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<br />~ <br /> <br />00 <br />~ <br /> <br />-2- <br /> <br />,-- <br />-' <br /> <br />::.-) <br />.::.:; <br /> <br />It is noy apparent that Yithout the leaf samples we <br />to add the normal amount of nitrogen in the Spring. <br />whole crop yould have been severely damaged. <br /> <br />might have proceeded <br />Most probably the <br /> <br />This experience has opened up a whole new field of inquiry for us-- <br />that of plant nutrition. under trickle irrigation. vie have found that the <br />limited area of active root feeding causes the trees to react more <br />noticeably to the presence or absence of nutrients that are placed in <br />the system. Many questions have not been answered for this locality. In <br />Arizona and California a pound of nitrogen per tree seems to be ideal <br />for their long graYing season and lighter soils. It: is very possible <br />that in this area ye might use as much as a pound per tree, but other <br />nutrients You1d have to be held in proper balance aced a foliar application <br />* <br />of Alar yould be needed to bring the crop to matur:lty on time. <br /> <br />We are then entering a yhole ney field of endeavor where the reyards <br />are high and so are the risks. Fortunately for us there has come upon <br />the scene a very knoYledgeable and highly trained research scientist. <br />Anthony Hatch, Ph.D., is Director of the C.S.U. Orchard Mesa Unit. He <br />has consented to plan our program of plant nutrition. We have nay set a <br />goal to double our 1973 production in 1975. <br /> <br />With a soil sample this Fall, Ye hope to, plan ae balanced nutritional <br />input through the system during the summer. A monthly leaf sample Yi1l <br />be taken to check the effect of our nutrient program. <br /> <br />The filter plant yill be expanded to include a third IS-inch sand <br />filter and the sediment pond will be deepened and enlarged. A centrifical <br />separator yill be added to separate the larger solids and the water meter <br />yill be moved to the inlet side of the pond to lower the head requirement <br />on the pumps. <br /> <br />For the record Ye yish to present production data for the farm, <br />You yill note that the 1972 season Yas a complete loss. Last year there <br />was considerable frost damage and for most groyers the production was <br />about 60% of normal. <br /> <br />In the Fall of 1974 we made some spot checks on emitters throughout <br />the orchard. It is apparent that many of the emitters have become <br />restricted. Next Spring we yill flush each emitter befor the start of the <br />irrigation season. <br /> <br />------------------------------------------------------------------------- <br /> <br />*M . f . <br />ent~on 0 companles or <br />recommendation or endorsement <br />over others not mentioned. <br /> <br />commercial products does not imply <br />by the Colorado Water Conservation Board <br />