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Contour HedgerowsOn steep land, land subject to slip or excessive erosion, or land in a climate where heavy and severe storm rain events are sporatic and infrequent Swales may cause problems of erosion and are best avoided. Similarly in very hard rocky areas, sometimes swales are simply not possible without extreme effort or maybe heavy machinery. In these situations, Contour Hedgerows can perform the essential task of helping more rainfall to pemnetrate the soil, but avoid the possible risks of swales. Contour Hedgerows will generally be slower to establish and be effective than the vegetation possible along a swale system, but sometimes the risk of swales is not warranted.
Along this line, loosen the soil with a pick, for a width of 0.5m. If available, place a row of rocks along this line - three rocks high is great - but a lot of work!
Often some care will be necessary in the early years. This may mean irrigation. It certainly will involve excluding grazing animals for many years. If mulch material is available, the lines could be mulched. Carlos Caballero, (Tlaxcala, Mexico) has reforested a whole mountain (a small one)
simply by roughening the surface of the soil and then laying down a layer of composted
goat droppings (from his stables) - all of this on contour lines. The compost holding
better moisture, so herbs start
This form of working with the slope and shape of the landscape has been used in intensively used areas like Asia for thousands of years. |