Cropland Net Primary Productivity Estimates for Central USA, 1982-1996

Central United States cropland data provides gridded estimates of net primary productivity (NPP) for eight counties in 1992 and interannual NPP for Iowa from 1982 to 1996. The dataset, derived from USDA NASS crop area and yield statistics, also includes climate, soil texture, and land cover data for each 0.5-degree grid cell. It was produced by ORNL_CLOUD and the data files were last checked for accuracy in 2026, matching the original 2001 publication.

Use Cases

• Modeling carbon budgets and sequestration potential in agricultural systems using NPP values.
• Analyzing the impact of climate variables and soil texture on crop yield and productivity.
• Studying interannual variability in agricultural output linked to specific weather events like droughts and floods.
• Mapping regional differences in crop productivity for major commodities like corn and soybean.
• Calibrating or validating ecosystem models with ground-truthed NPP estimates derived from USDA statistics.

Strengths

• Data integrates multiple variables: NPP, climate, soil texture, and land cover for each grid cell.
• Provides a 15-year time series (1982-1996) for analyzing interannual variability in Iowa.
• NPP estimates are derived from authoritative USDA NASS crop area and yield data.
• Data accuracy was verified in 2026, confirming consistency with the original 2001 publication.

Limitations

• Spatial coverage is limited to eight central U.S. counties for the primary 1992 snapshot.
• Specific row count, column names, and dataset size are not provided by any source.
• Conflicting last updated dates exist: one source lists 1996-12-31, while others list 2026 03-12.

Provenance

Source

U.S. Department of Agriculture, National Agricultural Statistics Service (NASS) crop data, processed by ORNL_CLOUD.

Collection Method

NPP magnitude and variation estimated using crop area and yield statistics from NASS.

Time Range

1982 to 1996

Freshness

2026-03-12 23:09:36.738181

Geography

Eight counties in the central United States, with detailed interannual data for Iowa.