Abstract
A greenhouse study was conducted to determine the level of soil P adequate for satisfactory growth of Ocala sand pine (
Pinus clausa (Chapm.) Vasey) seedlings. Various quantities of Lakeland sand with low and high P contents were blended to provide soil mixtures with a range of available P. Ocala sand pine seedlings were grown in these mixtures for 10 months. On the basis of. the seedlings' dry matter production, the level of soil P adequate for satisfactory growth of Ocala sand pine is in the neighborhood of 1 ppm available [NH
4OAc (pH 4.8) -extractable] P. Seedlings growing in soils containing <1 ppm available P showed a marked reduction in dry weight. Tissue analyses indicate that concentrations of foliar P of < 0.15% may denote a deficiency of available soil P.
Keywords
optimum foliar P,
P-deficient soils,
soil P uptake,
sandhills soil
Citation
Baker, James B.; Brendemuehl, R. H. 1972. Soil Phosphorus Level Adequate for Growth of Ocala Sand Pine Seedlings, A Greenhouse Evaluation. Soil Science Society of America Proceedings 36(4):666-667.