kl 



Ohio The Response of the Peach to Different Cultural Practices, 

 and Rates of Nitrogen Fertilization as Indicated by Growth^ 

 Yield, Quality of Fruit, and Mineral Composition of the Foliage, 

 To learn (1) systems of culture best adapted to establishment of 

 peach orchards on old orchard sites; (2) effect of mulch upon 

 nutritional status of tree with particular reference to fruit 

 quality; (3) relation of nutrient content of foliage to quantity 

 and quality of fruit produced; and (h) practicability of rapid 

 methods of determining soluble nutrient content of leaf tissue 

 as guide for fertilizer recommendations for peach. 

 Hort. 21 





Oreg. Soil Structure; Its Alteration, Influence on Plant Growth 

 and Measurement ! To (1) test under greenhouse and field con- 

 ditions, certain practices and amendments to obtain effects on 

 plant growth, yield and soil properties; (2) evaluate immediate 

 and lasting effects of certain soil amendments on structure of 

 different soils under laboratory conditions; and (3) improve 

 existing methods or develop new methods of evaluating soil 

 structure. 



Soils 187 (W-30) 



S. Dak. The Influence of Aeration and Mechanical Impedance on Crop 

 Yields . Learn physical properties of soils affecting aeration, 

 and mechanical impedance and tolerance limits of these physical 

 properties that influence plant growth. 

 Agron. 30U (NC-17) 



Tenn. Root Development of Farm Crops as Related to the Physical 

 and Chemical Characteristics of the SoTT l (1) Correlate root 

 growth, rate of penetration and maximum depth attained, with 

 physical and chemical characteristics of soil pro fie. (2) Learn 

 top-root ratios of a given crop on different soils. 

 Agron. f>l Coop TVA 



Tenn, The Influence of Chemical, Physical, and Mineralogies! 



Properties of Soils on Nutrient Availability and Plant Growth . 

 (1) Learn chemical, physical, and miner alogical properties of 

 profile samples from some of 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. $$ (S-UO 



Tenn. Trace Elements in Tennessee Agriculture Crops . (1) Learn 

 which soil properties are associated with trace element defi- 

 ciencies. (2) Study ways by which trace element deficiencies 

 may be corrected. (3) Establish levels of trace elements in 

 soils and plants associated with deficient and normal growth of 

 several crops. (U) Relate trace element content of plants to 

 their content of other mineral elements. 

 Agron. £6 



