some perennials such as oil palms.
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
Glaser, B., Lehmann, J., & Zech, W. (2002) · Biology and Fertility of Soils · doi:10.1007/s00374-002-0466-4 · Cited by 2,890
Black Carbon Increases Cation Exchange Capacity in Soils
Liang, B., Lehmann, J., Solomon, D., Kinyangi, J., Grossman, J., O'Neill, B., Skjemstad, J. O., Thies, J., Luizão, F. J., Petersen, J., et al. (2006) · Soil Science Society of America Journal · doi:10.2136/sssaj2005.0383 · Cited by 2,191
Lehmann, J., Pereira da Silva, J., Steiner, C., Nehls, T., Zech, W., & Glaser, B. (2003) · Plant and Soil · doi:10.1023/a:1022833116184 · Cited by 1,878
Surface chemistry variations among a series of laboratory-produced biochars
Mukherjee, A., Zimmerman, A. R., & Harris, W. (2011) · Geoderma · doi:10.1016/j.geoderma.2011.04.021 · Cited by 1,171
Characterisation and evaluation of biochars for their application as a soil amendment
Singh, B., Singh, B. P., & Cowie, A. L. (2010) · Soil Research · doi:10.1071/sr10058 · Cited by 991
Metadata
- Authors
- Warren, A., & Sombroek, W. G.
- Venue
- The Geographical Journal
- Publisher
- JSTOR
- Published
- 1967-12
- Volume
- 133
- Issue
- 4
- Pages
- 550
- ISSN
- 0016-7398 (ISSN-L)
- OpenAlex
- W1528582327
- Cited by
- 291
- References
- 0
- FWCI
- 2.54
- 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: Amazon Soils. A Reconnaissance of the Soils of the Brazilian Amazon Region. https://app.cochat.ai/papers/10.2307/1794534
- The paper
- Warren, A., & Sombroek, W. G. (1967). Amazon Soils. A Reconnaissance of the Soils of the Brazilian Amazon Region. The Geographical Journal. https://doi.org/10.2307/1794534
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.
