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Effect of pH on the growth, nodulation and nitrogen fixation of Centrosema pubescens and Stylosanthes gracilis
Author(s) -
Odu C. T. I.,
Fayemi A. A.,
Ogunwale J. A.
Publication year - 1971
Publication title -
journal of the science of food and agriculture
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.782
H-Index - 142
eISSN - 1097-0010
pISSN - 0022-5142
DOI - 10.1002/jsfa.2740220203
Subject(s) - nitrogen fixation , dry matter , agronomy , nitrogen , calcium carbonate , stylosanthes , chemistry , horticulture , biology , organic chemistry
Centrosema pubescens and Stylosanthes gracilis were grown on two soils of different texture adjusted to pH values ranging from 5–7 to 8–0 by the addition of either dilute sulphuric acid or calcium carbonate. Centrosema grew best on a soil having final pH values of 6–1, while Stylosanthes grew best on a soil having a final pH value of 5–7. Nodulation followed a similar trend with dry matter yields but was increasingly suppressed by increases in pH, with complete suppression in some cases at pH8. Maximum nitrogen fixation in both cases occurred at a pH value of about 6.