8 



Miss. The DeveloTiment of Chemical Methods for Diagnosing 



Mineral Deficiencies in Mississippi Soils* To determine the 

 exacting solution or solutions which remove quantities of P 

 and K from soils that are most nearly comparable to the P and 

 K levels as determined by crop response to fertilization; 

 study the effect of internal drainage differences, past manage- 

 ment practices, depth of horizons, soil reaction, organic 

 matter content and base exchange capacity on the accuracy of 

 chemical tests in diagnosing P and K requirements; explore 

 the relationship between percentage base saturation and the 

 utilization of exchangeable K by plaints; study importance of 

 anion exchangeable phosphates in plant nutrition. 

 Agron., Soils HD-7 



Mont. Determination of Magnesium in Plant Materials by Flame 



Spec tropho t ome try . To (l) determine quantitatively effects of 

 common anions on magnesium flame intensities; (2) determine 

 quantitatively effects on common cations on magnesium flame 

 intensities; and (3) incorporate results obtained into an ef- 

 fective, rapid procedure for routine detennination of magnesium 

 in plant materials. 



Chem. 57 M.S. 933 



Mont. Phosphate Equilibria in Soils, (l) Investigate different 

 methods for producing a reproducible metal, metal phosphate 

 electrode, or a reproducible membrane electrode sensitive to 

 phosphate ions; and (2) use such an electrode in fairly simple 

 systems of Ca and phosphate ions and solid Ca compounds, and 

 if successful adapt electrode to more complex systems and 

 finally to soils. 



Chem. CR 59 M.S. 966 



Nev. Methods of Assessing Soil Fertility Levels. Obtain im- 

 proved methods of testing soils for N, P, and K, with major 

 attention given to P; and (2) develop method of plant analysis 

 which will indicate an existing level of available nutrients 

 in field. 



Soils, Plant Nutr. 18 



N.J. Evaluation of Greenhouse Soil Testing Methods. To learn 



(1) method of analysis most suitable for evaluating available 

 nutrient content of a wide assortment of greenhouse soils; and 



(2) extent of variation in available nutrient content caused 

 by methods of sampling, rate of watering & leaching the soils; 

 time of sampling with reference to time of watering, effect 

 of applications of fertilizer materials on displacement of 

 nutrients from soils. 



Hort. 336 



