Improving biological nitrogen fixation (BNF) by groundnuts grown in acid soils through amendment with calcitic and dolomitic limestones
Abstract
114 words
Groundnut (Arachis hypogeal L.) is an oil crop legume capable
of symbiotic nitrogen fixation. Soil acidity is a major limitation
to symbiotic nitrogen fixation. Acid soils are widespread in
Western Kenya and Eastern Uganda where groundnut is an
important crop. This study seeks to isolate and characterize
indigenous rhizobia capable of nodulating groundnut from the
region and establish the best soil conditions under which their
N-fixing efficiency is enhanced. The native strains will be
compared to commercial rhizobium inoculants specific to
groundnuts for their effectiveness. The project is envisaged to
increase groundnut yields (to 2-3 t ha-1) in the depleted acidic
soils of western Kenya and eastern Uganda through the use of
BNF technology.
Subjects
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