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3）出了篇寂静上没看到的no-tilling（第一篇阅读。。）
P1:犁地导致(water and wind)，反正各种不好，水土流失什么的
P2:no-tilling各种好，把a（抱歉我忘记了这个长单词，第三段有提示a可以作为动物饲料）这种东西放在地里，可以防止土壤风化，增加营养
P3:为什么notilling这么好，农民不用呢？因为a可以用来做饲料呀！把a放在地里不是浪费了吗！农民缺乏知识，而且很穷买不起机器。。。
问题全都是关于no-tilling的
是原文吗？
https://forum.chasedream.com/thread-796108-1-1.html
P1 说耕种农业（till farming)这样那样的，又烧树叶又怎么的来维持Soil的温度之类（大概就是保养土地），对Poor 国家的人来说怎么怎么的（失忆了！）
P2 介绍了un-tilling farming( or no-till farming),说这种农业各种好啊！最后一句话说比起耕种农业需要大量的人力物力，no-till farming reduce cost!( 有点记不清了）
P3 说但是在发展中国家，要人们接受非耕种农业很困难。
No-Till: How Farmers Are Saving the Soil by Parking Their Plows
The age-old practice of turning the soil before planting a new crop is a leading cause of farmland degradation. Many farmers are thus looking to make plowing a thing of the past
By David R. Huggins and John P. Reganold
John Aeschliman turns over a shovelful of topsoil on his 4,000-acre farm in the Palouse region of eastern Washington State. The black earth crumbles easily, revealing a porous structure and an abundance of organic matter that facilitate root growth. Loads of earthworms are visible, too—another healthy sign.
Thirty-four years ago only a few earthworms, if any, could be found in a spadeful of his soil. Back then, Aeschliman would plow the fields before each planting, burying the residues from the previous crop and readying the ground for the next one. The hilly Palouse region had been farmed that way for decades. But the tillage was taking a toll on the Palouse, and its famously fertile soil was eroding at an alarming rate. Convinced that there had to be a better way to work the land, Aeschliman decided to experiment in 1974 with an emerging method known as no-till farming.
Most farmers worldwide plow their land in preparation for sowing crops. The practice of turning the soil before planting buries crop residues, animal manure and troublesome weeds and also aerates and warms the soil. But clearing and disturbing the soil in this way can also leave it vulnerable to erosion by wind and water. Tillage is a root cause of agricultural land degradation—one of the most serious environmental problems worldwide—which poses a threat to food production and rural livelihoods, particularly in poor and densely populated areas of the developing world [see “Pay Dirt,” by David R. Montgomery, on page 76]. By the late 1970s in the Palouse, soil erosion had removed 100 percent of the topsoil from 10 percent of the cropland, along with another 25 to 75 percent of the topsoil from another 60 percent of that land. Furthermore, tillage can promote the run-off of sediment, fertilizers and pesticides into rivers, lakes and oceans. No-till farming, in contrast, seeks to minimize soil disruption. Practitioners leave crop residue on the fi elds after harvest, where it acts as a mulch to protect the soil from erosion and fosters soil productivity. To sow the seeds, farmers use specially designed seeders that penetrate through the residue to the undisturbed soil below, where the seeds can germinate and surface as the new crop.
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发表于 2018-5-15 11:48:29
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