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 Varieties 



Hawaii Introduction and Testing of Tropical Fruits and Nuts 

 in Havraii , To test newly introduced tropical fruits and 

 nuts for possible value under Hawaiian conditions. New 

 introductions will be planted and grown for observation 

 and evaluation. They will include: miscellaneous tropical 

 fruits and nuts, avocado and mango, citrus, lychee and 

 longan, guava, and passion fruit. To these mig^t be added 

 the banana, strawberry and coffee, 

 Hort, 157 



P, R, Effect of Variety on Coffee Yields in Puerto Rico . To 



determine the higjhest yielder among the most promising coffee 

 varieties of the Arabian group when planted at different 

 levels , 



Agron,, Hort, 21 Coop, Federal Experiment Station, Mayaguez 



Ciilt\are 



Ariz, Factors Affecting the Production of Citrus in Arizona . 

 To study (1) rootstock effects and nursery management; (2) 

 adaptation of new varieties and strains; (3) soil manage- 

 ment in relation to nutrition; (k) nutritional and growth 

 stimulating sprays; (5) citrus irrigation; and, (6) low 

 temperature effects, surveys, grove heating, 

 Hort, 299 Coop, m^A 



Ariz, Response of Citrus Trees to Soil Moisture; Movement of 

 Soil Moisture in the Root Zone . To learn (1) effect of soil 

 moisture on tree growth and condition, fruit yield, size and 

 quality, and most economical use of water, study factors asso- 

 ciated with different levels of soil moisture which influence 

 tree condition; (2) effect of moisture stresses in fall on 

 fruit production and quality; and, (3) amount of water deple- 

 tion from root zone which is caused by evaporation and perco- 

 lation to l«Jwer depths. 

 Hort. 371 Coop. ARS 



Ariz. Protection of Citrus Trees and Fruit from Freezing Injury . 

 Learn most efficient methods of operation and effectiveness 

 of wind machines and orchard heaters in raising temperatures 

 during freezes. Investigate physiological conditions of tree 

 in relation to tolerance to cold, 

 Hort, 38^ Coop, USBC-Wl 



