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土壤调查
释义
土壤调查
Encyclopedia
农学
土壤调查
释
soil survey
土壤调查
以确定土壤类型及其边界为主要目的和内容的专业活动。以土壤地理学理论为指导,通过对土壤剖面形态及其周围环境的观察、描述、记载和采样化验,对土壤的发生、发育、演变、分类、分布、肥力和质量进行分析、判断,并勾绘出所有土壤类型的边界。土壤调查的基础是土壤分类。对于土壤调查活动来说,土壤分类系统是必须具备的。广义的土壤调查还包括对各种土壤性状及其变化进行确定的专业活动。具有突出的野外实地研究土壤的特征,是土壤研究的一种基本方法。
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A Painting of One Man and One Horse Looking into the Distance
A Painting of Travelling by the Stream at Hillside
A Painting of Wuxia and River in Autumn
A Painting of Zhuyun Breaking Railing
a pair of blue-and-white porcelain vases with operatic portraits of Qing Dynasty
A Pair of Pearl Phoenix
A Pair of Unfortunate Lovers
A Panorama of Rivers and Mountains by Wang Ximeng
A Panorama of the Yangtze River by Wu Wei
A Panoramic Painting of Ten Thousand Valleys and Pines
apara-brahman
A. Parent
A. Parent (1666—1716)
apareon
apartheid
Apartheid Museum
apartment
apartment building
apartment/flats/mansion
apartment for the single
apartment of tower building
apartments for the elderly
apartness
A Passage to India
apastron
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