NUGREEM LIMI T ATIONS 



NuGreen has been used as the principal source of nitrogen or as a supplement 

 to soil applications of nitrogen for the past several years* However, there are 

 some limitations in its use which growers should be aware of » 



It should not be applied in combination with the following materials : glyodin 

 (Crag 3I+I), phenyl mercuriesi liquid lime siilfur, D-N materials or soybean flour, 



V/hen used at high concentrations there is more chance of NuGreen causing 

 foliage injury, 



NuGreen applied after the second cover spray may cause the development of 

 poorly colored fruit. 



The use of NuGreen on peaches is questionable, because peach foliage does 

 not appear to be able to absorb much of the urea in the NuGreen spr^ , Any appar- 

 ent benefit from NuGi^en on peaches is probably due to the urea which reaches the 

 soil from the runoff of the sprays. 



In some experimental work with tomatoes it was found that when epsom salts 

 (magnesium siafate) was combined with NuGreen, the magnesium sulfate reduced the 

 rate of intake of urea into the foliage, Yifhile no experimental work has been done 

 with apples, it would seem wise not to include epsom salts ^vith the NuGreen sprays 

 if you wish to get the maximum benefit from the NuGreen, 



— llY, D, Weeks 



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CORRECTING MAGNESim/I DEFICIMCY VflTH EPSOM SALT. SPRAYS 



If the results of the Mcintosh leaf analysis survey which we conducted last 

 summer are any indication of the magnesium status of the orchards in the state, vre 

 can expect about one half of our trees to be either deficient or approaching a de- 

 ficient level in magnesium. 



In orchards which have not had an adequate program of high magnesium lime 

 .. for the past 3 to 5 years it will be necessary to apply magnesium to the trees as 

 epsom salt sprays. Twenty pounds of epsom salts per 100 gallons is the recommended 

 amount of material to use. Two or three applications should be made starting Vfith 

 the calyx or first cover spray. 



The epsom salts may be combined with older standard spray materials such as 

 sulfur, ferbam, lead and DDT, but the compatibility with all of the newer organic 

 materials is not known. If there is any doubt about the compatibility of epsom 

 salts Tfith the spray materials being used, the epsom salts should be appliedas a 

 separate application. The timing of the epsom salt sprays does not have to be as 

 exact as the insect and disease sprays, 



— ^If, D, ViTeeks 

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