scholarly journals Evaluating management zone maps for variable rate fungicide application and selective harvest

2018 ◽  
Vol 153 ◽  
pp. 202-212 ◽  
Author(s):  
Rebecca L. Whetton ◽  
Toby W. Waine ◽  
Abdul M. Mouazen
Keyword(s):  
Variable Rate ◽  
Fungicide Application ◽  
Management Zone ◽  
Selective Harvest

Sensor-based variable-rate fungicide application in winter wheat

2016 ◽  
Vol 72 (10) ◽  
pp. 1888-1896 ◽  
Author(s):  
Maria Tackenberg ◽  
Christa Volkmar ◽  
Karl-Heinz Dammer
Keyword(s):  
Winter Wheat ◽  
Variable Rate ◽  
Fungicide Application

scholarly journals Evaluating the Returns to Variable Rate Nitrogen Application

2000 ◽  
Vol 32 (1) ◽  
pp. 133-143 ◽  
Author(s):  
Roland K. Roberts ◽  
Burton C. English ◽  
S.B. Mahajanashetti
Keyword(s):  
Information Needs ◽  
Precision Farming ◽  
Yield Response ◽  
Variable Rate ◽  
Nitrogen Application ◽  
Management Zones ◽  
Management Zone ◽  
Potential Benefits ◽  
The Cost ◽  
Input Prices

AbstractPotential benefits of variable rate nitrogen application are illustrated and information needs identified. Lower costs of precision farming services, higher crop prices, and greater divergence in yield response potentials across management zones reduce the spatial variability required for profitable variable rate application. Information needs include identification and measurement of management zones within a field and estimation of management zone yield response functions, crop and input prices, and the cost of precision farming services.

Impact of sensor-controlled variable-rate fungicide application on yield, senescence and disease occurrence in winter wheat fields

2018 ◽  
Vol 74 (6) ◽  
pp. 1251-1258 ◽  
Author(s):  
Maria Tackenberg ◽  
Christa Volkmar ◽  
Michael Schirrmann ◽  
Antje Giebel ◽  
Karl-Heinz Dammer
Keyword(s):  
Winter Wheat ◽  
Variable Rate ◽  
Fungicide Application ◽  
Disease Occurrence

Site-Specific Management of Cotton Root Rot Using Airborne and High-Resolution Satellite Imagery and Variable-Rate Technology

2018 ◽  
Vol 61 (3) ◽  
pp. 849-858 ◽  
Author(s):  
Chenghai Yang ◽  
Gary N. Odvody ◽  
J. Alex Thomasson ◽  
Thomas Isakeit ◽  
Richard R. Minzenmayer ◽  
...  
Keyword(s):  
High Resolution ◽  
Satellite Imagery ◽  
Root Rot ◽  
Field Experiments ◽  
Variable Rate ◽  
Site Specific ◽  
Variable Rate Technology ◽  
Fungicide Application ◽  
Cotton Root ◽  
High Resolution Satellite Imagery

Abstract. Cotton root rot is a century-old cotton disease that now can be effectively controlled with Topguard Terra fungicide. Because this disease tends to occur in the same general areas within fields in recurring years, site-specific application of the fungicide only to infested areas can be as effective as and considerably more economical than uniform application. The overall objective of this research was to demonstrate how site-specific fungicide application could be implemented based on historical remote sensing imagery and using variable-rate technology. Procedures were developed for creating binary prescription maps from historical airborne and high-resolution satellite imagery. Two different variable-rate liquid control systems were adapted to two existing cotton planters, respectively, for site-specific fungicide application at planting. One system was used for site-specific application on multiple fields in 2015 and 2016 near Edroy, Texas, and the other system was used on multiple fields in both years near San Angelo, Texas. Airborne multispectral imagery taken during the two growing seasons was used to monitor the performance of the site-specific treatments. Results based on prescription maps derived from historical airborne and satellite imagery of two fields in 2015 and one field in 2016 are reported in this article. Two years of field experiments showed that the prescription maps and the variable-rate systems performed well and that site-specific fungicide treatments effectively controlled cotton root rot. Reduction in fungicide use was 41%, 43%, and 63% for the three fields, respectively. The methodologies and results of this research will provide cotton growers, crop consultants, and agricultural dealers with practical guidelines for implementing site-specific fungicide application using historical imagery and variable-rate technology for effective management of cotton root rot. Keywords: Airborne imagery, Cotton root rot, High-resolution satellite imagery, Prescription map, Variable-rate application.

Design and experiment of a subsoiling variable rate fertilization machine

2020 ◽  
Vol 13 (4) ◽  
pp. 118-124
Author(s):  
Jiangtao Qi ◽  
◽  
Xinliang Tian ◽  
Yang Li ◽  
Xuhui Fan ◽  
...  
Keyword(s):  
Variable Rate
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