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Evaluating Planter Performance--Cotton Seed Placement Accuracy

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

Citation:  Paper number  031146,  2003 ASAE Annual Meeting . (doi: 10.13031/2013.13748) @2003
Authors:   F. Henry Moody, John H. Hancock, John B. Wilkerson
Keywords:   Evaluation, field test, performance, planters, planting, seeders, seeding

Row crop planter performance was investigated in a field study. Specifically, tests were conducted to quantify intra-row seed spacing variability, and to isolate its sources. A planter was instrumented to allow in-field measurement of seed drop timing at two locations in the seed tube. In addition, seed spacing in the furrow was measured by hand. Tests were conducted while operating the planter at ground speeds of 4.8 km/hr (3.0 mph), 7.2 km/hr (4.5 mph), and 9.7 km/hr (6.0 mph). Seed meter rotational speeds of 0.16, 0.23, and 0.31 rev/s were achieved using a hydraulic drive and controller. Both cotton and corn seeds were planted. Results given in this report are limited to those obtained while planting cotton seeds with a meter rotational speed of 0.16 rev/s. The planter evaluated performed well under those conditions. Quality of Feed Indices ranged from 76.2 to 91.4%. Maximum standard deviation of normally sown seeds was 6.1 cm (2.4 in.). The largest component of spacing variability was introduced above the upper-most seed sensor, possibly by the seed meter. As expected, variability increased as each seed traveled toward its final resting place, however increases were not dramatic. Variability increased with increasing ground speed, as was also expected. Complete results will be forthcoming after additional data analysis.

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