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Updated: May 17, 2025
The Distribution of the Nitrifying Organism in the Soil. Three series of experiments have been made on the distribution of the nitrifying organism in the clay soil and subsoil at Rothamsted. Advantage was taken of the fact that deep pits had been dug in one of the experimental fields for the purpose of obtaining samples of the soil and subsoil.
The injury is all the greater the nearer the tobacco is to its ripening period; the leaves hanging down to the ground then decay, and must be removed. If the subsoil is not deep enough, a carefully tended plant will turn yellow, and nearly wither away. In wet seasons this does not occur so generally, as the roots in insufficient depth are enabled to find enough moisture.
Scales as constructing engineer, and he will see that the plans and specifications of the entire contract are carried out to the letter." Platt, who had said nothing, walked away with Bobby. "You were speaking about following the plans exactly, Mr. Burnit," he said when they were alone upon the street. "I find on an examination of the subsoil that there will be a few minor changes required.
The great proof of the general poverty of Ceylon is shown in the failure of every agricultural experiment in which a rich soil is required. Cinnamon thrives; but why? It delights in a soil of quartz sand, in which nothing else would grow. Cocoa-nut trees flourish for the same reason; sea air, a sandy soil and a dry subsoil are all that the cocoa-nut requires.
It is best that this work should be done in autumn; and, if the land is level, that the freshly raised subsoil should be left exposed in its rough and lumpy condition without harrowing to the frosts of winter. If washing is to be apprehended, then sow the ground thickly with rye, harrowing in the seed only roughly.
Therefore, you are likely to do better with trees than with grain without summer-fallowing, although even for trees it is a decided advantage to have more moisture stored in the subsoil and the surface soil pulverized by more tillage. Defects in Soil Moisture.
In a champaign region insufficiently provided with natural channels for the discharge of the waters, and with a subsoil which, though penetrable by the roots of trees, is otherwise impervious to water, it is of cardinal importance; but though trees everywhere tend to carry off the moisture of the superficial strata by this mode of conduction, yet the precise condition of soil which I have described is not of sufficiently frequent occurrence to have drawn much attention to this office of the wood.
"I have sometimes wondered," Polwarth yet again resumed, "whether the troubles without end that some people seem born to I do not mean those they bring upon themselves may not be as subsoil plows, tearing deep into the family mold, that the seeds of the lost virtues of their race may in them be once more brought within reach of sun and air and dew.
That may be true, but mine has done well enough thus far, and, what is more to the point, I had no land with a northeast slope. The surface soil was thin and somewhat impoverished, but the subsoil was a friable clay in which almost anything would grow if it was properly worked and fed. It was my desire to make this square block of forty acres into a first-class apple orchard for profit.
A handsome, fast-growing tree, with large pinnate leaves that are often fully three feet long, and terminal erect clusters of not very showy greenish-white flowers that exhale a rather disagreeable odour. It is one of the most distinct and imposing of pinnate-leaved trees, and forms a neat specimen for the lawn or park. Light loam or a gravelly subsoil suits it well.
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