Title :
Using the NDVI contribution ratio at different growth stages to estimate winter wheat yield
Author :
JING, Juan-juan ; WANG, Ji-hua ; WANG, Peng-xin ; PAN, Yu-chun ; LIU, Liang-yun ; WANG, Jin-di ; WANG, Hua ; HUANG, Wen-jiang
Author_Institution :
Nat. Eng. Res. Center for Inf. Technol. in Agric., Beijing, China
Abstract :
This paper mainly proposed using multi-temporal spectral data with given weight to estimate yield using contribution ratios of different stages to improve yield estimation, then use stepwise regression to build models for yield estimation. The contribution ratio is calculated by principal component analysis respectively. Result show that this methodology reflects the crop growth status, physiological characters at different stages, and improves the accuracy obviously.
Keywords :
agriculture; crops; data acquisition; vegetation mapping; NDVI contribution ratio; crop growth stages; multitemporal spectral data; normalized difference vegetation index; physiological characters; principal component analysis; stepwise regression; winter wheat yield; yield estimation; Agricultural engineering; Agriculture; Crops; Economic forecasting; Fertilizers; Reflectivity; Remote sensing; Variable speed drives; Vegetation; Yield estimation;
Conference_Titel :
Geoscience and Remote Sensing Symposium, 2003. IGARSS '03. Proceedings. 2003 IEEE International
Print_ISBN :
0-7803-7929-2
DOI :
10.1109/IGARSS.2003.1293781
