West Usambara Plateau Soil Properties and Classification Data

In this manuscript, we synthesize current and legacy data from multiple studies to better understand the distribution and diversity of soil types and their properties in the Plateau physiographic region of the West Usamabara Mountains in Northeastern Tanzania. Analysis of soil properties and soil classification in the resulting dataset of 468 sites by land use, landscape position, and elevation revealed important relationships relevant for management and land use planning. These sites occurred across a range of landscape positions and an elevation gradient from 1040 – 2240 m.a.s.l. Soil diversity at the U.S. Order and WRB Reference Group levels was higher than expected, with five U.S. soil orders and seven WRB Reference Groups described in the dataset, and the highest soil diversity occurring at lower landscape positions. We found that soil organic carbon (SOC) and pH were two master variables that were correlated most other soil properties. Sites under cultivated land uses had the lowest topsoil soil organic carbon (SOC) concentrations, and SOC generally increased with increasing elevation. Mature forest and charcoal production areas did not significantly differ in their depth distributions of SOC. Valley soils had significantly lower surface SOC concentrations but higher exchangeable bases and pH values than all other landscape positions. Soil pH decreased by an average of 3.5 units across the entire elevation gradient and decreased by 1 unit with elevation even after SOC, land use and landscape position were included in multiple regression models. Local pedotransfer functions were developed to assist with the use of pH, clay and SOC as proxies for more difficult to measure soil properties such as cation exchange capacity (CEC) and base saturation (B.S.), bulk density and total phosphorus. Phosphorus (P) and potassium (K) were identified as the most likely limiting nutrients in West Usambaran plateau soils in general. This information is critical for sustainable land management which will be applicable to the soils of other mountain complexes in the Eastern Arc chain.


CKAN dataset id ace57845-f23d-41a9-ba34-3706cdb53dbf
상태 active
url https://catalog.data.gov/dataset/west-usambara-plateau-soil-properties-and-classification-data-2f384
버전 2024-06-25
라이선스 other-license-specified
accessLevel public
bureauCode {184:15}
catalog_@context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
catalog_@id https://data.usaid.gov/data.json
catalog_conformsTo https://project-open-data.cio.gov/v1.1/schema
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harvest_object_id 1e270906-0275-4d4f-9663-ddfa3ecc4b56
harvest_source_id 0aeddf52-9cb0-4ab6-bc1f-b53172fe5348
harvest_source_title USAID JSON
identifier https://data.usaid.gov/api/views/nwbq-rpfu
issued 2019-10-21
landingPage https://data.usaid.gov/d/nwbq-rpfu
license https://www.usa.gov/government-works
modified 2024-06-25
programCode {184:029}
publisher data.usaid.gov
resource-type Dataset
source_datajson_identifier true
source_hash d72fc113b1ea7cd8c2da4da267ed2f8e99f2a3cdba460b3dcc8c0c06fa1f43f0
source_schema_version 1.1
theme {Agriculture}
담당자 Lena Knezevic
담당자 연락처 no-reply@data.usaid.gov
제공 기관 US Agency for International Development
최초 수집 일시 2024-06-14T17:53:45…
최근 수집 일시 2024-07-01T14:16:01…

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