ik 



Mass. The Mineral Nutrition of Vegetable Crops as Related to 



the Incidence and Severity of Certain Physiological Disorders * 

 Learn effects of (1) concentrations of mineral elements, 

 especially Ca, on incidence and severity of tipburn on lettuce 

 grown in sand culture; (2) foliar applications of Ca on in- 

 cidence and severity of tipburn on field grown lettuce; (3) 

 concentrations of mineral elements applied to the soil and/or 

 foliage of vegetable plants where deficiencies might be sus- 

 pected to be associated with physiological disorders. 

 Hort. 137 



Mich. Development and Standardization of Methods of Determining 



Nutritional Requirements of Fruit Crops . To establish reli- 

 ability of plant anaylsis as a method of determining nutritional 

 requirements of fruit crops. 

 Hort. $k 



Mich. Absorption and Utilization of Nutrients Applied to Above 



Ground Plant Parts . (1) Evaluate effects of climate, plant 

 characteristics, and nature of applied fertilizer formulation 

 upon "non-root" absorption. (2) Ascertain by greenhouse and 

 field tests the rates (half-times) of foliar absorption of 

 various nutrients, efficiency of fertilizer usage from foliar 

 applications, and the magnitude of nutritional contribution to 

 crop production. (3) Learn mechanism of foliar absorption; the 

 mechanism and significance of foliar loss of nutrients. 

 Hort. 88 



Mo. Mineral Content of Alfalfa and Other Feeds Grown in Missouri. 



Collect (1) samples of early and late cuttings of alfalfa and 

 associated soils from same locations as in '5U and x $6 for 1 more 

 year and from new locations for 2 years; (2) corn stover and ear 

 and associated soil samples at silage stage from 1$ test plots 

 maintained by Dr. Marcus Zuber as was done in '£6. (3) Plant, 

 fertilize, cultivate, maintain, and collect samples from small 

 experimental corn plot, containing varying levels of N and Mo 

 fertilization at South Farm. Analyze (U) alfalfa samples for 

 Ca, Mg, K, B, Fe, Mn, Cu, Co, Zn, Mo, N, S, and P soils for 

 certain of these; corn and soils for same minerals; corn samples 

 for nitrate and total N and Mo, and soil samples for Mo. 

 Chem. Ili7 



Mo. Energetics of Ionic Relationships in Soils and Plants. To 



(1) learn desirable and undesirable balances between major nutri- 

 ent cations of soil in terms of energy relationships between the 

 cations, (2) learn energy levels at which NHj^ and Na in soil in- 

 terfere with the K, Ca, and Mg nutrition of the plant, (3) learn 

 extent that energy level of H affects energy levels of Fe and Mn 

 in soil, (U) learn energy relationship between Fe and Ca, and Mn 

 and Ca as they affect the cationic nutrition of plant, (S>) evalu- 

 ate relative amounts of cations needed in different kinds of soils 

 to establish desirable energy relationships, and (6) learn extent 

 to which nutritional balances of soil as expressed by energy 

 relationships are transmitted to the growing plant. 

 Soils 263 Coop. USDA 



