ANALYSIS OF SOILS. 21 standard; for differently constituted soil will produce different crops advantageously: one farm produces fine wheat, another barley; others again the finest oats and beans in the parish. To compound a soil of exact chemical parts, so as to afford permanent fertility, is a mere theory. Nature and circumstances may produce a piece of land, that will yield unremitting crops of grass, and we call it a permanently good soil; but art cannot effect this upon a great scale. A small field in this parish always produces good crops; not in consequence of any treatment it receives, but by its natural composition; consisting principally of finely pulverized clay, stained with red oxide of iron, a considerable portion of sand, and vegetable earth: but though I know the probable cause of this field bearing such good wheat, I cannot bring the surrounding and inferior ones into a like constitution, the expense far exceeding any hope of remuneration. Rudolph Glauber obtained gold from common sand, but it was an expensive article! Temporary food for a crop may be found in animal, vegetable, or earthy manures, but these are exhaustible; and when aliment ceases, the crop proportionably diminishes. In one respect, chemical investigation may importantly aid the agriculturist, by pointing out the proportion of magnesian earth in certain limes used for manure, and thus indicate its beneficial or injurious ef fects on vegetation. I should not like lime containing 20 per cent. of this earth; but when it contains a much smaller proportion, I should not think it very deleterious. This earth acts as a caustic to vegetation, and, neither being soluble in water, nor possessing the other virtues of lime, diminishes the number of bushels used according to its existence, and thus deprives the crop of that portion of benefit: but after all, as Kirwan says, the secret processes of vegetation take place in the dark, exposed to the various and indeterminable influences of the atmosphere; and hence the difficulty of determining on what peculiar circumstance success or failure depends, for the diversified experience of years alone can afford a rational foundation for solid and specific conclusions. The real goodness of a soil consists principally, perhaps, in the power it possesses of maintaining a certain degree of moisture; for without this, the plant could have no power of deriving nutriment from any aliment: it might be planted on a dung-hill; but if this had no moisture in it, no nutriment would be yielded; but as long as the soil preserves a moisture, either by its own constituent parts, or by means of a retentive substratum, vegetation goes on. Continue the moisture, and increase the aliment, and the plant will flourish in proportion; but let the moisture be denied by soil, substratum, or manure, and vegetation ceases; for, though certain plants will long subsist by moisture obtained from the air, yet, generally speaking, without a supply by the root, they will languish and fade. Our dairy processes, I believe, present nothing deserving of particular notice. From our milk, after being skimmed for butter, we make a thin, poor cheese, rendered at a low price, but for which there is a constant demand. Some of our cold lands, too, yield a kind greatly esteemed for toasting; and we likewise manufacture a thicker and better sort, though we do not contend in the market with the productions of north Wilts, or the deeper pastures of Cheshire or Huntingdon. The agriculture of a small district like ours affords no great scope to expatiate upon; great deviations from general practice we do not aim at; experimental husbandry is beyond our means, perhaps our faculties. Local habits, though often the subject of censure, are frequently such as the "genius of the soil" and situation render necessary, and the experience of years has proved most advantageous. Our grass in the pastures of the clay lands, in the mowing season, which, from late feeding in the spring and coldness in the soil, is always late,* presents a * In 1826, the herbage on some of our clay lands designed for mowing was, by reason of its tardy growth, and the dryness of the season, in such small quantities, that the owners let it grow untouched until after the corn harvest, in order to obtain some bottom grass, and, in consequence, our haymaking, as it was called, was not over until the last week in September. curious appearance; and I should apprehend, that a truss of our hay from these districts, brought into the London market, or exhibited as a new article of provender at a Smithfield cattle-show, would occasion conversation and comment. The crop consists almost entirely of the common field scabious (scabiosa succisa), loggerheads (centauria nigra), and the great ox-eye daisy (chrysanthemum lucanthemum.). There is a scattering of bent (agrostis vulgaris), and here and there a specimen of the better grasses; but the predominant portion, the staple of the crop, is scabious-it is emphatically a promiscuous herbage; yet on this rubbish do the cattle thrive, and from their milk is produced a cheese greatly esteemed for toasting-melting, fat, and good flavored, and, perhaps, inferior to none used for this purpose. The best grasses, indeed, with the exception of the dogstail (cynosurus cristatus), do not delight in our soil: the meadow poa (p. pratensis), and the rough stalked poa (p. trivialis), when found, are dwarfish; and having once occasion for a few specimens of the foxtail (alopecurus pratensis), I found it a scarce and a local plant: but I am convinced, from much observation, that certain species of plants, and grasses in particular, are indigenous to some soils, and that they will vegetate and ultimately predominate over others that may be introduced. In my own very small practice, a field of exceedingly indifferent herbage was broken up, underwent many plowings, was exposed to the roastings of successive suns, and alternations of the year under various crops; amongst others that of potatoes; the requisite hackings, hoeings, and diggings of which alone were sufficient to eradicate any original fibrous, rooted herbage. This field was laid down with clean ray grass (lolium perenne), white trefoil, and hop clover, and did tolerably well for one year and then the original soft-grass, (holcus lanatus) appeared, overpowered the crop, and repossessed the field; and yet the seed of this holcus could not have lain inert in the soil all this time, as it is a grass that rarely or never perfects its seed, but propagates by its root. The only grass that is purposely sown-trefoils are not grasses-is, I believe, the ray, or rye, no WILD PLANTS. 24 others being obtainable from the seedsman: this we consider as perennial; yet, let us lay down two pieces of land with seeds, from the same sack, the one a low, moist, deep soil, the other a dry upland, and in three or four years we shall find the natural herbage of the country spring up, dispute and acquire in part possession of the soil, in despite of the ray-grass sown in the deep soil, the predominant crop will probably consist of poæ, cockfoot, meadow-fescue, holcus, phleum, foxtail, &c.; in the dry soil it will be dogstail, quaking grass, agrostis, &c., not one species of which was ever sown by us. It appears that the herbage of our poor thin clay-lands is the natural produce of the soil, for every fixed soil will produce something, and would without care always exclude better herbage. Attention and manures, a kind of armed force, would certainly support other vegetation, alien introductions, for a time, but the profit would not always be adequate. In a piece of land of this nature I have suppressed the natural produce, by altering the soil with draining, sheep-feeding, stocking up, and composting: and scabious, carnation grass, mat grass, and their companions, no longer thrive; but if I should remit this treatment, they would again predominate, and constitute the crop. Most counties seem to have some individual or species of wild plants predominating in their soil, which may be scarce, or only locally found in another; this is chiefly manifested in the corn-lands-for aquatic or alpine districts, and some other peculiarities, must form exceptions. This may be in some measure occasioned by treatment or manure, but commonly must be attributed to the chemical composition of the soil, as most plants have organs particularly adapted for imbibing certain substances from the earth, which may be rejected or not sought after by the fibrous or penetrating roots of another. Festuca sylvatica abounds in every soil without an apparent predilection for any one: F. uniglumis, only where it can imbibe marine salt: F. pinnata, is found vegetating upon calcareous soils alone, and I have known it appear immediately as the limestone inclined to the surface, as if all other soils were de ficient in the requisite nutriment. Many of the maidenhairs and ferns, pellitory, cotyledon, &c. are attached in the crevices of old walls, seeking as it were for the calcareous nitrate found there, this saltpetre appearing essential to their vigor and health. The predominating plants in some corn-fields is the red-poppy, cherlock (sinapis arvensis), mustard (sin. nigra.), wild oat, cornflower (cyanus); but in some adjoining parish we shall only sparingly find them. With us in our cold claylands we find the slender foxtail grass (alopecurus agr.) abounding like a cultivated plant: when growing in clover, or the ray-grass, the whole are cut together, and though not a desirable addition, is not essentially injurious; but vegetating in the corn, it is a very pernicious weed, drawing nutriment from the crop, and overpowering it by its more early growth, at times so impoverishing the barley or the oats, as to render them comparatively of little value. The upright brome grass (bromus erectus) is a pest in our grass lands, giving the semblance of a crop in a most unproductive soil; hard and wiry, it possesses no virtue as food, and is useless as a grass this bromus inclines to the limestone, the lias, or clay-stone, as if alumine was required, to effect some essential purpose in its nature; but this is a plant not found universally.. We have in use generally here a very prudential method of saving our crops in bad and catching seasons, by securing the hay in windcocks, and wheat in pooks. As soon as a portion of our grass becomes sufficiently dry, we do not wait for the whole crop being in the same state, but, collecting together about a good wagon load of it, we make a large cock in the field, and as soon as a like quantity is ready we stack that likewise, until the whole field is successively finished, and on the first fine day unite the whole in a mow. Some farmers, in very precarious seasons, only cut enough to make one of these cocks, and having secured this, cut again for another. Should we be necessitated, from the state of the weather, to let these parcels remain long on the ground, or be a little dilatory, which I believe we sometimes are, before they are carried, or, C |