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Subsurface Sweep for Applying Herbicides 1
Author(s) -
Reid J. T.,
Peacock H. A.
Publication year - 1973
Publication title -
agronomy journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.752
H-Index - 131
eISSN - 1435-0645
pISSN - 0002-1962
DOI - 10.2134/agronj1973.00021962006500060046x
Subject(s) - sowing , seeding , gossypium hirsutum , agronomy , nozzle , cyperus rotundus , environmental science , yield (engineering) , mathematics , materials science , biology , physics , composite material , thermodynamics
Subsurface sweep applicators were designed and constructed using commercially available sweeps (25.4 cm wide) and spray nozzles. Performance was satisfactory, both in a replicated Upland cotton ( Gossypium hirsutum L.) test and in a general field planting. Purple nutsedge ( Cyperus rotundus L.) control was excellent, and there was a slight but nonsignificant increase in cotton yield. Precision placement of EPTC ( S ‐ethyl dipropylthiocarbamate) in both the horizontal and vertical planes was obtained with minimum disturbance to the profile of the finished seed‐bed. The device placed a 25.4‐cm‐wide band 5.1 cm under the soil surface. However, the same construction method could be used to make sweeps for other widths and depths of placement. Proper arrangement of the sweeps on a tool bar or cultivator can provide either band or broadcast coverage.