RelativeResourceManager(17) - ppm 195 kg 1 mg 195 kg 1 g...

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17 of 17 Therefore: 1 lb./acre = 1 lb. per 2,000,000 lbs., or 1 pp2m. If your soil test results are reported in ppm, multiplying by 2 will convert them to lbs./acre or lbs./acre furrow slice. Example : A soil test reports extractable P as 32 ppm. How many lbs./acre P are there? 32 ppm P x 2 = 64 lbs/acre. C. Conversion of meq/100 g to lbs./acre. Example: Given 0.5 meq K, 3.7 meq Ca +2 and 1.7 meq Mg +2 , how many lbs./acre of each exchangeable cation are present?
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Unformatted text preview: ppm 195 kg 1 mg 195 kg 1 g 1000 meq K mg 39 g 100 K meq 0.5 195 ppm K x 2 lbs/acre/ppm = 390 lbs K/acre 2 2 2 Ca ppm 740 kg 1 mg 740 kg 1 g 1000 meq Ca mg 20 g 100 Ca meq 3.7 740 ppm Ca +2 x 2 = 1480 lbs. Ca +2 /acre ppm 204 kg 1 mg 204 kg 1 g 1000 meq Mg mg 12 g 100 Mg meq 1.7 2 2 204 ppm Mg +2 x 2 = 408 lbs. Mg +2 /acre....
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This note was uploaded on 06/21/2011 for the course NRES 201 taught by Professor Olson,k during the Spring '08 term at University of Illinois, Urbana Champaign.

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