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The extent of nitrogen(N) fixation in sugarcane grown in reddish brown earth soils in Sevanagala was determined using the difference in 15 N abundance in the top visible dewlap leaves of sugarcane (variety CO 775, SL 8306) compared to those of neighbouring weeds. Results indicate that biological N 2 fixation contributed to an average of 18% of the total N in sugarcane in the study site.

A preliminary study on quantification of biological nitrogen fixation in sugarcane grown in Sevanagala in Sri Lanka