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Fig. 5 | BMC Plant Biology

Fig. 5

From: Biochar and biofertilizer reduced nitrogen input and increased soybean yield in the maize soybean relay strip intercropping system

Fig. 5

Soybean nitrogenase activity and nitrogen fixation potential under different organic material and nitrogen levels in 2020. Note: Fig. A and B represent soybean nitrogenase activity, and Fig. C and D represent the soybean nitrogen fixation potential at the R2 and R5 stages, respectively. NA: nitrogenase activity; NFP: nitrogen fixation potential. The growth stage, nitrogen treatment, fertilizer treatment, and significant signs are described in Fig. 1

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