Show DEPTH FOR irrigation DITCH to make soil reta n mo sture it must be kept well mulched deep plowing necessary it if the soil la is dry and lard ar at d the vater ater will not go into it the irrigation ditches must be made below the pard layer of 0 soil it is necessary in many ot of the orchards to make the ditches with a plow make them deep with wide bottoms chere a the soil Is heavy X J or made up of fine particles in light sandy soil it Is not necessary nece to make W the ditches so deep the ordinary s hal 4 low narrow bottomed ditches are good goo d ta under such conditions writes R n tremble of W N ena tchee wash in the western farmer to nake the soil reta ir moisture it must be kept well mell mulched a dust mulch is very good but it must be kept well worked and the mulch J be three or four inches deep another great help in mahns maling the soil boll hold moisture Is to keep a good quantity of humus in the soil this can be done by plowing under cover crop or by applying manure or both the best method for our conditions since bince there will be always a shortage ct of manure Is to grow a cover crop and 0 add a small quantity ot of manure to the c ver crop and plow both under to gether V ile must provide for the con k sinuous additions of humus to the soil tor for in this district the humus is very soon consumed out of the soil for a boil soil to properly receive the mol ture frem an irrigation it must be in good physical ph steal condition it Is 4 ble to properly irrigate a soil which is in a poor physical condition many orchard d soils bolls are in a poor phys leal teal condit on purely because they have not been properly plowed or 51 what ix i voise v or se have not been plowed at all with orchards properly plowed at the right time irrigation is much more nore effle ent and it is easier done |