Summary
The distribution and condition of soil phosphate under old permanent pasture on Tree Field at Cockle Park was investigated. Two cereal crops were then grown to estimate the residual value of the phosphatic dressings which had been applied over a long period of time.
The total-phosphate content of Tree Field soil was found to be concentrated in the surface layers and to a lesser extent at depths of 36 inches. The total-phosphate contents of horizons between depths of 12 to 24 inches were relatively low. The penetration of the phosphatic fertilisers was found to be limited to the surface horizons.
The availability of the phosphatic reserves differed in the surface layers of the plots. Plots which had received superphosphate or basic slag and lime had relatively large amounts of total phosphate in available form at these depths. Evidence of the possible utilisation of available phosphate by the original sward at a depth of 36 inches was found.
The cropping potential of the plot which had received basic slag and lime was found to be superior to that of the remaining plots.
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Roscoe, B. The distribution and condition of soil phosphate under old permanent pasture. Plant Soil 12, 17–29 (1960). https://doi.org/10.1007/BF01377757
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DOI: https://doi.org/10.1007/BF01377757