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Keyline development first controls the usual water run off into valleys from the higher land, by tremendously increasing the absorption capacity of this area and diffusing the excess water, thus greatly retarding and delaying its time of concentration.
Keyline development first controls the usual water run off into valleys from the higher land, by tremendously increasing the absorption capacity of this area and diffusing the excess water, thus greatly retarding and delaying its time of concentration.
From the Keyline both up the slope and down the slope of the land, timber strips are left (or planted) on the contour at regular vertical intervals apart. The important guide for determining this vertical interval between timber strips is related to the height of the [[trees]]. If trees are 45 feet high the timber strips could be 40 feet apart vertically. This provides some overall wind protection for all the land and locates the timber strips closer together in the steep country and farther apart as the country flattens.
Even in very flat country of low scrub or mallee only 10 to 15 feet high this formula for clearing will provide greatly improved farm conditions.