Excerpt from Text-Book of Land Drainage
The low yields of farm crops in this country are frequently used as a basis for speculation as tothe future limit of food supply. The causes for these low yields are variously estimated. Bad management, over-cropping, loss of soil fertility, washing away of soils, changing climatic conditions, and even over drainage are among the more prominent of the causes named. Bad management is a very comprehensive term. Loss of soil fertility is a much used expres sion, but indifferently understood. Sometimes it is properly applied, but in many cases it probably does not apply except in so far as it may be synonymous with malnutrition of the crop.
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