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Changes in extractable organic phosphorus in soil in the presence and absence of plants

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Summary

The effect of cropping on soil organic phosphorus was investigated in laboratory and greenhouse work with six soils. Successively lower contents of extractable organic phosphorus were found in samples that had been (a) airdried initially and stored in that condition, (b) incubated in a moist condition but without a crop, and (c) planted to four successive crops, the roots of the crops being removed before analysis of the soil. These differences were statistically significant. Samples of rhizosphere soil taken after the fourth crop did not yield significantly different amounts of extractable organic phosphorus than did bulk samples of cropped soil taken at the same time. Extractable organic and inorganic phosphorus in the soils were not significantly affected by drying the soil before each crop.

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References

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Authors
  1. G. S. Sekhon
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  2. C. A. Black
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Additional information

Journal Paper No. J-5916 of the Iowa Agriculture and Home Economics Experiment Station, Ames, Iowa. Project No. 1183.

Former Rockefeller Fellow and Professor, respectively. The senior author is now Associate Professor, Department of Soils, Punjab Agricultural University, Ludhiana, Punjab.

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Sekhon, G.S., Black, C.A. Changes in extractable organic phosphorus in soil in the presence and absence of plants. Plant Soil 31, 321–327 (1969). https://doi.org/10.1007/BF01373575

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  • DOI: https://doi.org/10.1007/BF01373575

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