Capability of the TrueColor Sensor Array for Determining the Nitrogen Supply in Winter Barley ( Hordeum vulgare L.).

Abstract

In agriculture, efforts are being made to reduce pesticides and fertilizers because of the possible negative environmental impacts, high costs, political requirements, and declining social acceptance. With precision farming, significant savings can be achieved by the site-specific application of fertilizers. In contrast to currently available single sensors and camera-based systems, arrays or line sensors provide a suitable spatial resolution without requiring complex signal processing and promise significant potential regarding price and precision. Such systems comprise a cost-effective and compact unit that can be extended to any working width by cascading into arrays. In this study, experiments were performed to evaluate the applicability of a TrueColor sensor array in monitoring the nitrogen supply of winter barley during its growth. This sensor is based on recording the reflectance values in various channels of the CIELab color space: luminosity, green-red, and blue-yellow. The unique selling point of this sensor is the detection of luminosity because only the CIELab color space provides this opportunity. Strong correlations were found between the different reflection channels and the nitrogen level (R² = 0.959), plant coverage (R² = 0.907), and fresh mass yield (R² = 0.866). The fast signal processing allows this sensor to meet stringent demands for the operating speed, spatial resolution, and price structure.

Plant phenotyping relevance

冬オオムギの窒素状態・被覆率・生体重を推定するTrueColorセンサーアレイの適用性を評価しており、植物形質取得とセンサー性能評価が研究の中心である。

Code and data availability

The supplied blocks describe a TrueColor sensor field trial on winter barley with reflectance, coverage, SPAD, and C/N measurements, but contain no public phenotype dataset, image repository, author analysis code, or trained model deposit. The analysis software is described as developed in-house with no availability or

No evidence-backed public reproduction asset is currently recorded.