INTEGRATING GIS AND GPS INTO A SPATIALLY VARIABLE RATE HERBICIDE APPLICATION SYSTEM

1999 ◽  
Vol 15 (4) ◽  
pp. 255-262 ◽  
Author(s):  
K. A. Al-Gaadi ◽  
P. D. Ayers
Keyword(s):  
Variable Rate ◽  
Herbicide Application ◽  
Application System

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.

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.

A FEASIBILITY STUDY OF DIRECT INJECTION FOR VARIABLE-RATE HERBICIDE APPLICATION

1998 ◽  
Vol 41 (2) ◽  
pp. 291-299 ◽  
Author(s):  
W. Qiu ◽  
G. A. Watkins ◽  
C. J. Sobolik ◽  
S. A. Shearer
Keyword(s):  
Feasibility Study ◽  
Direct Injection ◽  
Variable Rate ◽  
Herbicide Application

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

scholarly journals Changes in Application System - Influence on Herbicides Residue in Soil and Sugar Beet Roots

2009 ◽  
Vol 49 (4) ◽  
pp. 421-425 ◽  
Author(s):  
Mariusz Kucharski
Keyword(s):  
Sugar Beet ◽  
Bare Soil ◽  
Herbicide Application ◽  
Application System ◽  
Herbicide Residues ◽  
Beet Root ◽  
System A ◽  
Herbicide Mixture ◽  
Sugar Beet Root ◽  
Mixture System

Changes in Application System - Influence on Herbicides Residue in Soil and Sugar Beet RootsThe aim of performed investigation was to evaluate the influence of changes in herbicide application system on herbicide residues in soil and sugar beet roots. Chemical weed control in sugar beet was carried out by herbicides that included substances such as phenmedipham, desmedipham, ethofumesate, metamitron, triflusulfuron and surfactant adjuvant applied in three different systems: two times application at bare soil (preemergence) and postemergence application (weeds in phase of 2-4 leaves) - system "A", 3 times split, postemergence application (full dose of herbicide mixture) - system "B" and 4 times application at 7 to 10 day intervals starting at the beginning of weed emergence - system "C". Samples of soil and roots of sugar beet were taken at the day of lifting. Herbicide residues were analysed using HPLC with UV-detection. At lifting time, in soil samples, where herbicides were applied in system "A", the residues of metamitron amounted from 0.0097 to 0.0132 mg/kg. Sum of all detected residues of applied substances amounted 0.0341-0.0458 mg/kg. In sugar beet root samples, the residues amounted to respectively, 0.0049-0.0064 and 0.0136-0.0247 mg/kg. The application of herbicides in "B" and "C" systems caused a significant decrease of residues by about 50% (system "B") and 65% (system "C") on average, in comparison with results obtained for herbicide application in "A" system. Residues of active substances determined in roots of sugar beet did not exceed acceptable limits (MRLs).

Optimisation of soil VIS–NIR sensor-based variable rate application system of soil phosphorus

2007 ◽  
Vol 94 (1) ◽  
pp. 239-250 ◽  
Author(s):  
M.R. Maleki ◽  
A.M. Mouazen ◽  
H. Ramon ◽  
J. De Baerdemaeker
Keyword(s):  
Soil Phosphorus ◽  
Variable Rate ◽  
Application System ◽  
Variable Rate Application
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