BEIJING, Dec. 5 (Xinhua) -- China's third national soil survey has made significant progress upon the completion of field sampling tasks, the Ministry of Agriculture and Rural Affairs said Thursday. As of the end of November, 88 percent of laboratory testing for the collected samples has been...
aagriculture 7 Universal Soil Loss Equation[translate] athe day went by without a clou in the sky. 正在翻译,请等待...[translate] a即使我再次失败,我会再试一次。 Even if I am defeated once more, I can again try one time.[translate] ...
Widespread soil acidification due to atmospheric acid deposition and agricultural fertilization may greatly accelerate soil carbonate dissolution and CO2 release.However,to date,few studies have addressed these processes.Here,we use meta-analysis and nationwide-survey datasets to investigate changes in soil ...
The title Science is a registered trademark of AAAS. REPORTS Significant Acidification in Major whether they also cause significant soil acidifi- cation at a national scale. A national soil survey was conducted during Chinese Croplands the early 1980s, and pH was determined in all topsoils that ...
(CO 2 ) in the atmosphere, raising concerns about marine biodiversity and ecosystemfunction (4–6). Anthropogenic acidification of soils has received less attention. Soils are strongly buffered by ion exchange reactions, by the weathering of soil min- erals, and (in the acidic range) by ...
Anikó Kovács-Hostyánszki and Ádám Kőrösi and Kirill Márk Orci and Péter Batáry and András Báldi - 《Agriculture Ecosystems & Environment》 被引量: 47发表: 2011年 Effects of wheat volunteers and blackgrass in set-aside following a winter wheat crop on soil infectivity and soil ...
Survey for root-lesion and stunt nematodes in the northern Australian grain region The presence of root-lesion nematodes (Pratylenchus thornei and P. neglectus) and stunt nematode (Merlinius brevidens) in some parts of the northern grain region has been knownsince the 1960's and yield loss in ...
The outlook for these is promising.There is a need for a better definition or classification of terrain conditions to guide designers in the development of such machines and potential uses in their choice. Increased productivity is a critical issue and the exigencies of the machine will tend to...
High-elevation mountain regions, central to global freshwater supply, are experiencing more rapid warming than low-elevation locations. High-elevation streams are therefore potentially critical indicators for earth system and water chemistry response to
Producers in the Coastal Plain of the southeastern United States manage soil compaction in conservation tillage systems by in-row subsoiling prior to plant... JS Bergtold,RL Raper,EB Schwab - 《Applied Engineering in Agriculture》 被引量: 41发表: 2009年 Bridging the Clinician/Researcher Gap wit...