Dry matter crop yield in kg ha1
(SD) and relative crop yield calculated over the entire measurement period. Data are arithmetic means (SD). Data with the same letter(s) in
a column are not significantly different (Scheffé's test, p < 0.05) from each other. Treatments NF+ and NF are not included in the statistical tests and in the calculation of the
mean DM crop yield (DM: dry matter, FYM: farmyard manure; VFG: vegetable, fruit and garden waste compost; CMC1: farm compost with low C/N; CMC2: farm compost with
high C/N; CSL: cattle slurry; MIN: only mineral fertilizers; NF+: no fertilizer; NF: fallow).