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小麦是我国最主要的粮食作物之一。显然,世界粮食产量及其市场价格的波动对我国粮食生产和国计民生都有很大影响。因此,迫切需要能及早地对小麦生产进行预测。目前,国内有关部门大都是以抽样调查和层层估产的办法进行预测的,这种方法时效短、经验性强。1975—1978年美国开展了LACIE计划,利用陆地卫星和地面观测资料对世界小麦生产进行估
Wheat is one of the most important food crops in our country. Obviously, fluctuations in the world’s grain output and its market prices have a great impact on the grain production and the national economy and people’s livelihood in our country. Therefore, there is an urgent need to make early forecasts of wheat production. At present, most of the relevant departments in the country make predictions on the basis of sample surveys and layers of production estimation. This method is short-lived and highly experienced. From 1975 to 1978, the United States launched the LACIE project to assess the world’s wheat production using land-based satellite and ground-based observations