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Spectral reflectance ratio of rice canopy for estimating crop nitrogen status

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Abstract

A portable meter for measuring the intensity of the green color of a rice canopy in the field by using spectral reflectance at 550 and 800 nm was newly devised. The measurements were found to be affected by reflection of sunshine on the leaf surface. With such limitations being taken into account, rice canopy green color intensity could be evaluated with this meter.

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Authors and Affiliations

  1. Department of Soils and Fertilizers, National Agriculture Research Center, Kannondai, 305, Tsukuba, Ibaraki, Japan

    M. Takebe, T. Yoneyama & T. Murakami

  2. Sand Dune Research Institute, Tottori University, 680, Hamasaka, Tottori, Japan

    K. Inada

Authors
  1. M. Takebe
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  2. T. Yoneyama
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  3. K. Inada
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  4. T. Murakami
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Takebe, M., Yoneyama, T., Inada, K. et al. Spectral reflectance ratio of rice canopy for estimating crop nitrogen status. Plant Soil 122, 295–297 (1990). https://doi.org/10.1007/BF02851988

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  • DOI: https://doi.org/10.1007/BF02851988

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