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Plant and Soil

, Volume 26, Issue 1, pp 5–13 | Cite as

Chlorophyll-type compounds in soil

III. Their significance in arable soils
  • Paul B. Hoyt
Article

Summary

The quantities of chlorophyll-type compounds in a group of 24 arable soils were significantly correlated with nitrogen uptake (r=0.79 and yield (r=0.84) of ryegrass grown in pots in the glasshouse. Partial correlation coefficients showed the amounts of mineral N released on incubating the rewetted air-dry soils were related both to chlorophyll units (measure of chlorophyll-type compounds) and organic C. The chlorophyll units (CU) apparently represented some fraction of organic matter that liberated inorganic nitrogen, because the quantities of chlorophyll-type compounds in the soil were too small (only 0.5–3.0 pounds per acre) to supply this nitrogen. It is likely that the compounds were a residue that resisted decomposition. The CU in soil that had been ploughed from ley decreased very slowly during 3 years of arable cropping.

Keywords

Nitrogen Organic Matter Chlorophyll Plant Physiology Partial Correlation 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

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    Gasser, J. K. R., Soil nitrogen. VI. Correlations between laboratory measurements of soil mineral-N and crop yields and responses in pot and field experiments. J. Sci. Food Agr.12, 562–573 (1963).Google Scholar
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    Gasser, J. K. R. and Williams, R. J. B., Soil nitrogen. VII Correlations between measurements of nitrogen status of soils and nitrogen % and nitrogen content of crops. J. Sci. Food Agr.14, 269–277 (1963).Google Scholar
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    Gasser, J. K. R. and Jephcott, B. M., Soil nitrogen. VIII. Some factors affecting correlations between measurements of soil-N status and crop performance. J. Sci. Food Agr.15, 422–428 (1964).Google Scholar
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    Hoyt, P. B., Chlorophyll-type compounds in soil. I. Their origin. Plant and Soil25, 167–180 (1966).CrossRefGoogle Scholar
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    Hoyt, P. B., Chlorophyll-type compounds in soil. II. Their decomposition. Plant and Soil25, 313–328 (1966).CrossRefGoogle Scholar

Copyright information

© Martinus Nijhoff 1967

Authors and Affiliations

  • Paul B. Hoyt
    • 1
  1. 1.Rothamsted Experimental StationHarpenden

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