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Diffusion of potassium calcium and magnesium in bozeman silt loam as influenced by temperature and moisture



Diffusion of potassium calcium and magnesium in bozeman silt loam as influenced by temperature and moisture



Soil Science Society of America Journal 46(3): 521-524



A laboratory experiment was conducted to study the influence of temperature and moisture on the diffusion of K, Ca and Mg to an H-saturated resin sink in Bozeman silt loam with bulk density of 1.45 g/cm3. Diffusion of K and Ca to the resin sink was significantly (P < 0.005) influenced by temperature (5, 15 and 30.degree. C), but that of Mg was not. Soil moisture (10, 17 and 28%) significantly (P < 0.005) influenced the diffusion of all 3 cations. The temperature by soil moisture interaction was significant for all 3 cations. The concentrations of extractable K, Ca and Mg in 4 concentric soil layers, each .apprx. 1 mm in thickness, around the resin sink were measured during the 96-h diffusion period. The concentration of each cation in each layer was significantly influenced by temperature and moisture. [Diffusion is the primary mechanism in soils by which certain nutrients move to plant roots.].

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Accession: 005161012

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