Evaluation of Application Accuracy and Performance of a Hydraulically Operated Variable-Rate Aerial Application System

2009 ◽  
Vol 52 (3) ◽  
pp. 715-722 ◽  
Author(s):  
S. J. Thomson ◽  
L. A. Smith ◽  
J. E. Hanks
Keyword(s):  
Variable Rate ◽  
Aerial Application ◽  
Application System ◽  
And Performance

Integration of Aerial Imaging and Variable-Rate Technology for Site-Specific Aerial Herbicide Application

2017 ◽  
Vol 60 (3) ◽  
pp. 635-644
Author(s):  
Chenghai Yang ◽  
Daniel E. Martin
Keyword(s):  
Imaging System ◽  
Effective Control ◽  
Variable Rate ◽  
Herbicide Application ◽  
Aerial Application ◽  
Application System ◽  
Site Specific ◽  
Variable Rate Technology ◽  
Application Systems ◽  
Airborne Imaging

Abstract. As remote sensing and variable-rate technology are becoming more available for aerial applicators, practical methodologies for effective integration of these technologies are needed for site-specific aerial applications of crop production and protection materials. The objectives of this study were to demonstrate how to integrate an airborne multispectral imaging system and an IntelliStar variable-rate aerial application system for site-specific management of the winter weed henbit. The airborne imaging system was used to acquire natural color and near-infrared (NIR) images of a fallow field near College Station, Texas, for mapping the infestation of henbit shortly before herbicide application. The images were then rectified, classified, and converted to a binary prescription map with the full application rate on infested areas and the zero rate on non-infested areas. The variable-rate aerial application system mounted on an agricultural aircraft was used to apply glyphosate over the field based on the prescription map. Airborne imagery was collected 14 days after the herbicide application. The as-applied map along with the prescription map and the post-application imagery were used to assess the performance of the site-specific application. Spatial and statistical analysis results showed that the imaging system was effective for mapping henbit infestations and for assessing the performance of site-specific herbicide application, and that the variable-rate system accurately delivered the product at the desired rate to the prescribed areas for effective control of the weed. The methodology and results from this study will be useful for aerial applicators to incorporate airborne imaging and variable-rate application systems into their aerial application business to increase their capabilities and profits. Keywords: Aerial application, As-applied map, Henbit, Imaging system, Prescription map, Variable-rate technology.

Improving flow response of a variable-rate aerial application system by interactive refinement

2010 ◽  
Vol 73 (1) ◽  
pp. 99-104 ◽  
Author(s):  
Steven J. Thomson ◽  
Yanbo Huang ◽  
James E. Hanks ◽  
Daniel E. Martin ◽  
Lowrey A. Smith
Keyword(s):  
Variable Rate ◽  
Aerial Application ◽  
Application System ◽  
Flow Response

scholarly journals Spray Deposition on Weeds (Palmer Amaranth and Morningglory) from a Remotely Piloted Aerial Application System and Backpack Sprayer

Drones ◽  
2020 ◽  
Vol 4 (3) ◽  
pp. 59
Author(s):  
Daniel Martin ◽  
Vijay Singh ◽  
Mohamed A. Latheef ◽  
Muthukumar Bagavathiannan
Keyword(s):  
Spray Deposition ◽  
Tap Water ◽  
Application Rate ◽  
Palmer Amaranth ◽  
Test Results ◽  
Herbicide Application ◽  
Aerial Application ◽  
Spray Droplet ◽  
Application System ◽  
Leaf Surfaces

This study was designed to determine whether a remotely piloted aerial application system (RPAAS) could be used in lieu of a backpack sprayer for post-emergence herbicide application. Consequent to this objective, a spray mixture of tap water and fluorescent dye was applied on Palmer amaranth and ivyleaf morningglory using an RPAAS at 18.7 and 37.4 L·ha−1 and a CO2-pressurized backpack sprayer at a 140 L·ha−1 spray application rate. Spray efficiency (the proportion of applied spray collected on an artificial sampler) for the RPAAS treatments was comparable to that for the backpack sprayer. Fluorescent spray droplet density was significantly higher on the adaxial surface for the backpack sprayer treatment than that for the RPAAS platforms. The percent of spray droplets on the abaxial surface for the RPAAS aircraft at 37.4 L·ha−1 was 4-fold greater than that for the backpack sprayer at 140 L·ha−1. The increased spray deposition on the abaxial leaf surfaces was likely caused by rotor downwash and wind turbulence generated by the RPAAS which caused leaf fluttering. This improved spray deposition may help increase the efficacy of contact herbicides. Test results indicated that RPAASs may be used for herbicide application in lieu of conventional backpack sprayers.

Remote sensing mapping of soil and plants as basis for a variable-rate nutrient application system

2004 ◽  
Author(s):  
Bent S. Bennedsen ◽  
Lene K. Christensen ◽  
Anders Pedersen ◽  
Lars S. Jensen ◽  
Niels E. Nielsen
Keyword(s):  
Remote Sensing ◽  
Variable Rate ◽  
Application System ◽  
Remote Sensing Mapping
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