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Measurement of the polysaccharide content of soils
Author(s):Acton, C. J.; Paul, E. A.; Rennie, D. A.
Date Issued:1963-01
Format:born digital; articles
The polysaccharide content of two soils, measured by precipitating and weighing the microbial gums from the fulvic acid fraction of soil organic matter, and by colorimetric analyses using anthrone, was increased appreciably ...
Relationship of polysaccharides to soil aggregation, The
Author(s):Acton, C. J.; Rennie, D. A.; Paul, E. A.
Date Issued:1963-07
Format:born digital; articles
Studies were conducted on two soil types to determine whether variations in level of aggregation, induced by adding wheat straw were accompanied by significant changes in the polysaccharide content of the soils. The addition ...
Nitrate ion electrode method for soil nitrate nitrogen determination
Author(s):Paul, Eldor A.; Myers, R. J. K.
Date Issued:1968-10
Format:born digital; articles
Spectrophotometric measurement of soil color and its relationship to moisture and organic matter
Author(s):Paul, E. A.; Shields, J. A.; Head, W. K.; St. Arnaud, R. J.
Date Issued:1968-10
Format:born digital; articles
The color of soil samples taken from the Ap horizons of Chernozemic and Gray Wooded (Podzolic) soils was measured spectrophotometrically at moisture levels ranging from air-dryness to field capacity. The Munsell re-notations ...
Influence of soil moisture, nitrogen fertilization, and temperature on quality and amino acid composition of Thatcher wheat, The
Author(s):Hutcheon, W. L.; Sosulski, F. W.; Paul, E. A.
Date Issued:1963-07
Format:born digital; articles
The protein content of Thatcher wheat grown in the growth chamber was increased by reduced water supply, nitrogen fertilization, and higher air temperatures. Soil moisture conditions had a greater influence on protein ...
Effect of moisture, temperature, and nitrogen on yield and protein quality of Thatcher wheat
Author(s):Paul, E. A.; Sosulski, F. W.; Lin, D. M.
Date Issued:1966-04-28
Format:born digital; articles
Soil moisture level was the most important factor controlling plant and grain yields while nitrogen fertilizer had the greatest influence on protein content and sedimentation value. Lower temperatures and nitrogen fertilization ...
Behavior of free amino acids in soil
Author(s):Putnam, H. D.; Schmidt, E. L.; Paul, Eldor A.
Date Issued:1960-03
Format:born digital; articles
The behavior of a mixture of amino acids in a soil environment was studied. Extractions were made with 80% ethanol. The extract was concentrated and then was analyzed for amino acids by gradient elution chromatography. ...
Formation of free amino acids in rhizosphere and nonrhizosphere soil
Author(s):Schmidt, E. L.; Paul, Eldor A.
Date Issued:1961-09
Format:born digital; articles
Untreated samples of nonrhizosphere and soybean rhizosphere soils each contained about 15 identified free amino acids totaling 2 to 4 µg. per g. of soil; lysine was the most prevalent amino acid in each preparation. Numerous ...
Factors affecting the accuracy of the carbon-dating method in soil humus studies
Author(s):McCallum, K. J.; Rennie, D. A.; Paul, Eldor A.; Campbell, C. A.
Date Issued:1967-08
Format:born digital; articles
Factors affecting the accuracy of the carbon-dating method of analysis have been discussed by several workers (1, 3, 13, 14). Since, however, these workers were interested primarily in archeological and geological applications ...
Extraction of free amino acids from soil
Author(s):Paul, Eldor A.; Schmidt, E. L.
Date Issued:1960-05
Format:born digital; articles
Alternatives to extraction with ethanol were examined in order to obtain more effective removal of free amino acids from soil. Ba(OH)2 was a promising extractant and proved to be very effective in recovering a mixture of ...