Word: layering
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...second layer of extra tenants poured into the Houses last year will be drained off in February, and the House population will return to the 50 percent-above-pre-war level established in 1946, Dean Watson announced yesterday...
...Soil. The prize virgin soils of temperate regions are the chernozems.* They develop in dryish regions like Iowa and the Ukraine, where the climate naturally favors the growth of tall grasses. The grasses deposit a great deal of organic material in the soil, forming a dark brown, almost black layer a foot or more deep. This (and the slight rainfall) keeps soluble nutrients from leaching away...
...cool, temperate region with enough rainfall to support dense forest, an entirely different type of soil develops: a podsol.† Tree roots do not bring enough lime to keep the soil from being acid, and their dead leaves form a layer of loose mold on the surface. Just below is a light-colored, often almost white layer of soil from which most of the soluble minerals have been leached by the heavy rainfall. Such a tree-formed soil is favorable for trees, but when man clears the forest and plants his grasslike wheat or corn, he gets poor crops...
Attracted by gravitation, they flash down to the center of the star, releasing enormous energy. The reaction may spread in a short time through most of the mass of the star. The energy released is enough to blow off the star's outer layer. All that remains, according to this theory, is a small, dense core of neutrons and a vast shell of flaming gas that burns itself out in a few months of splendor...
Plowless Folly. Nor does Dr. Kellogg think much of "plowless farming," a fad promoted by Edward Faulkner's Plowman's Folly. Sometimes, Kellogg says, it is a good idea to avoid plowing, so as to leave a layer of litter on the surface, but the plowless method works only in special cases. "Some farmers and gardeners," says he, "in the eastern part of the U.S.-especially city gardeners-took the doctrine literally and planted corn in fields of Bermuda grass-corn that got a few inches high, turned yellow, and finally perished...