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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Canopy sensor placement for variable-rate nitrogen application in sugarcane fields

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Amaral, Lucas R. [1] ; Trevisan, Rodrigo G. [2] ; Molin, Jose P. [2]
Total Authors: 3
[1] Univ Estadual Campinas, Sch Agr Engn, Campinas, SP - Brazil
[2] Univ Sao Paulo, Luiz de Queiroz Coll Agr, Dept Biosyst Engn, Precis Agr Lab, Piracicaba, SP - Brazil
Total Affiliations: 2
Document type: Journal article
Source: PRECISION AGRICULTURE; v. 19, n. 1, p. 147-160, FEB 2018.
Web of Science Citations: 5

Nitrogen (N) fertilization is challenging for sugarcane, and machine-based canopy sensors appear as an alternative to allow variable-rate N fertilization. Top or sidedressing N is applied in each crop row and crop spatial variability behavior must be understood to allow proper sensor placement and applicator configurations in order to optimize N fertilization. Thus, the goal of this study was to investigate sugarcane crop variability and N prescription error when working with various sensor placements and boom sections. The approaches involved post-processing N prescription maps and real-time application, varying the number of sensors used and calculating the N rate for the applicator boom sections. Sugarcane fields show high crop variability due to their semi-perennial cropping system, which causes unpredictability of sensor readings from adjacent rows, ideally suggesting one sensor for each row in order to obtain more detailed plant-vigor information. Moreover, the machine must be able to apply fertilizer for each individual row to allow the most reliable application of N rate, ensuring optimization of crop response to variable-rate N application. (AU)

FAPESP's process: 09/03372-0 - Sugar cane nitrogen fertilization management using ground active optical sensor
Grantee:Lucas Rios Do Amaral
Support type: Scholarships in Brazil - Master
FAPESP's process: 11/08882-7 - Sugarcane nitrogen fertilization management at variable rates supported by ground optical sensors
Grantee:Lucas Rios Do Amaral
Support type: Scholarships in Brazil - Doctorate