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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

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

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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