Therefore, it is very necessary to research methods and establish a framework of desertification vegetation monitoring and evaluation information system at the county level.

因此，以县为单元，研究建立荒漠化植被监测的框架和信息处理和评价方法很有必要。

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The advantage of MODIS vegetation monitoring was analyzed. The methods for establishing time series of vegetation indicator by using MODIS data in Shaanxi Province were discussed.

分析了MODIS在植被生长变化监测中的优势，讨论了省级MODIS植被指数序列的建立方法。

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Now scientists have tested a new method for monitoring the health of vegetation by measuring emissions that the human eye cannot detect.

如今，科学家试验了一种新的方法，通过测量人类肉眼观测不到的植被释放物质，监测其健康状况。

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