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Minn. Physiological Studies of Fruit Crops as Related to Growth 

 and Developnent l To (1) study fruit plants to leom their 

 ability to resist low teaperatures , the relationship of plant 

 structure and physiological behavior to cold resistance, and 

 effects of envlronnental or ciiltureJ. factors upon stirvlval; 

 (2) screen new growth regulating chemicals for use In certain 

 applicable ^ases of tree and small fruit production, test 

 new or additional uses for these materials In fruit plantings, 

 and to undeirtake bauslc physiological studies to learn mode 

 of physiological action of the chemicals; (3) study response 

 of fruit plants to photoperlod \inder controlled length of day 

 conditions; and, (k) make survey to learn general nutrient 

 level of fruit plants in major producing aresis of the state, 

 and make mineral analyses of plant tissues to be correlated 

 with appropriate plant responses, 

 Hort. 212.k 



Mo. Nutrition of Fruit Plants . To (l) study correlations be- 



tween available essential nutrient element content of soil, 

 content of elements in plant tissues ajid performance of crop 

 plant in established pleuatings for major fruit growing regions; 

 (2) learn optimum levels of major and minor nutritive elements 

 for fruit plants under State conditions; (3) learn most prac- 

 tical methods for indicating nutritive needs of plfiuits; (k) 

 develop more satisfactory methods of applying nutrients to 

 plants; (5) study relation between certain physical properties 

 of soil and availability of minersU. elements to fruit plants; 

 and, (6) study absorption and use of nutrients by plants 

 dioring hl^ ajid low levels of available moisture, 

 Hort. k 



N. H. Temperature Relations in Horticultxiral Plants Under New 



Hampshire Conditions . To learn effect of (1) various pigments, 

 paints, and metal reflectors on winter hardiness of fruit 

 trees; (2) mulches on soil tenrperature arovmd roots of horti- 

 cultural plants; (3) xiniformly low temperature on winter hardi- 

 ness of such plants; (li-) to learn Importance of obtaining 

 temperature records on favorable sites; and, (5) maintain a 

 base station for recording climatological data. 

 Hort. kO 



N. H. Nutritional Studies with Horticultural Plants . To (l) 



determine causes and prevention of leaf scorch; (2) study effect 

 of animal manures on leaf scorch and nutrition, and of (3) 

 organic compounds of laineral nutrients as compared with in- 

 organic forms on leaf scorch and plant response in genercLL; 

 (k) determine factors causing mineral deficiencies; and, (5) 

 effect of mulches on mineral nutrition. 

 Hort., Agr. Chem., Blochem., Bot. kl 



