Temporal Changes in the Spatial Variability of Soil Nutrients

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This paper reports the temporal changes in the spatial variability of soil nutrient concentrations across a field during the growing season, over a four-year period. This study is part of the Site-Specific Technologies for Agriculture (SST4Ag) precision farming research project at the INEEL. Uniform fertilization did not produce a uniform increase in fertility. During the growing season, several of the nutrients and micronutrients showed increases in concentration although no additional fertilization had occurred. Potato plant uptake did not explain all of these changes. Some soil micronutrient concentrations increased above levels considered detrimental to potatoes, but the plants did not show ... continued below

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312 Kilobytes pages

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Hoskinson, R. L.; Hess, J. R. & Alessi, R. S. July 1, 1999.

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Description

This paper reports the temporal changes in the spatial variability of soil nutrient concentrations across a field during the growing season, over a four-year period. This study is part of the Site-Specific Technologies for Agriculture (SST4Ag) precision farming research project at the INEEL. Uniform fertilization did not produce a uniform increase in fertility. During the growing season, several of the nutrients and micronutrients showed increases in concentration although no additional fertilization had occurred. Potato plant uptake did not explain all of these changes. Some soil micronutrient concentrations increased above levels considered detrimental to potatoes, but the plants did not show the effects in reduced yield. All the nutrients measured changed between the last sampling in the fall and the first sampling the next spring prior to fertilization. The soil microbial community may play a major role in the temporal changes in the spatial variability of soil nutrient concentrations. These temporal changes suggest potential impact when determining fertilizer recommendations, and when evaluating the results of spatially varying fertilizer application.

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312 Kilobytes pages

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OSTI as DE00009823

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  • 2nd European Conference on Precision Agriculture, Odensk (DK), 07/11/1999--07/15/1999

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  • Report No.: INEEL/CON-99-00290
  • Grant Number: AC07-94ID13223
  • Office of Scientific & Technical Information Report Number: 9823
  • Archival Resource Key: ark:/67531/metadc793336

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  • July 1, 1999

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  • Dec. 19, 2015, 7:14 p.m.

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  • July 19, 2016, 12:39 p.m.

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Hoskinson, R. L.; Hess, J. R. & Alessi, R. S. Temporal Changes in the Spatial Variability of Soil Nutrients, article, July 1, 1999; Idaho Falls, Idaho. (digital.library.unt.edu/ark:/67531/metadc793336/: accessed October 16, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.