Gauteng Smallholder August 2015 | Page 19

From page 16 the stakes. Have an assistant hold one stake in a vertical position on one side of the field in which you wish to establish a contour line while you take the other end to the other side of the field. It doesn't matter what happens to the hose in between ~ it can curve and loop over itself ~ so long as its length is lower than both ends. Hold your stake vertical with the end touching the ground. Now have your assistant pour water into the hose. If your end is lower than the assistant's water will gush out as the hose fills. Walk uphill till the gushing stops. At this point both ends of the hose are on the same contour. Walking further uphill will result in the level of the water in your end dropping in the hose, and water beginning to gush out at the assistant's end. If you intend to cultivate the field all tractor work, eg ripping, ploughing, etc, should take place following a level line between these two points (and others similarly PLANNING your field, you will use the line between these two points to dig out a shallow trench, throwing Hosepipe ends attached to two droppers of even length. the dug out established up both soil into a heap on the lower sides of the field). side. Depending on the size If you wish to establish of the field and its slope, this permaculture-like water can be repeated two or three conservation measures in times following similar 17 www.sasmallholder.co.za contours. The dug-out soil banks should be smoothed off and sown with your preferred grass seed to stabilise the soil. Called swales, these shallow trenches will catch and store the rainwater run-off that would otherwise be lost. As a result, the channels will grow additional vegetation and can even be planted with shadegiving trees and shrubs which will benefit by the trapped rainwater.