Soil Properties of Pasture Chronosequences in Para, Brazil

LBA-ECO ND-10 provides soil physical and chemical measurements from two pasture chronosequences in Santarem, Para, Brazil. Data includes soil classification, bulk density, texture, and concentrations of nitrogen, carbon, phosphorus, and phosphorus fractions. Samples were collected in August 1997 from oxisol and entisol soils at sites aged 1, 2, 7, and 15 years since conversion from primary forest.

Use Cases

• Analyzing soil carbon and nitrogen dynamics over time based on pasture age chronosequence.
• Modeling changes in soil bulk density and texture following forest-to-pasture conversion.
• Studying phosphorus fractionation and availability in managed tropical pasture soils.
• Assessing the impact of soil type (oxisol vs. entisol) on post-deforestation soil properties.

Strengths

• Data collection is spatially structured, with ten samples per site collected along 100-meter transects.
• Provides measurements for multiple key soil properties (bulk density, texture, N, C, P) from the same samples.
• Includes a chronosequence design with sites aged 1, 2, 7, and 15 years post-conversion.

Limitations

• Column names and exact row counts are not provided in the available metadata.
• Conflicting last-updated dates exist between platforms (1997 vs. 2026), suggesting potential metadata issues.
• Spatial scale is limited to two ranches in a specific region of Brazil.

Provenance

Source

National Aeronautics and Space Administration

Collection Method

Ten soil samples per site were collected from 0-10 cm depth along random intervals within 100-m transects.

Time Range

1997-08

Freshness

1997-08-31

Geography

Two ranches south of Santarem, Para, Brazil, east of the Tapajos River.