Estimating nitrogen fertilizer requirements of canola (Brassica napus L.) using sensor-based estimates of yield potential and crop response to nitrogen

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Date
2008-01-18T15:05:00Z
Authors
Holzapfel, Christopher Brian
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Abstract
The feasibility of using optical sensors and non-nitrogen limiting reference crops to determine post-emergent nitrogen fertilizer requirements of canola was evaluated. Normalized difference vegetation index was well suited for estimating yield potential and nitrogen status. Although sensor-based nitrogen management was generally agronomically feasible for canola, the economic benefits of doing so remain uncertain because of the added cost of applying post-emergent nitrogen.
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Keywords
nitrogen use-efficiency, NDVI, post-emergent, variable rate, normalized difference vegetation index, precision agriculture
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