Crop growth and yield prediction using canopy reflectance – A review
2008
Leelamathi, M. | Rajendran, K.P. | Leo Justin, C Gailce
The reflecting power of crop canopy gets changed with plant species. The reflection from leaves increases with increasing soil salinity, leaf moisture deficit and chlorophyll content. Environmental factors such as soil salinity, moisture availability and nutrient toxicity or its deficiency affects the optical and radiation properties of plants. The reflection in the red spectral region from plant leaves is dependent on the chlorophyll content and in the near infra red spectral region it is dependent on Leaf Area Index and green biomass only. The reflectance increases with senescing of leaves and reduction in chlorophyll content. Pre-harvest estimation of crop yields are important in planning procurement, distribution, import and export of agricultural commodities. The canopy albedo measurements are adequate to delineate the critical periods of crop growth making the technique potentially adoptable to predict crop yield.
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