Abstract
ABSTRACT A compressed air system and a seed-gel pump system were designed and built to sow plots of pre-germinated vegetable seeds mixed with a carrier gel. In the compressed air system, the seed-gel mixture was uniformly delivered into a furrow under a constant air pressure and in the seed-gel pump technique, it was con-tinuously extruded by squeezing flexible tubes. A solenoid-operated poppet valve was incorporated in both techniques to drill the mixture at equidistant locations. The performance of the compressed air system was superior to that of the seed-gel pump.
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