Mineral Nutrition 



Ariz. Basic Principles Involved in Trace Elenent nutrition of 

 Crops and Availability in Calcareous Soils '. To (1) develop 

 procedures for estimating availability to crops of micro- 

 nutrients in calcareous soils, (2) investigate factors affect- 

 ing availability of certain micronutrients in calcareous soils, 

 (3) determine effect of different degrees of micronutrient 

 deficiencies on crop yield and quality, (U) evaluate availability 

 of different single micronutrient fertilizers to plants, (5) study 

 inter-relationships between rate of applications of major elements 

 to soils and micronutrient deficiencies, (6) investigate fundamental 

 behavior of soil and foliar applications of chelated micronutrients. 

 Hort., Agron. and Range Mgt. 



Ark. Studies of Physiological Factors that Influence the Nutri- 



tional Balance and Development of the Rice Plant . (1) To learn 

 nutrient deficiency symptoms and correlate tissue analysis with 

 these deficiency symptoms, (2) learn possible relationship be- 

 tween mineral balance and straighthead of rice, (3) study effect 

 of soil alkalinity on nutritional balance of plant, (h.) learn 

 effect of cultural practices as spacing, variety and water manage- 

 ment on rice development. 



Agron., PI. Path. 397 Coop. ARS 



Calif. Fixation and Availability of Cations and Anions in Soils. - 

 Chemical and Nutritional Aspect . Investigate: (1) suspected 

 cases of Se poisoning of cattle reported by farm advisors in 

 affected areas; (2) relationship between Se and Fe nutrition of 

 Stanleya. (3) Study methods for Se detection by X-ray spectro- 

 graphy and wet analysis. 



Soils, PI. Nutr. 1023 



Calif. Functional Aspects of Inorganic Elements in Plant Nutrition 



with Special Reference to Micronutrients . To gain a better under- 

 standing of the physiological role of known essential inorganic 

 elements, especially as it may relate to C assimilation; continue 

 search for new essential elements by investigating nutrition of 

 lower plant forms (algae), and of plants growing in special en- 

 vironments (as in sea water). 

 Soils, PI. Nutr. 102U 



Calif. Factors Affecting the Absorption of Minor Elements by the 

 Leaves of Vegetable Plants . To (1) overcome some minor element 

 deficiencies which cause a loss in crop production and a lower- 

 ing of nutritional value of vegetables produced; and (2) find 

 how to overcome the acidity of alkalinity of spray material and 

 form of minor nutrient used in cases where these affect whether 

 or not the nutrient can pass through the cuticle and through cells 

 of the leaf into the conducting tissues. 

 Veg. Crops 1591 



