Wash. The Availability of Potassium in Western Washington Soils* 



To (l) evaluate Western Washington soils by relative ability 

 to release potassium under controlled conditions; (2) determine 

 soil properties affecting potassium needs; (3) devise, if 

 feasible, methods suitable to rapid characterization of soils 

 as to ability to release potassium; (A.) correlate measures 

 of potassium release with potassium uptake by cropping under 

 controlled conditions; and (5) evaluate exchangeable potassium 

 supplying power of Western Washington soils. 

 Agron. 902 



For more infonnation on research in this category, see 

 Section b, T. FERTILITY AND FERTILIZERS. 



B. Soil and Plant Analyses; Methods 



Alaska Alaskan Soil Fertility Levels as Indicated by Rapid Soil 



Analysis. To (l) correlate rapid soil testing techniques with 

 plant growth responses, particularly as to N, phosphate and 

 potash; (2) develop and adapt reliable quick tests for minor 

 elements; and (3) correlate minor element quick tests with 

 plant growth responses. 

 Soils Sci. 1 



Hawaii The Form of Nitrogen in Grasses Following Nitrogen 



Fertilization. To (l) determine forms and distribution of 

 N in Panicimi and Napier grasses; and (2) study relationship 

 of N to phosphorus and potash in Napier grass. 

 Soils, Agr. Chem. 622.5 



HI. Methods in the Spec tro graphic Analysis of Soils and Plants 



for Minor Elements. To (l) develop rapid, accurate, and re- 

 producible methods for determination of Cu, Zn, Mo, Co, and Fe; 

 (2) investigate fully the possibility of direct exsunination of 

 the minor elements in plant; and (3) study solution techniques 

 in spectrographic analysis. 

 Agron. 15 -3 61 



111. The Composition and Chemical Nature of Soil Organic Matter. 



To determine (l) chemical nature and composition of soil organic 

 matter; and (2) how the chemical nature and composition of soil 

 organic matter is influenced by composition of parent plant 

 material, type of inorganic colloid found in the soil, manurial 

 and fertilizer treatments, and other management procedures. 

 Agron. 15-395 (NC-17) 



