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Home → Publications → Tree Planters' Notes → Tree Planters' Notes Volume 19, Number 3 (1968) → A Simple Device for Sowing Experimental Seed Lots at Uniform Spacing

A Simple Device for Sowing Experimental Seed Lots at Uniform Spacing

Uniform spacing of seed in a seedbed is important in many forest research projects. When using large numbers of seeds, the sowing operation can be both tedious and costly. A sowing device was designed and constructed to facilitate the sowing of seed for a Douglas-fir prove- nance experiment. Five rows of 46 holes each (7/16 inch diameter) were drilled simultaneously through two sheets of plexiglass clamped together (top sheet 24 by 41 by 1/8 inch, bottom sheet 25 by 43 by 3/16 inch). This allowed 230 seeds to be sown each time. The distance between rows was 5 inches, and the distance between hole centers was 7/8 inch. After drilling, the bottom sheet was fastened to a wooden frame made of 3/4- by 1-inch stock. A plexiglass strip 1 by 1/8 inch was fastened to the bottom sheet, flush with the edge. This strip served as a guide to hold the top sheet in place during loading and to aline it during unloading.


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Author(s): R. L. Schmidt

Publication: Tree Planters' Notes - Volume 19, Number 3 (1968)

Volume: 19

Number: 3