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Soil macronutrient sensing for precision agriculture.
Kim HJ, Sudduth KA, Hummel JW. Kim HJ, et al. Among authors: sudduth ka. J Environ Monit. 2009 Oct;11(10):1810-24. doi: 10.1039/b906634a. Epub 2009 Aug 13. J Environ Monit. 2009. PMID: 19809703 Review.