摘要:

The present paper describes the results of a ground experiment conducted on major crops of India during December 1980 to April 1981 and October 1981 to April 1982. The crops selected were wheat, chickpea and mustard. The experiment was jointly conducted between the Indian Space Research Organization (ISRO) and the Indian Agricultural Research Institute. Canopy spectral reflectance and physiological variables were measured over the complete crop cycle. The results of the 2 year experiment led to the following conclusions: (i) spectral parameters can be used for detecting water and nutrient stress in crops, (ii) spectral parameters are highly correlated to physiological variables and final production, (iii) correlation is further improved by including the effect of weather parameters, (iv) stress degree day is highly correlated to grain yield and (v) a yield model based on photosynthesis calculation worked well for the wheat experiment.

ISSN:0143-1161    

DOI:10.1080/01431168508948480

出版商:Taylor & Francis Group    

年代:1985

数据来源: Taylor

摘要:

A very densely populated large country such as India requires a very efficient and reliable system for the collection of resources information so that timely managerial decisions can be taken. Realizing this need and based on the experience over several years past, it has been decided that India should have its own remote-sensing satellite programme for this purpose. This experience has been gained over more than half a century, first through black-and-white panchromatic aerial surveys, then through the use of LANDSAT data and false-colour photographic and multispectral scanner aerial surveys and finally through conducting end-to-end result-oriented experiments proving the feasibility of using remote sensing in crucial information requirements of the country. A comprehensive utilization plan for a decade, in collaboration with the users in the country, has been formulated. The salient features of this utilization plan are presented.

ISSN:0143-1161    

DOI:10.1080/01431168508948481

出版商:Taylor & Francis Group    

年代:1985

数据来源: Taylor