Multispectral radiometer to measure crop canopy characteristics
نویسندگان
چکیده
منابع مشابه
Estimating Crop Development Stages from Multispectral Data
Accurate prediction of crop yields requires knowledge of the crop's develop-ment stage at critical times during the growing season. Various meteorological models have been developed to estimate crop development. However, the crop planting date, or equivalently, the date the crop reaches a particular crop devel-· opment stage generally is needed to ini-· tialize these models. Recently, efforts h...
متن کاملUse of coupled canopy structure dynamic and radiative transfer models to estimate biophysical canopy characteristics
Leaf area index (LAI) is a key variable for the understanding of several eco-physiological processes within a vegetation canopy. The LAI could thus provide vital information for the management of the environment and agricultural practices when estimated continuously over time and space thanks to remote sensing sensors. This study proposed a method to estimate LAI spatial and temporal variation ...
متن کاملEstimating cotton evapotranspiration crop coefficients with a multispectral vegetation index
Crop coefficients are a widely used and universally accepted method for estimating the crop evapotranspiration (ETc) component in irrigation scheduling programs. However, uncertainties of generalized basal crop coefficient (Kcb) curves can contribute to ETc estimates that are substantially different from actual ETc. Limited research with corn has shown improvements to irrigation scheduling due ...
متن کاملRetrieval of Biophysical Crop Variables from Multi-Angular Canopy Spectroscopy
The future German Environmental Mapping and Analysis Program (EnMAP) mission, due to launch in late 2019, will deliver high resolution hyperspectral data from space and will thus contribute to a better monitoring of the dynamic surface of the earth. Exploiting the satellite’s ±30◦ across-track pointing capabilities will allow for the collection of hyperspectral time-series of homogeneous qualit...
متن کاملWoody-to-total area ratio determination with a multispectral canopy imager.
Leaf area index (LAI) - defined as one half of the total green leaf area per unit ground surface area - can be determined by direct or indirect methods. Three major sources of errors exist in indirect LAI measurements: within-shoot clumping, beyond-shoot clumping and non-photosynthetic components. The effect of non-photosynthetic components on LAI measurements can be described by the woody-to-t...
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ژورنال
عنوان ژورنال: Review of Scientific Instruments
سال: 1983
ISSN: 0034-6748,1089-7623
DOI: 10.1063/1.1137398