Wheat yield population response to variable rate N fertilization strategies using active NDVI sensors

G.J. Schwab; E.M. Pena-Yewtukhiw; O. Wendroth; L.W. Murdock; T. Stombaugh

Wheat yield population response to variable rate N fertilization strategies using active NDVI sensors

In: Precision Agriculture â05

Authors:

G.J. Schwab

G.J. Schwab ¹Department of Plant and Soil Sciences, University of Kentucky, Lexington, KY 40536, USA
gschwab@uky.edu

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E.M. Pena-Yewtukhiw

E.M. Pena-Yewtukhiw ¹Department of Plant and Soil Sciences, University of Kentucky, Lexington, KY 40536, USA

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O. Wendroth

O. Wendroth ¹Department of Plant and Soil Sciences, University of Kentucky, Lexington, KY 40536, USA

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L.W. Murdock

L.W. Murdock ²Department of Plant and Soil Sciences, University of Kentucky, Research and Education Center, Princeton, KY, 42445, USA

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, and

T. Stombaugh

T. Stombaugh ³Department of Biosystems and Agricultural Engineering, University of Kentucky Lexington, KY 40536, USA

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Type:: Chapter

Pages:: 235â242

DOI:: https://doi.org/10.3920/978-90-8686-549-9_029

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The goal of precision agriculture is to vary inputs to match the spatial yield potential of a site, thus minimizing input cost while maximizing economic return to the producer. Historically, the scale of precision fertilization has been limited to the size of the applicator, but innovations have made it possible to variably apply fertilizer on a 0.56 m² basis using field size equipment and active, realtime NDVI sensors. An experiment was conducted in Kentucky, USA to evaluate the effect of different nitrogen fertilization strategies on wheat (cv. Declaration) yield and yield population across a variable landscape. There were four treatments with four replications. Nitrogen fertilizer application was varied on a 0.56 m² grid based on canopy NDVI for two of the treatments, while uniform applications of two rates were the other two treatments. Results indicated that the imposed treatments did not only affect the average yield, but also affected the characteristics of the yield populations and the spatial N use efficiency.

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Precision Agriculture â05

E-Book ISBN:: 9789086865499

Publisher:: Wageningen Academic

Print Publication Date:: 24 Oct 2005

Subjects
- Life Sciences
  - General
  - Agriculture & Environment

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Wheat yield population response to variable rate N fertilization strategies using active NDVI sensors

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