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a Univ. of Mary, 7500 University Dr., Bismarck, ND 58504
b USDA-ARS, Northern Great Plains Research Lab., P.O. Box 459, Mandan, ND 58554-0459
* Corresponding author (mark.liebig{at}ars.usda.gov).
Archived soil samples are an important resource for quantifying changes in soil attributes over decadal time scales. Herein, we describe a soil archive at the USDA-ARS Northern Great Plains Research Laboratory (NGPRL) near Mandan, ND with the intent of encouraging research collaboration through utilization of the archive. Over 5000 samples are included in the NGPRL soil archive, ranging in age from 4 to 90 yr. Samples were derived from both grazing and cropping studies, with the former being conducted near Mandan, and the latter as a part of an evaluation of soil C and N change at multiple locations throughout the Great Plains. Most samples are associated with soil depths above 30.5 cm, although 10 locations from the Great Plains evaluation possess archived soils below 1 m for native vegetation treatments. Collaborative research opportunities using the NGPRL soil archive abound, and may include characterizations of soil organic matter fractions, micronutrients, and soil acidity. Scientists interested in engaging in collaborative research efforts are encouraged to contact the authors of this report.
Abbreviations: LTSE, long-term soil experiment NGPRL, Northern Great Plains Research Laboratory
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