-69 - 



Ariz. Lemon Production InrproYement in Arizona , (l) Soil mois- 

 ture in relation to irrigation needs of lemon trees, (2) 

 Nutritional needs of lemon trees in State, (3) Pruning needs 

 of lemon trees in Arizona, 

 Sort, k03 



Calif, The Grovth of Citrus and Other Crops as Affected by- 

 Minor Elements . To (1) develop methods of sufficient sensi- 

 tivity for detection and estimation of Co, Cr, Ni, V, etc; 



(2) investigate requirements of citrus and other crops for 

 these and other elements and determine symptoms in deficiencies; 



(3) study toxic effects of various elements on crops; (h) study- 

 methods of application for essential minor elements and effects 

 of trea-tment upon yield, growth, etc, of plan-ts; and, (5) 

 study- effects of variation in supply of minor elements upon 

 absorption of major essential elements, 



89118 and piaat ITutr • 102^ 



Calif, A Study of Citrus Orchard Soils vith Special Reference 



to the Possible Deleterious Effect of Past Fertilizations! and 

 Cultural Practices . The points to be investigated are: The 

 chemical, physical, and biological characteristics of citrus 

 orchard soils in vhich yields, quality, and sizes are excellent 

 in comparison with -those in problem orchards; and the effects 

 of -varioxis fertilizational and cultural practices on -the chem- 

 ical, physical, and biological characteristics of orchard soils. 

 Soils and Plant Nutr, 1188 



Calif, Plant Growth Regula-bors in Relation -bo -the Fhysiology of 



CitruiT To (1) determine -the manner in which mature fruit drop, 

 increased fruit size, and increased storage life of citrus may 

 be regulated by the use of plant hormones, investigating effects 

 of plant growth regulators on photosyn-thesis, respiration, trans- 

 piration, translocation, cell elongation, etc; (2) evaluate 

 new or i>artially field-tested materials for their effects on 

 functioning of plants, using lab and greenhouse -techniques; 

 and, (3) investigate possibility of extending xise of plant 

 growth regulators -bo control of other plant processes, using 

 information developed under objective (l). 

 Plant Biochem, 13^ 



Hawaii Coffee Yields and Grade as Influenced by Pruning and CvlL - 

 txiral Methods , To (1) s-tudy economic increases in yield and" 

 quality, and reduction of harvesting costs in relation -to -those 

 of pruning and fertilization; (2) gain preliminary evidence on 

 new pruning systems; and, (3) new planting -to be set out in 19^9 

 in which new pruning sys-tems will be initiated about 1953* 

 Hort, l66 



