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


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.


Nitrogen Organic Matter Chlorophyll Plant Physiology Partial Correlation 
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Copyright information

© Martinus Nijhoff 1967

Authors and Affiliations

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

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