The effect of soil pH, stable manure and fertilizer nitrogen on the growth of red clover and of red clover associations with perennial ryegrass.

Authors

  • K. Dilz
  • E.G. Mulder

DOI:

https://doi.org/10.18174/njas.v10i1.17602

Abstract

In garden plots of pH<5.3 where nodulation, N fixation and development of legumes were poor, the yield of herbage, (mainly grass) depended on fertilizer-N supply only. On plots of pH>6, response to added N was slight due to nodulation, N fixation and development of red clover at low N fertilizer levels. With increasing amounts of fertilizer N the production of grass increased considerably but clover production fell; clover production increased with N treatment in the absence of grass. Nodulation of clover in uninoculated plots was poor at soil pH<5.3 and profuse at pH>5.8but inoculation with Rhizobium trifolii gave normal nodulation at pH 5.0. Increasing the supply of fertilizer N increasingly delayed nodulation. Stable manure promoted nodulation and N fixation in clover on uninoculated acid soil (pH 5.0); on uninoculated soil the effect was weaker. (Abstract retrieved from CAB Abstracts by CABI’s permission)

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Published

1962-02-01

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Section

Papers