搜索结果: 1-5 共查到“农学总论 rain”相关记录5条 . 查询时间(0.015 秒)
Expansion of mechanised rain-fed agriculture and land-use/land-cover change in Southern Gadarif, Sudan
Mechanised agriculture change detection vegetation clearance
2011/1/11
This study was an effort to produce synthetic knowledge on the rapid land-use/land-cover (LULC) changes and on the integrating rates of change with fundamental patterns in southern Gadarif region, Sud...
Report of “Acid Rain 2005”;Frontier of Research on Acid Rain and Its future Direction in Japan
Acid Rain Japan Report
2009/8/27
Report of “Acid Rain 2005”; Frontier of Research on Acid Rain and Its future Direction in Japan。
Efficient soil solarization for weed control in the rain-fed upland rice ecosystem
solarization LDPE film rice weed control herbicide
2008/12/2
Weed competition causes significant damage (up to 90%) to crop yields. Weed control through chemical means in the form of herbicide is commonly used to kill weeds or inhibit their growth throughout t...
CHARACTERISTICS OF ACID RAIN IN JINYUN MOUNTAIN, CHONGQING, CHINA
pH major ions air pollution acidifying rain
2010/3/23
The pH and chemical composition of 126 precipitation samples, which were collected from
April 1998 to November 1999 in Jinyun Mountain, Chongqing, China, were analyzed. The results
showed: the avera...
“Rain Follows the Plow” and Dryfarming Doctrine: The Climate Information Problem and Homestead Failure in the Upper Great Plains, 1890 -1925
Rain Follows the Plow Dryfarming Doctrine The Climate Information Problem Homestead Failure Upper Great Plains
2014/6/25
In the late 19th and early 20th centuries, the North American agricultural frontier moved into semi- arid regions of the Great Plains where farming was vulnerable to drought. Farmers who migrated to t...
