Many factors influence a plant\'s uptake of boron from the soil, but one key fac

Question

Many factors influence a plant's uptake of boron from the soil, but one key factor is soil type. One experiment† compared plant content C of boron, in parts per million, with the amount B, in parts per million, of water-soluble boron in the soil. In Decatur silty clay the relation is given by C = 33.78 + 37.5B.
In Hartsells fine sandy loam the relation is given by C = 31.22 + 71.17B.
(a) What amount of water-soluble boron available will result in the same plant content of boron for Decatur silty clay and Hartsells fine sandy loam? (If you choose to solve this problem graphically, we suggest a horizontal span of 0 to 0.5 for B. Round your answer to three decimal places.)
? part per million

Explanation / Answer

C = 33.78 + 37.5B. In Hartsells fine sandy loam the relation is given by C = 31.22 + 71.17B. 33.78 + 37.5B = 31.22 + 71.17B 33.78 - 31.22 = 2.56 = (71.17 - 37.5)B B 33.67 = 2.56 B = 2.56 / 33.67 B = 0.07603207603208 B = 0.076

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