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Show of Rayplex at five pounds per 100 gallons. The Rayplex iron produced greener leaves earlier than did the Fe 138. We noticed differences between the treated and untreated trees within two or three days after the lntial spray. Trees receiving either three sprays of five or ten pounds per 100 gallons of Rayplex iron greened up the trees well Larger amounts of this material were used since the price per pound is about five times cheaper and we wished to compare the effects of treatments of similar cost However, there was not much difference between the trees receiving five pounds and those receiving ten pounds. This indicated that the five pounds did about as well as the heavier application. Neither material gave a residual or carry-ove- r effect from one year to to the next with either the soil or foliar applications. Possibly if soil treatments were applied a number of years in succession, there would be a effect for a few carry-ovyears. In another experiment only one-ha- lf of some trees were Fruit growers hope that sicentists can find control of Iron Chlorsis ever, this process has been streamlined and the volume Increased such that the price has been reduced considerably. Yet, growers still need a more convenient control than the soil treatment Spraying seems to offer the answer. by David R. Walker and R. L. Smith Can a satisfactory spray program be developed to eliminate iron deficiency and correct the iron chlorosis problems In fruit orchards? Fruit growers hope so. The old method of injecting We are testing two materials iron citrate or iron phosphate into the tree trunk haa been (Rayplex iron and Fe 138) in used with some success on both soil and foliar applications. pears, but a less involved, less Our tests so far have indicated method is dethat soil applications are not sired. as effective as spray foliar apA special form of iron called plications in increasing the iron iron chelates has given some in the leaf or greening" the promising results when applied tree. Both types of treatments to the soil. The chelate mater- were applied in late May. In ial has been made such that it August, leaf color was evidentdoes not complex with the soil ly improved in the trees receivand is available for absorption ing soil applications of and pound Fe by roots. The first chelate material was made with synthetic 138 per tree. But were not products manufactured by man. nearly as green as those receivBecause the manufacturing pro- ing foliar sprays of one and cess was so involved, It re- three pounds per 100 gallons sulted in the material being of the same material using three fairly expensive. Recently, how sprays at weekly intervals, or time-consumi-ng one-eigh- th one-four- th er Uintah Basin Standard Thurs., March 24, 1989 Page 4 sprayed to compare the effect of sprayed and unsprayed portions of the same tree and to see how much the material would be translocated or moved from one side to another. Very little, if any, translocation occurred between the sprayed and unsprayed parts. When sprayed with Rayplex Fe the one side was dark green while the other unsprayed side was very pale yellow. Similar results occurred with the Fe 138 treatments, although the color difference was not as striking. We plan to continue these studies for the next few years to see what changes occur within the trees after continual application of iron. We will collect fruit samples and measure firmness, color, shape,' size, sugar and acid content to see what effect the iron treatments have on fruit quality. Ideal Bookkeeping Books for every purpose available at the Standard Office - Rooaeveit. SMOKING ISNT GOOD FOR TRACTORS, EITHER Stop tractor smoking POTATOES and problems it indicates with ... PINK DIESEL FUEL costs you nothing with MP-- NEW D PASTURES MP-- D extra and gives you 5 way better tractor performance . . or most other 1. REDUCES ENGINE DEPOSITS: Pink Diesel Fuel with MP-- works to prevent deposits of products of fuel decomposition which gummy or varnish-likcoat injector plungers or plug nozzle ports. 2. REDUCES ENGINE SMOKE: crops Co-o- p e USE Injection system cleanliness assured by this new additive, prevents development of undesirable exhaust smoke. 3. PROVIDES MORE POWER: ENOUGH . 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