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A Vacuum Multi-point Seeder for Pots


Many horticultural studies require precise placement of numerous seeds in individual pots of soil. In my experiments on the relationship of inoculum densities of plant parasitics nematodes to alfalfa (Medicago sativa L.) seedling stand and growth (1), and the efficacy of a nematicide applied to alfalfa seeds (2), 20 seeds were planted per pot of soil. This seeding was tedious and time-consuming. Seeding time was reduced somewhat with the use of a multi-point dibble that made 20 evenly spaced depressions in the surface of the soil in 11.5 cm diameter styrofoam pots. However an alfalfa seed still had to be placed in each depression using forceps, the most time-consuming phase of planting. The vacuum multi-point seeder was developed to simplify these operations.