11 



Maine Effect of Fertilizers, Liming, and Cultural Treatments 



on Crops for Processing" To (1) further study amounts and 

 ratios of fertilizer needed to produce large yields of high 

 quality processing crops; (2) further study amounts of lim- 

 ing materials needed to maintain given pH and calcium levels 

 in soil, without increasing incidence of potato scab, and 

 effect of these different levels on yields; (3) determine 

 most efficient placement of small amounts of lime and effect 

 on yields; (U) study most efficient placement of fertilizer 

 and proper time of application in rotation; (£) determine 

 best seeding rates for peas, sweet corn, and beans, and 

 proper spacing of broccoli plants commensurate with highest 

 yields of processing materials; (6) study effects of side- 

 dressing applications with N at various times upon growth 

 and quality of beans, sweet corn, and broccoli; (7) study 

 and improve planting, cultivation, and harvesting practices 

 for processing crops; (8) determine adaptability of new 

 varieties for processing in Maine; (9) study effects of growth 

 regulators and nutrient sprays on maturation and fruit-setting 

 in beans and peas; (10) evaluate effect of harvest date on 

 yield and quality of beans and peas; (11) determine if early 

 removal of primary head of broccoli can be done without reduc- 

 ing yield; and (12) study effect of field freezing on broccoli 

 quality, 



Hort., Agron. 7h 



Md. The Role of Trace Elements in Plant Nutrition , To (1) 



pursue the lead and further test the theory that the role of 

 boron in plants is one of facilitating the translocation of 

 sugar from the leaves to the young leaves and to the stem and 

 root tips; (2) determine if there is an additional role of 

 boron in plants such as regulation of rate of water entry and 

 percent moisture in plant tissues and, if so, the mechanism of 

 action; (3) determine the role or roles of boron in germination 

 and further growth of pollen grains; (U) determine relationship 

 of boron to the redistribution of carbohydrates from regions of 

 storage to other cells and tissues within stored fruits and 

 vegetables, which should indicate if various types of internal 

 spotting and breakdown, under boron deficiency, are caused by 

 an inadequacy of sugar movement in absence of sufficient boron; 

 (5>) study flow of sugars from leaves to various portions of 

 intact plants subjected to a series of boron concentrations; 

 (6) study any and all factors that might affect water-soluble 

 and total boron concentrations within plants; and (7) determine 

 relationship between movement of sugar and movement of certain 

 other substances, such as hormones, within plants. 

 Bot. K-8-c Coop. ARS 



