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Synopsis: Two recently developed sod-seeder openers have produced successful establishment of a small-seeded legume (birdsfoot trefoil) in an old establshed bluegrass sward. Both were superior to the conventional opener which left only a narrow slit in the sod. The use of a presswheel improved establishment following the disk but not the wing opener. Granular heptachlor over the row at seeding resulted in improved stands one out of two years.
2 Associate Professor of Agronomy, University of Maryland, Research Agricultural Engineer, AERD, ARS, USDA, and former graduate student, Department of Agronomy, University of Maryland (now Research Agronomist, N.S.W. Department of Agriculture, Australia), respectively.
Received for publication September 3, 1963.
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