Build a good crop growth and development model, not only can predict the crop in different environmental conditions, most need to re-estimate the model parameters and optimization.
构建良好的作物生长发育模型，不但可以预测作物在不同的环境条件下模型参数大多需要重新估计和优化。
One of the main task in agricultural monitoring using remote sensing is to estimate crop area through image classification.
0引言农情遥感监测的重要内容之一是利用遥感图像分类提取作物面积[1]。
According to an estimate, only 13% of our total crop hectareage receives pesticide cover, while
根据一项估计，巴基斯坦只有总耕种面积的13%喷撒了农药，而其余87%的农场完全没有植物保护。
It was introduced that the application of low altitude remote sensing in precision agriculture, such as digital of plot boundary, estimate of plot area, identify of the crop category, analyses of crop growth.
介绍了低空遥感技术在精准农业中的应用情况，如地块边界数字化、地块面积量算、作物种类识别、作物长势分析等。
Crop experts in Afghanistan estimate that horticulture the growing of fruits, vegetables and flowers is the only sector that offers competitive financial returns.
阿富汗的农作物专家预计园艺水果、蔬菜和鲜花的增长是唯一具有经济回报竞争力的部门。这些曾经占阿富汗出口量的40%。
In a field, a common procedure to estimate ET under nonideal conditions is the three - stage modeling procedure: reference ET crop coefficients soil moisture term.
在农田尺度，非理想的环境中，蒸发蒸腾量的估算遵循传统的三步骤法：参考作物蒸发蒸腾量作物系数土壤水分修正系数。
The new estimate also factors in marginal crop damage in parts of Andhra Pradesh and Punjab.
这次的估算也考虑到了如安德拉邦和旁遮普地区的庄稼损害。
Mr Liu, who runs a souvenir shop and restaurant in Jia Sian, selling products made of the area's famous taro crop, said the official estimate of about 380 people dead in Hsiao Lin was the most conservative number.
刘世贤表示，官方预计的小林村死亡人数约380人是最保守的数字。刘世贤在甲仙乡经营着一家纪念品商品和餐馆。
Reference crop evapotranspiration (ET0) was a key factor to estimate crop water requirement and determine farming irrigation.
参考作物蒸散量是估算作物需水量的关键因子，对指导农田灌溉具有重要的现实意义。
That is " Research in RS-Image Classification assisted by GIS to estimate the area of crop ". Based on studying theories such as " 3S ", Pattern Recognition and RS-Image processing, the way to estimate area is designed and realized.
本论文在研究3S、模式识别、遥感影像处理理论基础上，提出了在GIS辅助下的遥感影像分类提取作物面积的方法。
But this month, the Department of Agriculture added about five percent to its latest estimate for this year's corn crop.
这个月，美国农业部对其玉米年产量的最新估计增加了约5%。
So, activities of rhizosphere microbes could be an index used to estimate soil properties and crop growth and development. 2.
因此，根际生物活性可作为评价土壤物理性状和作物生长发育优劣的重要指标。
At present the technology of remote sensing is veryimportant in different parts of economy. People can utilize the technology of remote sensing tonavigate, update map, estimate the output of crop and the mounts of storage and change of grassand forest, mark the resource zones of gold and petrol and coal, supervise the natural andman-made disaster, estimate the loss and bring forward the countermeasure, supervise theappropriate exploration of resources and Etc.
目前，遥感技术已经在国民经济的各个部门发挥着重要的作用，如应用遥感技术进行导航定位，地图更新，估计农作物产量、草场和森林载蓄量及变化，勘探黄金、石油、煤炭等资源，监测自然和人为灾害，估计损失和提出对策，监督资源的合理开发等。
That is " Research in RS-Image Classification assisted by GIS to estimate the area of crop ". Based on studying theories such as " 3S ", Pattern Recognition and RS-Image processing, the way to estimate area is designed and realized.
本论文在研究3S、模式识别、遥感影像处理理论基础上，提出了在GIS辅助下的遥感影像分类提取作物面积的方法。