13 



Miss. The Chemical and Mlneralogical Properties of Soils in 

 Relation to Soil Development* To determine (l) occurrence 

 and distribution of clay minerals in selected soil series; 

 (2) exchange properties and other chemical and physical 

 characteristics of different soil separates of selected 

 soil series; (3) relation of chemical properties and mineral 

 constituents to soil development and the usefulness of these 

 properties in soil classification; and (u) relation of chemi- 

 cal properties and mineral constituents to potassium and 

 phosphorus fixation and release in those soil series on >riiich 

 fixation and release studies have been completed. 

 Agron. RRFD-3 (S-U) 



Mo. The Characteristics and Development of Heavy Clays in 



the Soils of Missouri. T o broaden and deepen our knowledge 

 of the nature of clays in soils, and of their mode of forma- 

 tion by electrochemical characterization of pure clay minerals 

 and mineralogical and chemical vrork on silt and sand fractions. 

 Soils 6 



Pa. The Relationships of the Mineral Composition of the Soils 



of Pennsylvania to Their Agricultural Value. To (1) determine 

 relation of various clav minerals in Pennsvlvania soils to fixa- 

 tion and release of K; (2) structure of clay minerals instrumental 

 in fixation processes; (3) means of application of K as a fer- 

 tilizer taking into account fixation capacities of soils to 

 attempt to bring about more economical use of K by plants; (U) 

 distribution and kind of feldspars in soils and relation of these 

 minerals to their potential productivity; and (5) evaluate 

 trace element content of feldspars in Pennsylvania soils. 

 Agron. 1193 



Tenn. The Influence of Chemical. Physical, and Mineralogical 



Properties of Soils on Nutrient Availability and Plant Growth. 

 (1) Learn chemical, physical, and mineralogical properties of 

 profile samples from some of the major agricultural soils of state 

 and region; (2) relate above properties to nutrient fixation and 

 release to plants; (3) study reaction of fertilizer materials 

 with soils having different chemical and mineralogical properties 

 and their relation to nutrient availability to plants. 

 Agron. 55 (S-U) 



Texas The Mineralogical and Chemical Properties of Soils and 

 Their Relationship to the Physical Properties of Soils. Soil 

 Fertility^ and Soil Development and Morphology . To (l) inventory 

 the mineralogical composition and chemical properties of selected 

 soils; (2) study relationship of mineralogical composition to 

 chemical and physical properties of the soil; (3) evaluate mineralogi- 

 cal composition of soil as it relates, in general, to availability 

 or non-availability of plant nutrients, with emphasis as it 

 relates toK,NHAand P fixation; and (u) use results obtained 

 as supplementary information in classifying soils as well as 

 further our concepts to soil development and morphology. 

 Agron. 928 (S-I4) 



