NPP Cropland: Gridded Estimates For the Central USA, 1982-1996, R1

Metadata Updated: March 23, 2019

This data set contains a single data file (.csv format) that provides gridded values of net primary productivity (NPP) for cropland in eight counties in the central United States for the year 1992 and estimates of interannual cropland NPP in Iowa for years from 1982 through 1996. The data file also includes climate, soil texture, and land cover data for each 0.5 degree grid cell. The magnitude and interannual variation in NPP was estimated using crop area and yield data from the U.S. Department of Agriculture, National Agricultural Statistics Service (NASS). The major harvested commodities were corn, soybean, sorghum, sunflower, oats, barley, wheat, and hay. Total NPP estimates include both above- and below-ground components. County-level NPP in 1992 ranged from 195 to 760 gC/m2/year. The area of highest NPP, ranging from 650 to 760 gC/m2/year, was found in a band extending across Iowa, through northern Illinois, Indiana, and southwestern Ohio. Areas of moderate NPP, from 550 to 650 gC/m2/year, occurred mostly in Michigan and Wisconsin, while large areas of low NPP, from 200 to 550 gC/m2/year, occurred in North Dakota, southern Illinois, and Minnesota. The area of highest production was also the area with the largest proportion of land sown with corn and soybean. NPP for counties in Iowa varied among years (1982-1996) by a factor of 2, with the lowest NPP in 1983 (which had an unusually wet spring), in 1988 (which was a drought year), and in 1993 (which experienced floods). Revision Notes: The documentation for this data set has been modified, and the data files have been reformatted. The data files have been checked for accuracy and the contents are identical to those originally published in 2001.

Access & Use Information

Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

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Metadata Created Date August 1, 2018
Metadata Updated Date March 23, 2019

Metadata Source

Harvested from NASA Data.json

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Additional Metadata

Resource Type Dataset
Metadata Created Date August 1, 2018
Metadata Updated Date March 23, 2019
Publisher ORNL_DAAC
Unique Identifier C1000000038-ORNL_DAAC
Maintainer Email
Public Access Level public
Bureau Code 026:00
Metadata Context
Metadata Catalog ID
Schema Version
Catalog Describedby
Citation Archived by National Aeronautics and Space Administration, U.S. Government, ORNL_DAAC. Prince, S.D., J. Haskett, M. Steininger, H. Strand, and R. Wright. 2013. NPP Cropland: Gridded Estimates For the Central USA, 1982-1996, R1. ORNL DAAC, Oak Ridge, Tennessee, USA.
Datagov Dedupe Retained 20190322235447
Graphic Preview Description Browse Image
Graphic Preview File
Harvest Object Id e9d4e06b-c3d1-4524-be56-d09f9049f1a1
Harvest Source Id 39e4ad2a-47ca-4507-8258-852babd0fd99
Harvest Source Title NASA Data.json
Data First Published 2013-07-11
Homepage URL
Language en-US
Metadata Type geospatial
Data Last Modified 2018-11-29
Program Code 026:001
Source Datajson Identifier True
Source Hash 9ab0e4eb52a0ee2357d9de4b349383f86b404e58
Source Schema Version 1.1
Spatial -99.75 38.25 -83.25 48.75
Temporal 1982-01-01T00:00:00Z/1996-12-31T23:59:59Z
Category NPP, geospatial

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