Whether you can grow deciduous fruits successfully without irrigation depends not only upon how well you conserve the moisture by cultivation, but also whether the total rainfall conveys water enough, even if as much as possible of it is conserved. Again, you might find that thorough cultivation will give you satisfactory young trees, but would not conserve moisture enough for the same trees when they come into bearing. This proposition should be studied locally. If you can find trees in the vicinity which do give satisfactory fruit under the rainfall, you would have a practical demonstration which would be more trustworthy than any forecast which could be prepared upon theoretical grounds. Condensation for Irrigation. If a circular funnel of waterproofed building paper, or some better cheap device, were fastened about the base of the tree in such a manner as to catch and concentrate most of the drippings from the leaves, and that water made to run down through a tube leading a suitable depth into the earth, it seems to me that the number of foggy nights that occur in many localities during the season might thus supply ample water for a tree's needs. The probability is that water would not be secured in sufficient quantities to serve any notable irrigation purposes, or if the fogs were so thick as to yield water enough, the sunshine would be too scant for the success of the plant. Put your idea to the test and see how much water you could get from a tree of definite leaf area, which could be readily estimated. Winter Irrigation. Last May I irrigated my prune trees for the first time, again during the first two weeks of last December. If no rain should come within the next two weeks, would you advise me to irrigate then? Should I plow before irrigating, or should irrigation be done before the buds swell? Unless your ground is deeply wet down by the rains which are now coming, irrigate it once, and do not plow before irrigating. The point is to get as much water into the ground and as much grass growth on top as you can before the spring plowing. Never mind about the swelling of the buds. The trees will not be affected injuriously by getting a good supply of winter water into the soil. There might be some danger with trees which bloom late in the spring, like citrus trees or olives, because by that time the ground has become warm and the roots very active. At the blooming time of deciduous trees less danger would threaten, because there is less difference between the temperature of the ground and the water which you were then applying from a running stream. If you irrigated in furrows and, therefore, did not collect the water in mass, its temperature would rise by contact with air, which would be another reason for not apprehending trouble from it. How Much Water for Oranges?