. Better fruit. Fruit-culture. I'; :!. SLiiiiniary of results obtained in Block 3 2 725. Hight! |'ToT-Sc««%StA»ni<iywf$c 343 \ I ; •4 les 166 ! UNSPRAYED FiGURn 1. .Summary of results obtained in Block 4 with two leads of hose and from the ground. Considering that the rods are twelve feet long (many growers use ten-foot rods) the normal position of the nozzles while in use is at a height of about fourteen feet (see Figure 5). The rodman, in working around the tree, raises the nozzle at intervals to a height of seventeen to eighteen feet (see Figure 6). A
. Better fruit. Fruit-culture. I'; :!. SLiiiiniary of results obtained in Block 3 2 725. Hight! |'ToT-Sc««%StA»ni<iywf$c 343 \ I ; •4 les 166 ! UNSPRAYED FiGURn 1. .Summary of results obtained in Block 4 with two leads of hose and from the ground. Considering that the rods are twelve feet long (many growers use ten-foot rods) the normal position of the nozzles while in use is at a height of about fourteen feet (see Figure 5). The rodman, in working around the tree, raises the nozzle at intervals to a height of seventeen to eighteen feet (see Figure 6). As a long day wears on, the holding of a heavy rod at arm's length becomes very tiresome; for this reason the operator becomes uncon- sciously careless and the tops are slighted. By referring to the heights of the fifteen-year-old trees it will be seen that on the average eleven feet of tree surface occurs between the end of the spray rod, when raised to its high- est i)()int, and the top foliage. Leaves and fruit in this area, then, are depend- ent entirely upon the pressure exerted by the outfit and the air, to force and carry the li(|iii(l to its proper place. Under absolutely quiet atmospheric conditions it is possible to cover fairly well the under surfaces of the higher foliage and the fruit of these large trees, but a good many top surfaces are missed. With the slightest wind blow- ing the benefits derived from the air as a carrier are largely reduced, and are completely destroyed by the wind that normally occurs at Hood River during a greater part of the spring. In many instances the writer has ob- served orchardists spraying in a wind (spraying often has to be done under such conditions) that prevented the reaching of the trees at a greater height than five feet above the end of the rod. The average wind during the spraying season prevents the reaching of the trees at a greater height than six or seven feet above the end of the nozzles, and not very thoroughly at a
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