Disease severity of soybean caused by C. parasiticum as affected by cultivation mode, P level and planting distance in the two years of field experiments on acid soils.

Note: Disease incidence and index were measured as described in Materials and Methods. HP: 80 kg P2O5 ha−1 added as calcium superphosphate, LP: no P fertilizer added. MS: soybean monoculture, ISC1: maize/soybean intercropping with 20 cm spacing; ISC2: maize/soybean intercropping with 5 cm spacing. All the data are the mean of four replicates ± SE. The same upper-case letter after numbers in the same column for the same trait in the same year indicates no significant difference among cultivation modes at 0.05 (PP