- 11 - 



Oreg, Nutrition of Tree Fruit Crops in the Rogue Valley Area . 

 To (1) learn nutritional status of tree fruit crops grown 

 in Rogue Valley; (2) learn aost effective and econoaiical 

 source of any fertilizer nutrient foiind lacking in orchards; 

 (3) learn best time euad aethod of placement of fertilizers; 

 (k) learn effects of soil applied nutrients upon soil 

 physiccd. and chemical conditions emd effects of a soil or 

 foliar applied nutrient upon uptake and utilization of other 

 nutrient elements; (5) evaluate effects of fertilizers on 

 storage life, superficial and ground color, flavor, textvire, 

 etc.; (6) learn N and mineral nutrient requireiaents for 

 fruits; and, (7) correlate plant and soil composition in 

 development of diagnostic and prognostic procedures. 

 Hort, 276 Coop. ARS 



Oreg, Nutrition of Tree Fruit Crops in the Mid-Coluabia Area . 

 To (1) learn nutritional status of orchards; (2) Learn N and 

 mineral nutrient needs for various fruits grown in area; (3) 

 learn amounts of fertilizers needed to maintain orchttrds at 

 or above critical nutrient level; (k) learn effects of climate 

 on vise of plemt nutrients and on tree response to applied 

 fertilizers; (5) leeum effect of fertilizers uxK>n uptake and 

 use of nutrient elements with special reference to tree response 

 in growth and x>roduotivity; (6) correlate plant and soil com- 

 position in development of possible diagnostic and prognostic 

 procedure; (7) evaluate effects of nutrients and of added 

 fertilizer on storage life, superficial and grouzul color, 

 flavor, texture, flmaess and size; and, (S) develop techniques 

 and catalog information for differentiating between syn^toms of 

 mineral deficiencies or excesses and syxq>toms or expressions 

 of plant viruses, with special reference to stone fruit. 

 Hort. 277 



Pa, The Use of Surveys to Determine "Optimum Values" of 



Nutrient -Element Leaf Concentrations . To determine lei? con- 

 centrations of vario\;is essential elements in major horticul- 

 tural crops which are associated with desired responses as 

 affected by fertilization, soil, and climatic conditions. 

 Hort. 87^ -A 



Pa. Nutrient -Element Deficiencies in Hortlcultureil Crops . 



To study (1) use of leaf analyses in confirming visual dlag- 

 nosls; and, (2) value of various nutrient-containing materials 

 in correcting these symptoms when applied to soil or as foliage 

 sprays . 



Hort. 87^ -B 



