Estimation of crop growth from optical and microwave soil cover

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Abstract
Direct derivation of biomass from radar backscattering gives erratic results so this paper discusses another method in which biomass was not estimated directly but was found as the accumulated value of the estimated crop growth rate. The estimation was based on soil crop cover and global radiation. The relationship between soil cover in the optical and microwave regions was investigated. Analysis of the methodology showed that improvement is obtained in comparison with the direct estimation method. Despite variation in parameters for different years, a remarkable consistency in estimated biomass was observed. Nevertheless, measurements of radar backscattering still suffer from too much variation to be reliable for biomass estimation.

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