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A punch planter with adjustable seed spacing

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.org

Citation:  Paper number  021174,  2002 ASAE Annual Meeting . (doi: 10.13031/2013.9694) @2002
Authors:   J. P. MOLIN
Keywords:   Planters, Punch planter, Seed spacing, No-till, Corn

Some attempts have been made trying to implement different approaches for seed placement into the soil for no-till systems, avoiding coulters and their accessories that still present problems working on crop residue. Punch planting is one of the possibilities, but is limited on seed spacing adjustment. A prototype was developed based on previous works and consists on a punch wheel that has the ability to adjust its diameter so the tips will change the distance, producing seed spacing that may vary from 0.16 to 0.21m. The idea is based on a set of two plates with opposite spiral slots and a third plate with radial slots in between those two. With an external effort the punches attached to the sliding plates will expand or contract. The prototype was built and required also a personalized vacuum seed meter. Test shown it feasible as the accessories and seed meter are implemented.

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