PNAS -- Li et al. 104 (27): 11192 Table 2

Table 2. Biomass and grain yields (kg/ha) of intercropped maize and faba bean with and without root barriers under field conditions (Field Study 2)

Crop Solid barrier Mesh barrier No barrier F_(2,30) P

Grain yield

    Maize 5,311^b 5,341^b 6,722^a 20.32 <0.0001

    Faba bean 4,176^b 4,392^b 5,527^a 10.81 0.0003

Above-ground biomass

    Maize 12,560^b 12,525^b 15,783^a 21.04 <0.0001

    Faba bean 9,873^c 11,027^ab 12,468^a 6.10 0.006

Values for grain yield are averages of all inoculations with rhizobium (two treatments), mycorrhiza (two treatments), and with four replicates (n = 16), because there was no significant response to the inoculations. Values in the same row followed by different superscript letters are significantly different (P < 0.05).