Over the last five decades, improved farming techniques and technologies have helped to significantly increase crop yields along with a 12% expansion of farmed land use.

在过去50年里，改良的农业科技技术显著提高了农作物的产量，耕种面积扩大了12%。

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The survey will substantially improve knowledge on land use change including deforestation, reforestation and natural expansion of forests.

调查将显著改善有关土地利用变化，包括森林砍伐、重新造林和森林自然扩展等方面的知识。

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The process and characteristics of urban expansion are analyzed using fractal dimension and compactness based spatial morphologic measurement coupled with land use change survey.

选用分维数和紧凑度作为城市形态指数，与城市土地利用变化相结合研究城市扩展的过程和特征。

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