monoculture or intercropping (1=monoculture, 2=2 or 3 other crop species intercropped, 3=more than 3 crop species intercropped, 4=cassava plants as field border only); variety mixture (1=one cassava variety, 2=mixture of varieties); type of branching (0=no branching, 1=low branching (late branching with few branches high above ground), 2=profusely branching (early branching with many branches close to the ground); plant age in months (up to 27 months).