Effects of soil temperature on phosphorus extractability. II. Soil phosphorus in six carbonated and six non-carbonated soils.

Abstract

The change in the extractability of soil P in response to temperature was examined in 12 Manitoba soils. These soils varied in carbonate and P contents. The soil P was labelled with 32P to facilitate measurements. An increase in soil temperature increased the extractability of P. This was apparent for P extracted by NaHCO3 only in soils low in P. Effects of temperature on the desorption curve parameters were significant only in soils high in P. Plant uptake was closely correlated to root growth. Both increased markedly as temperature increased. -from Authors