. Elements of Philippine agriculture. Agriculture. CHAPTER III THE SOIL Any part of the surface of the earth in which ordinary j)lants may grow, or \\'hich can be made fit for crops, is called soil. The larger part of the earth's sur- face is water; ordinary plants cannot. "â row in the sea, which of course is not soil. Some of the earth's surface is solid or broken rock; this part, like- wise, is not a fit place for ordinary plants. Rocks are under all soils, every- where ; but soils vary greatly in depth. Soil in level places is usually deeper than on mountains, because the soil Fiu. i8
. Elements of Philippine agriculture. Agriculture. CHAPTER III THE SOIL Any part of the surface of the earth in which ordinary j)lants may grow, or \\'hich can be made fit for crops, is called soil. The larger part of the earth's sur- face is water; ordinary plants cannot. "â row in the sea, which of course is not soil. Some of the earth's surface is solid or broken rock; this part, like- wise, is not a fit place for ordinary plants. Rocks are under all soils, every- where ; but soils vary greatly in depth. Soil in level places is usually deeper than on mountains, because the soil Fiu. i8. Diagram show- washcs froui tlic mountaius to the ing the positions of â â , soil, subsoil, and rock vaUCyS. THE ORIGIN OF SOIL Weathering. In all towns in the Philippines there are old stone buildings or old stone walls. On these, and in the cracks between the stones, plants are grow- ing ; so there must be soil here. But on a new wall or a new building we can find no plants and no soil. i6. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Copeland, Edwin Bingham, 1873- [from old catalog]. Yonkers-on-Hudson, N. Y. , and Manila, World book company
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectagriculture, bookyear
