Background

The density at which seed is sown influences dry bean yield. Studies with other row crops have shown that crop competitiveness can be increased by reducing row spacing and increasing plant density (Goulden 1976). Growers are nowadays interested in narrow row dry bean production that allows them to use the same seeding and harvesting equipment that they use for cereals. Narrow row dry bean production, however, may preclude or greatly inhibit inter-row cultivation to control weeds. The aim of the current study was to determine the effect of varying the density at which dry bean seeds were planted, with or without nitrogen fertiliser, on dry bean growth, yield and seed quality.