Site-specific treatment responses in on-farm precision experimentation

R. G. Trevisan, D. S. Bullock, N. F. Martin

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

There is a large body of research on characterizing field variability of soil characteristics and their impact on crop yields. In contrast, site-specific information about crop responses to agronomic treatments is less frequent. On-farm precision experimentation (OFPE) brings important information to understand the spatial variation of crop response to agronomic practices and thus to improve agronomic decisions. The objective of this work was to investigate the spatial variability of corn yield responses to nitrogen and seed rates using OFPE in four fields in the US Midwest. Geographically-weighted regression was applied to generate local regression coefficients, which were used to delineate response zones in each field. The results showed the existence of great potential to adjust the rates of these inputs according to the response of each zone identified by the proposed method. The results of this study can be applied to re-evaluate expectations on variable rate prescriptions guided largely by soil and variability.

Original languageEnglish (US)
Title of host publicationPrecision Agriculture 2019 - Papers Presented at the 12th European Conference on Precision Agriculture, ECPA 2019
EditorsJohn V. Stafford
PublisherWageningen Academic Publishers
Pages925-931
Number of pages7
ISBN (Electronic)9789086863372
DOIs
StatePublished - Jan 1 2019
Event12th European Conference on Precision Agriculture, ECPA 2019 - Montpellier, France
Duration: Jul 8 2019Jul 11 2019

Publication series

NamePrecision Agriculture 2019 - Papers Presented at the 12th European Conference on Precision Agriculture, ECPA 2019

Conference

Conference12th European Conference on Precision Agriculture, ECPA 2019
CountryFrance
CityMontpellier
Period7/8/197/11/19

Keywords

  • Chessboard design
  • Geographically-weighted regression
  • Nitrogen
  • Yield response functions
  • Zea mays L

ASJC Scopus subject areas

  • Agronomy and Crop Science
  • Computer Science Applications

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  • Cite this

    Trevisan, R. G., Bullock, D. S., & Martin, N. F. (2019). Site-specific treatment responses in on-farm precision experimentation. In J. V. Stafford (Ed.), Precision Agriculture 2019 - Papers Presented at the 12th European Conference on Precision Agriculture, ECPA 2019 (pp. 925-931). (Precision Agriculture 2019 - Papers Presented at the 12th European Conference on Precision Agriculture, ECPA 2019). Wageningen Academic Publishers. https://doi.org/10.3920/978-90-8686-888-9_114