Mechanical (disc harrow, rotary cultivator, off-set rotary shredder), chemical (herbicide) and hand hoe weeding are compared in a coffee crop grown on a latosol. After ten years there was no significant yield difference among the treatments. There was however, visible signs of erosion due to the use of disc-harrow, rotary cultivator, and herbicide.
agricultural mechanization; agricultural machinery; tillage machine; mechanical tillage; weed control; coffee crop