caa a22 4500 445864605 CHVBK 20180317145454.0 cr unu---uuuuu 170323e20110801xx s 000 0 eng 10.1007/s11119-010-9199-9 doi (NATIONALLICENCE)springer-10.1007/s11119-010-9199-9 Estimating off-rate pesticide application errors resulting from agricultural sprayer turning movements [Elektronische Daten] [Joe Luck, Santosh Pitla, Rodrigo Zandonadi, Michael Sama, Scott Shearer] Pesticide application is an essential practice on many U.S. crop farms. Off-rate pesticide application errors may result from velocity differential across the spray boom while turning, pressure fluctuations across the spray boom, or changes in boom-to-canopy height due to undulating terrain. The sprayer path co-ordinates and the status (on or off) of each boom control section were recorded using the sprayer control console which provided map-based automatic boom section control. These data were collected for ten fields of varying shapes and sizes located in central Kentucky. In order to estimate potential errors resulting from sprayer turning movements, a method was developed to compare the differences in application areas between spray boom control sections. The area covered by the center boom control section was considered the "target rate area” and the difference in these areas and the areas covered by remaining control sections were compared to estimate application rate errors. The results of this analysis conducted with sprayer application files collected from ten fields, many containing impassable grassed waterways, indicated that a substantial portion of the fields (6.5-23.8%) could have received application in error by more than ±10% of the target rate. Off-rate application errors exceeding ±10% of the target rate for the study fields tended to increase as the average turning angles increased. The implication of this is that producers may be unintentionally applying at off-label rates in fields of varying shapes and sizes where turning movements are required. Springer Science+Business Media, LLC, 2010 Precision spraying nationallicence No-till farming nationallicence Variable-rate application nationallicence Chemical application nationallicence Spray boom nationallicence Luck Joe Department of Biosystems and Agricultural Engineering, University of Kentucky, 128 C.E. Barnhart Building, 40546-0276, Lexington, KY, USA aut Pitla Santosh Department of Biosystems and Agricultural Engineering, University of Kentucky, 128 C.E. Barnhart Building, 40546-0276, Lexington, KY, USA aut Zandonadi Rodrigo Department of Biosystems and Agricultural Engineering, University of Kentucky, 128 C.E. Barnhart Building, 40546-0276, Lexington, KY, USA aut Sama Michael Department of Biosystems and Agricultural Engineering, University of Kentucky, 128 C.E. Barnhart Building, 40546-0276, Lexington, KY, USA aut Shearer Scott Department of Biosystems and Agricultural Engineering, University of Kentucky, 128 C.E. Barnhart Building, 40546-0276, Lexington, KY, USA aut Precision Agriculture Springer US; http://www.springer-ny.com 12/4(2011-08-01), 534-545 1385-2256 12:4<534 2011 12 11119 https://doi.org/10.1007/s11119-010-9199-9 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11119-010-9199-9 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Luck Joe Department of Biosystems and Agricultural Engineering, University of Kentucky, 128 C.E. Barnhart Building, 40546-0276, Lexington, KY, USA aut NATIONALLICENCE 700 1- Pitla Santosh Department of Biosystems and Agricultural Engineering, University of Kentucky, 128 C.E. Barnhart Building, 40546-0276, Lexington, KY, USA aut NATIONALLICENCE 700 1- Zandonadi Rodrigo Department of Biosystems and Agricultural Engineering, University of Kentucky, 128 C.E. Barnhart Building, 40546-0276, Lexington, KY, USA aut NATIONALLICENCE 700 1- Sama Michael Department of Biosystems and Agricultural Engineering, University of Kentucky, 128 C.E. Barnhart Building, 40546-0276, Lexington, KY, USA aut NATIONALLICENCE 700 1- Shearer Scott Department of Biosystems and Agricultural Engineering, University of Kentucky, 128 C.E. Barnhart Building, 40546-0276, Lexington, KY, USA aut NATIONALLICENCE 773 0- Precision Agriculture Springer US; http://www.springer-ny.com 12/4(2011-08-01), 534-545 1385-2256 12:4<534 2011 12 11119 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer