三、秦汉时期内蒙古的农业技术随着移民垦殖的发展,中原的农业技术也在边疆地区得到了传播。西汉时期,边疆地区的早作农业已形成了较为配套的耕作技术,并开始发展灌溉农业。汉武帝元狩年间,在大司农郑当时修渭澶渠吋“朔方亦穿渠,作者数万人,各历二,三期,”(年)但因缺乏引黄灌溉经验,“功未就,费亦各巨万十数.[39]”第一次引黄灌溉虽然效果不佳,但并未因此放弃开渠懣田的努力.正如《史记·匈奴列传》所说“汉渡河自朔以西至令居(今甘肃永登县)往往开渠,置田官,吏卒五、六万人.” Third, agricultural technology in Qin and Han Dynasties in Inner Mongolia With the development of immigrants reclamation, Central Plains agricultural technology has also been spread in the border areas. During the Western Han Dynasty, early farming in the border areas had formed a more complete farming technique and started to develop irrigated agriculture. In the period of the Yuan Dynasty of Han Dynasty, when the great division Nongzheng was repairing the Wei River drainage channel, “Shuofang also ditched the canal with tens of thousands of people of each calendar year two and three periods.” (Year) However, due to the lack of irrigation experience in dredging the Yellow River, The fees for each of them are still ten thousand and ten thousand. “39 Although the Yellow River irrigation was ineffective for the first time, it did not give up its efforts to open up water to irrigation. As the” Historical Biography of Huns “said” Shuo west to order home (now Yongdeng County, Gansu) are often open ditch, set Tian officer, officials died five or six million people.