Sod Mulch

The ordinary sod culture which is practiced in so many orchards should not be confused with the sod mulch system. The one is a system of neglect, the other of intention. In the sod mulch system the grass sod is stimulated and encouraged



and when the grass dies or is cut, it is left on the ground to decay, forming a soil mulch meanwhile. The removal of grass from the orchard as hay is poor practice and should be discouraged. The grass mulch may well be supplemented by the addition of other grass, straw, leaves, coarse manure, or other similar materials. Sometimes this mulch is put on to the depth of six inches or even a foot around the tree. Thus practiced it is very effective in conserving moisture and in adding the humus which is so necessary to the soil. Sod and tillage have somewhat different effects on the tree and on the fruit. Let us see what these effects are. It is common knowledge that fruit is more highly colored when grown in sod than when grown under a tillage system. This is probably largely due to the fact that tillage keeps the fruit growing so late that it does not mature so well or so early. Fruit is usually two or three weeks later in tilled than in sod orchards. It has been shown that fruit grown under tillage keeps from two to four weeks longer than that grown in sod. It is claimed also--but this is a disputed point--that tilled fruit has a better quality and flavor. Certain it is that fruit grown in sod is drier and less crisp and juicy. The effect of tillage on the trees is more marked and better known. Tilled trees have a darker, richer green foliage, indicating a better and more vigorous health. The leaves are also larger and more numerous. They come out three or four days earlier in the spring and stay on the trees two weeks later in the fall than the leaves on trees kept in sod. Tilled trees make nearly twice the growth in a season that those in sod do, in fact there is danger of their making wood growth at the expense of fruit buds. Tillage also gives a deeper, better distributed root system. Despite the advantages and the disadvantages of each system, there are times, places, and circumstances under which one is more advisable than the other. On lands rich in humus and in plant food and level so as to be easily tillable, cultivation is without doubt the best system. But it should be practiced in connection with cover crops, and the orchard should be given occasional periods of rest in sod--say one year in from three to five. The sod mulch system of orchard culture is probably better adapted to rather wet good grass land and where mulching material is cheap and readily available. It is undoubtedly at its best on lands too steep or rough to till, or otherwise unsuitable to cultivation. Tillage is the more intensive method and where labor is scarce and high sod culture might be more advisable for this reason, other conditions being not too unfavorable. In order to illustrate a method of management under the tillage system we may suggest the following as a good one for level to gently rolling land: 1912. Early plowing in spring, cultivation to July first to fifteenth. Then sow red clover as a cover crop. 1913. Repeat previous year's treatment, varying the time of sowing cover crop according to conditions. 1914. Let the clover grow, mowing and leaving on the ground as a mulch, June fifteenth to twentieth, and again in August. 1915. Plow early in spring, cultivate to midsummer, and then sow rye or buckwheat as a cover crop July fifteenth to August fifteenth. 1916. Repeat 1915 treatment and if trees are not growing too fast, sow clover or hairy vetch as a cover crop. 1917. Same as 1912, etc. PASTURING THE ORCHARD.--The sod mulch system explains itself and does not need illustration. Sod orchards are often managed as pasture for animals, however, and this practice should be discussed. An orchard is considered as pastured when a considerable number of animals are turned into it for a greater or less portion of the year. Results in orchards where pasturage has been thoroughly tried out show that it is never advisable to pasture an orchard with horses or cattle, but that fairly good results may be expected where sheep or hogs are used. The evidence of yield of fruit and appearance of trees both indicate, that pasturing an orchard with horses or cattle is about the worst possible practice. These animals rub against the trees, break the branches, browse the limbs and leaves, and destroy the fruit as high as they can reach. All experience is against this practice which cannot be too strongly deprecated. Pasturing an orchard with sheep, although a somewhat doubtful practice, often gives good results. Sheep crop the grass close to the ground and to some extent prevent the extensive evaporation which usually takes place from the leaves of grass. Their well distributed manure is worth considerable. They also browse the branches to some extent and should not be allowed to run in the orchard late in the season as they will destroy considerable fruit. Pasturing an orchard with swine gives better results than any other pasture treatment of the orchard. Hogs do considerable rooting which prevents the formation of a stiff sod and itself may often amount almost to cultivation in well stocked orchards. A good deal of manure is added to the soil, especially when the hogs are fed outside the orchard. Hogs also destroy many insects by eating the wormy fruit. Pasturage of orchards has its advantages. It gives a double utilization of the land. It is a cheap method of management. When the animals are fed outside the orchard, as should always be the case, it adds considerable plant food to the soil. When plenty of outside food can be given and when the orchard is not overstocked--the animals should never be hungry--hogs and sheep may be used to advantage in pasturing orchards. In very rough fields incapable of tillage, this is undoubtedly the very best system of orchard management. Pasturage has the disadvantage of exposing young trees to injury from the animals, but this may be at least partly avoided by protecting them with stakes or a heavy wire meshed screen. Hogs especially soil the fruit and make the land rough and difficult to drive over. Under the proper conditions pasturage may be practiced to advantage, especially on small areas and on the general farm where it is more advantageous than it would be commercially.

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