In Ohio, the land bordering on the river of the same name is hilly and broken; but most of these hills have a deep rich soil, and are capable of being cultivated to their very summits. The bottoms of the Ohio are of very unequal width; the bases of some of the hills approach close to the river, while others recede to the distance of two or three miles. There are usually three bottoms, rising one above the other like the glacis of a fortification; and they are heavily timbered with such trees as denote a very fertile soil. In such parts of these bottoms as have been cleared and settled, the soil is uniformly fertile in a high degree; producing in great abundance wheat, Indian corn, rye, oats, and barley, and apples and peaches of excellent quality. In the western counties, and in the north-western and northern portions of the state, there is a leveller surface, and a moister soil, interspersed with tracts of dry prairie, and forests of a sandy or gravelly soil. The north-western corner of the state contains a considerable district of level,rich land, too wet and swampy to admit of healthy settlements: the soil is a black, loose, friable loam, or a vegetable mould, watered by sluggish and dark-colored streams.
That part of the territory of Michigan, which forms the peninsula lying between the great lakes, is generally level. In its centre, however, is a ridge of table-land about three hundred feet above the lakes, running north and south, and dividing the waters emptying into Erie and Huron from those running to the westward. This peninsula is divided into about equal proportions of grass prairies and forests. Along the southern shore of Lake Michigan is a sandy and barren tract of country, bleak and desolate. But much of the soil of this country is excellent, and its productions are similar to those of the state of New York. The North-West territory has not yet been much explored. That portion of it situated between the Fox and Wisconsin rivers, and the western shore of Lake Michigan, has a rich, black, alluvial soil, and is well watered. The face of the country is unbroken by hills of any magnitude.
The most striking feature of the vast Missouri territory is its ocean of prairies. A belt of partially wooded country extends from two to four hundred miles west of the Mississippi and its waters. The immense extent of country west of the two great rivers is generally level, and is covered with grass plains, and sand deserts. On the banks of the streams there is usually a line of rich soil, but as we leave them it becomes barren and dry. Much of this country is as sterile as the deserts of Arabia, though in the most sandy parts there is a thin sward of grass and herbage. The Missouri, the Platte and the Yellow-stone run through a rich soil; but in its upper courses the Arkansas waters only a barren prairie.
GENERAL REMARKS ON SOIL.
The productiveness of soils is influenced by the nature of the sub-soil, or the earthy or stony strata on which they rest, and this should be attended to in all plans for their improvement. Thus sandy soil may owe its fertility to the power of the sub-soil to retain water; and an absorbent clay soil may occasionally be prevented from being barren by the influence of a substratum of sand and gravel. Those soils that are most productive of corn, contain always certain proportions of aluminous or calcareous earth in a finely divided state, and a certain quantity of vegetable or animal matter.
‘In cases,’ says Sir Humphrey Davy, ‘where a barren soil is examined with a view to its improvement, it ought, in all cases, if possible, to be compared with an extremely fertile soil in the same neighborhood, and in a similar situation; the difference given by their analyses would indicate the methods of cultivation, and thus the plan of improvement would be founded upon accurate scientific principles.
‘If the fertile soil contained a large quantity of sand, in proportion to the barren soil, the process of amelioration would depend simply upon a supply of this substance; and the method would be equally simple with regard to soils deficient in clay or calcareous matter. In the application of clay, sand, loam, marl, or chalk, to lands, there are no particular chemical principles to be observed; but, when quicklime is used, great care must be taken that it is not obtained from the magnesian limestone; for in this case, as has been shown by Mr. Pennant, it is extremely injurious to land. The magnesian limestone may be distinguished from the common limestone by its greater hardness, and by the length of time that it requires for its solution in acids; and it may be analyzed by the process for carbonate of lime and magnesia.
‘When the analytical composition indicates an excess of vegetable matter as the cause of sterility, it may be destroyed by much pulverization and exposure to air, by paring and burning, or the agency of lately made quicksilver; and the defect of animal and vegetable matter must be supplied by animal or vegetable manure. The general indications of fertility and barrenness, as found by chemical experiments, must necessarily differ in different climates, and under various circumstances. The power of soils toabsorb moisture, a principle essential to their productiveness, ought to be much greater in warm and dry countries, than in cold and moist ones; and the quantity of fine aluminous earth they contain should be larger.
‘From the great difference of the causes that influence the productiveness of lands, it is obvious, that, in the present state of the science, no certain system can be devised for their improvement, independent of experiment; but there are few cases in which the labor of analytical trials will not be amply repaid by the certainty with which they denote the best methods of melioration; and this will particularly happen when the defect of composition is found in the proportions of the primitive earths. In supplying animal or vegetable manure, a temporary food only is provided for plants, which is in all cases exhausted by means of a certain number of crops; but when a soil is rendered of the best possible constitution and texture with regard to its earthy parts, its fertility may be considered as permanently established. It becomes capable of attracting a very large portion of vegetable nourishment from the atmosphere, and of producing its crops with comparatively little labor and expense.’