Journal
JOURNAL OF INTELLIGENT & ROBOTIC SYSTEMS
Volume 96, Issue 3-4, Pages 573-589Publisher
SPRINGER
DOI: 10.1007/s10846-019-01001-5
Keywords
UAV-based precision agriculture; Multispectral imagery; Biomass estimation; Vegetation indices
Funding
- COLCIENCIAS [120371551916]
- FONDO NACIONAL DE FINANCIAMIENTO PARA LA CIENCIA, LA TECNOLOGIA Y LA INNOVACION - FRANCISCO JOSE DE CALDAS [CT167-2016]
- OMICAS program: Optimizacion n Multiescala In-silico de Cultivos Agricolas Sostenibles (Infraestructura y validacion en Arroz y Cana de Azucar)
- Colombian Scientific Ecosystem by The WORLD BANK
- COLCIENCIAS
- ICE-TEX
- Colombian Ministry of Education
- Colombian Ministry of Industry and Turism [FP44842-217-2018]
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This paper presents a high-throughput method for Above Ground Estimation of Biomass (AGBE) in rice using multispectral near-infrared (NIR) imagery captured at different scales of the crop. By developing an integrated aerial crop monitoring solution using an Unmanned Aerial Vehicle (UAV), our approach calculates 7 vegetation indices that are combined in the form of multivariable regressions depending on the stage of rice growth: vegetative, reproductive or ripening. We model the relationship of these vegetation indices to estimate the biomass of a certain crop area. The methods are calibrated by using a minimum sampling area of 1 linear meter of the crop. Comprehensive experimental tests have been carried out over two different rice varieties under upland and lowland rice production systems. Results show that the proposed approach is able to estimate the biomass of large areas of the crop with an average correlation of 0.76 compared with the traditional manual destructive method. To our knowledge, this is the first work that uses a small sampling area of 1 linear meter to calibrate and validate NIR image-based estimations of biomass in rice crops.
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