Predicting Wheat Grain and Biomass Yield Using Canopy Reflectance of Booting Stage
作者： S. Pradhan , K. K. Bandyopadhyay , R. N. Sahoo , V. K. Sehgal , R. Singh
DOI: 10.1007/S12524-014-0372-X
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摘要: Field experiment was conducted in a sandy loam soil of Indian Agricultural Research Institute, New Delhi during the year 2011–13 to see effect irrigation, mulch and nitrogen on canopy spectral reflectance indices their use predicting grain biomass yield wheat. The reflectances were measured using hand held ASD FieldSpec Spectroradiometer at booting stage Four (SRIs) viz. RNDVI (Red Normalized Difference Vegetation Index), GNDVI (Green SR (Simple Ratio) WI (Water Index) computed data. Out these four indices, RNDVI, significantly positively related with wheat whereas negatively Calibration second data showed that among SRIs, could account for respectively, 85 % 86 variation least RMSE (395 kg ha−1 (15 %) 1609 (20 yield) highest d index (0.95 0.91 yield). Therefore it can be concluded successfully used prediction
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