NDLI: A method to generate and use as-applied surfaces to evaluate variable-rate fertilizer applications

Content Provider	Springer Nature Link
Author	Fulton, John P. Shearer, Scott A. Higgins, Steve F. McDonald, Timothy P.
Copyright Year	2012
Abstract	Variable-rate technology (VRT) has been used by farmers in an attempt to better match inputs to local growing conditions. In theory, VRT minimizes over- and under-application of inputs. However, the limitations and errors of this technology have not been well documented. Further, standard methods for quantifying the application accuracy using VRT do not currently exist, limiting practitioners’ knowledge on performance. Therefore, a spatial data model was developed to generate “as-applied” surfaces as a means to evaluate VRT performance of two applicators. The spatial data model uses geographic information system functionality to merge applicator descriptive patterns with a field application file to generate an ‘as-applied’ surface map representing not only the actual deposition of granular fertilizer but more importantly spatial distribution. Field data were collected and used to validate the spatial model. Comparisons between the actual and predicted application rates indicated moderate to good correlations (0.62 < R < 0.88) for two applicators. Longitudinal offset such as for a global positioning system receiver impacted model performance for one applicator but not the other. A comparison of the actual application rates to the prescription maps illustrated the inconsistency of VRT performance to deliver target rates. Both applicators were only within 10 % of the target rates a small percentage of time (<45 %) during field operation. Generated as-applied surface maps highlighted errors associated with VRT along with limitations of the technology within site-specific management (SSM). Thus, as-applied surface maps provide a means to properly evaluate VRT while enhancing researchers’ and practitioners’ abilities to compare and customize SSM approaches.
Starting Page	184
Ending Page	200
Page Count	17
File Format	PDF
ISSN	13852256
Journal	Precision Agriculture
Volume Number	14
Issue Number	2
e-ISSN	15731618
Language	English
Publisher	Springer US
Publisher Date	2012-09-25
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Precision farming Spinner disc spreader Distribution patterns Variable-rate technology Application errors Agriculture Soil Science & Conservation Remote Sensing/Photogrammetry Statistics for Engineering, Physics, Computer Science, Chemistry and Earth Sciences Meteorology/Climatology
Content Type	Text
Resource Type	Article
Subject	Agricultural and Biological Sciences

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Zone mapping application for precision-farming: a decision support tool for variable rate application

Estimating off-rate pesticide application errors resulting from agricultural sprayer turning movements

Interdisciplinary Irrigated Precision Farming Research

Error Sources on Yield-Based Fertilizer Variable Rate Application Maps

Maize Nitrogen Response as Affected by Soil Type and Drainage Variability

Error Sources Affecting Variable Rate Application of Nitrogen Fertilizer

Evaluating Farmer Defined Management Zone Maps for Variable Rate Fertilizer Application

Simulation of Cotton Production for Precision Farming

Perceived importance of precision farming technologies in improving phosphorus and potassium efficiency in cotton production

A method to generate and use as-applied surfaces to evaluate variable-rate fertilizer applications

Similar Documents

Zone mapping application for precision-farming: a decision support tool for variable rate application

Estimating off-rate pesticide application errors resulting from agricultural sprayer turning movements

Interdisciplinary Irrigated Precision Farming Research

Error Sources on Yield-Based Fertilizer Variable Rate Application Maps

Maize Nitrogen Response as Affected by Soil Type and Drainage Variability

Error Sources Affecting Variable Rate Application of Nitrogen Fertilizer

Evaluating Farmer Defined Management Zone Maps for Variable Rate Fertilizer Application

Simulation of Cotton Production for Precision Farming

Perceived importance of precision farming technologies in improving phosphorus and potassium efficiency in cotton production

A method to generate and use as-applied surfaces to evaluate variable-rate fertilizer applications