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http://www.cheapestoakleysunglasses.org/ In agriculture,cheap oakley holbrook sunglasses, the ancient Chinese agronomy sheer number of books in the world. According to "Han records," Shen Nong "," Noe "before the Western Han Dynasty, there is now lost nine kinds of books on agriculture. In the earlier literature's "Book of Songs", has also been more than a dozen reviews of poetry which was devoted to farming. Paper, "agriculture" in the 3rd century BC "Lu", "any ground", "Discrimination of soil" and "trial" four to Begin due to agricultural production and production in line with local conditions.

At the moment, iron tools began to be nationwide popularity, the new sickle rake hoe plow. 6th century AD, the Northern Wei Jia Sixie writing oakley sunglasses discount the national earliest extant agricultural Encyclopedia "Qi Min Yao Shu", the book of 10 92, in agriculture, forestry, animal husbandry and fishery, the system summarizes the oakley discount sunglasses country northern agricultural production and agricultural science and technology, marking the oakley discount sunglasses country's practical agricultural science system mature. Yuan Dynasty Li-nung Division published the "agricultural book series to" Dynasty Wang Zhen, a combination of upland farming in the Yellow River Basin and the southern paddy field farming two key aspects of the production of practical experience in the agricultural book ".

From any land "to" Pan-winning book the to "NongzhengQuanshu, agricultural scientists have production experience and inventions into the crystallization of science and technology. oakley discount sunglasses the ancient agricultural science and technology developed, its geography and climate, social and political conditions have a close relationship. oakley discount sunglasses country a vast area of ​​the Yellow River and Yangtze River, the two fertile land, mild and humid climate, with the inherent advantages of the development of agriculture. Down the well-field system established by the focus on ritual Zhou Dynasty began to form in the Spring and Autumn Period, the culture of the Chinese nation inhabited land to defend their territory.