Miles and Dave, thank you for the input.
Miles, i am sorry for the lapse, yes, the pointed blueish lines are the parallel lines in the valley under the keyline.
I am going to plant an orchard on keyline pattern, meaning that each line of trees will be equidistant between them and those lines will not be on contour. I am still considering using a ripper to plow or doing a ditch and berm system.
After a year and half of experience on the farm ( in the past was heavily pastured) i can still see ridge areas without any kind of vegetation and the valley areas completely wet during the rainy season, so the infiltration is not balanced.
If you follow a contour line from a ridge to a valley it does not really go lower in elevation. If I dig a swale along the contour the water that fills that swale will fill it on a level untill it reaches a spillway that is designed to be lower than the rest of the swale. So if water runs down a valley and hits the "dam" of a swale it will fill the swale and move along the same elevation out to the ridge.
Agree.
But on a keyline pattern, the end of the ridge is on a lower altitude than the apex of the same line on the valley so that the rain infiltrates exactly where it falls, right?
So on one of the very few documents that explain the technik in practice, Abe Collins & Darren J. Doherty explain that
Cultivate parallel and upward from any selected contour line on the ridges. When there is no Keyline to work from (lower in the valleys, or on ridges) use contour guidelines to cultivate parallel to (upward from on ridges, downward from in valleys.)
and again
In practice, one would lay out the Keyline across the primary valley, then carry that contour line out onto and around both ridges, then cultivate upward from that in long plough passes. You would then plough downward from that line,restricting yourself to the valley shape. (The ridges would be ploughed parallel and upward from a lower contour guideline.
But when i follow those guidelines it just doesn't match, once the ridge parallel lines cross the valley above the keyline those parallel lines will go higher in altitude rather than lower, that is, the ridge end point is on a higher altitude than the apex on the valley. So i am wondering if what we should have is four different patterns:
1- On the valley under the keyline;
2- On the valley above the keyline;
3- On the right ridge;
4- On the left ridge.
Inputs?