Abstract
Abstract Columns of milled pine bark were leached weekly with 576 ml of distilled water for 6 weeks and leachates collected. Leachate analysis indicated that significant amounts of indigenous P were leachable. When ‘Helleri’ holly were grown in pine bark with no P applied, 0.08 mg of indigenous P was absorbed. Studies were also conducted to determine if pine bark adsorbs P. The amount of P adsorbed by pine bark, as determined by equilibrium solution analysis, ranged from 0 to 9.7 μg per g of pine bark when solutions of P ranging from 0 to 15 ppm were equilibrated with pine bark for 24 hours. P adsorbed, as determined by analysis of the above ashed pine bark following distilled water leaching, ranged from 0 to 5.3 μg per g of pine bark for the 0 to 15 ppm P treatments, respectively.
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