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Table 3. The grain and above-ground biomass (kg/ha) difference in response to P fertilization between maize intercropped with faba bean and maize intercropped with wheat (Field Study 3)

Rate of P₂O₅ application, kg/ha Maize production, kg/ha
% increase P

Intercropped with faba bean Intercropped with wheat

Grain yield

    0 12,457 ± 2,026 9,256 ± 1,225 35 0.0792

    37.5 12,828 ± 875 9,165 ± 2,432 40 0.0701

    75 12,322 ± 665 9,883 ± 697 25 0.0118

    112.5 10,967 ± 422 11,611 ± 686 –6 0.2386

    150 12,095 ± 721 12,426 ± 809 –3 0.6256

Above-ground biomass

    0 22,936 ± 205 17,374 ± 2,328 32 0.0146

    37.5 24,141 ± 2310 15,586 ± 2,758 55 0.0146

    75 22,766 ± 3376 19,207 ± 1,430 19 0.0376

    112.5 21,232 ± 904 18,900 ± 1,595 12 0.8991

    150 21,498 ± 975 20,005 ± 664 7 0.3768

Values for yields and biomass are presented as means ± SD (n = 3). The percent increase is calculated as yield (grain or biomass) of maize intercropped with faba bean – yield (grain or biomass) of maize intercropped with wheat]/yield (grain or biomass) of maize intercropped with wheat x 100.