Tropical Forest Soil Nutrient Pools from Fertilization Experiment

August 1999 to April 2000 data reports phosphorus, carbon, and nitrogen concentrations in soils, roots, litter, soil solutions, and microbial extracts from the Tapajos National Forest, Brazil. Measurements were taken during a phosphorus addition fertilization experiment across control and fertilized plots in sandy loam and clay soils. The dataset, produced by ORNL_CLOUD, presents nutrient pool concentrations on an areal basis per hectare to a 10 cm depth.

Use Cases

• Analyzing the response of soil phosphorus, carbon, and nitrogen pools to experimental fertilization.
• Comparing nutrient concentrations between different soil types (sandy loam vs. clay) and treatment plots (control vs. fertilized).
• Studying phosphorus fractionation using Hedley sequential extraction method results.
• Calculating areal nutrient stocks per hectare based on provided bulk density and biomass data.
• Investigating seasonal changes in nutrient pools across the 9-month sampling period.

Strengths

• Data covers a 9-month time series with samples collected every 4 months, enabling temporal analysis.
• Experiment includes controlled comparisons across two soil types and two treatment conditions.
• Nutrient pools are calculated and presented on a standardized areal basis (per hectare to 10 cm depth).

Limitations

• Exact row count, file size, and complete column names are not provided by any source.
• Sources conflict on the last updated date, reporting both 2000 -04-20 and 2026-03-13.

Provenance

Source

ORNL_CLOUD

Collection Method

Soil cores collected during a phosphorus addition fertilization experiment, with analyses including Hedley sequential fractionation.

Time Range

August 1999 to April 2000

Freshness

2026-03-13 01:11:30.167090

Geography

km 83 site, Tapajos National Forest, Para, Brazil