Development of sensor based detection of crop nitrogen status for utilization in variable rate nitrogen fertilization

J.J. Varco; A.A. Fox; T.B. Raper; K.J. Hubbard

Development of sensor based detection of crop nitrogen status for utilization in variable rate nitrogen fertilization

In: Precision agriculture '13

Authors:

J.J. Varco

J.J. Varco ¹Plant and Soil Sciences Dept. Mississippi State Univ., Mississippi State, MS 39762, USA; jvarco@pss.msstate.edu

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A.A. Fox

A.A. Fox ¹Plant and Soil Sciences Dept. Mississippi State Univ., Mississippi State, MS 39762, USA; jvarco@pss.msstate.edu

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T.B. Raper

T.B. Raper ²Crop, Soil, and Environmental Sciences Dept. University of Arkansas, Fayetteville, AR 72701, USA

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K.J. Hubbard

K.J. Hubbard ³Dept. of Soil Science, University of Wisconsin, Madison, WI 53706, USA

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Type:: Chapter

Pages:: 145–150

DOI:: https://doi.org/10.3920/9789086867783_018

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Early season detection of corn (Zea mays L.) and cotton (Gossypium hirsutum L.) N status as an in-field indicator of spatial N availability and fertilizer N demand has been difficult with proximal sensors. The objective of this research was to evaluate selected vegetation indices (VI) for their ability to detect early season crop N status in cotton and corn. A tractor mounted sensor was used to acquire canopy reflectance at an oblique angle and selected VIs were related to cotton leaf N during early flower bud formation, and corn leaf and whole plant tissue N concentrations and whole plant N content at 6 fully collared leaves. Indices utilizing a red edge component were the most consistent and resulted in stronger relationships to plant tissue N concentration for early season sampling.

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Precision agriculture '13

E-Book ISBN:: 9789086867783

Publisher:: Brill | Wageningen Academic

Print Publication Date:: 01 Nov 2013

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Development of sensor based detection of crop nitrogen status for utilization in variable rate nitrogen fertilization

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Precision agriculture '13

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