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<br />Potassium ~ill be added at the rate of one-fourth pound per tree. Though <br />~ ~ there is an abundance of potassium in these soils it doesn't seem to be available <br />C,;t to the trees. The ~t:r.y leaf samples should sho...' us about 2.5% potassium. <br />f\.. <br />~... Phosphorous seems to be holding at the lo...er limit of the July standard. <br />With the addition of about one-eighth of a pound of phosphorous per tree the <br />May leaf sample should show .3\ or more. If the June leaf samples show excess <br />nitrogen content small amounts (.05 to .10 Ib/tree) will be added to reduce <br />the nitrogen. Caution must be used in the use of phosphorous toward the <br />end of the season for an excess of phosphorous will bring the fruit to <br />maturity too rapidly. <br /> <br />Iron will be added through the system at the rate of one 5# bag of <br />Iron Sequestrene 138 each ...eek until mid July. :inc and manganese will be <br />added a gallon each at the same time to offset the effect of iron addition. <br />Iron ....ill not exceed the 120 p.p.m. level in anyone leaf sample. If it <br />does a couple of weekly treatments will be omitted. <br /> <br /> <br />... <br /> <br />..~ <br />, <br /> <br />\l!"=' <br /> <br />'l.., .....,~.. .~. <br />,~, 4A:,' <br />" ""'.. <br />" <br /> <br />.... <br /> <br />. <br /> <br />Above is a picture of the pump shut off device installed at the Davis <br />place. Several times when the ditch was turned off during the season it <br />worked very well. This is an important feature because the five H.P. motor <br />didn't have a thermal switch to protect it. <br /> <br />This year .....e installed some salini t)" sensors along the drip lines and also <br />...here the trees were furrow irrigated. The Agricultural Research Service is a <br />partner in this study and they have only started to analyse the data. A fe... <br />preliminary observations can be made from the weekly readings. They are: <br /> <br />1. Furro~ Irrigation tends to drive the salts in toward the <br />tree line. <br /> <br />2. Readings were signi ficant 1)' higher under the Furro....' Irrigation. <br /> <br />- 8 - <br />