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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 ...
Natural nitrogen-15 abundance of soil and plant samples
Author(s):Rennie, D. A.; Johns, L. E.; Paul, E. A.
Date Issued:1976-02
Format:born digital; articles
Nitrogen isotope analysis of total soil N and soil-derived nitrate for nine selected Chernozemic and Luvisolic Ap horizons showed mean δa15N values based on atmospheric abundance of 8.8. Luvisolic soils were characterized ...
Gaseous nitrogen losses from soils under zero-till as compared with conventional-till management systems
Author(s):Paul, Eldor A.; Rennie, D. A.; Aulakh, M. S.
Date Issued:1984-01
Format:born digital; articles
The gaseous losses of N from conventional-till (CT) and zero-till (ZT) crop fields were 3 to 7 and 12 to 16 kg N ha−1 y−1, respectively. In contrast, losses from CT and ZT fallow were severalfold higher, namely, 12 to 14 ...
Influence of plant residues on denitrification rates in conventional and zero tilled soils, The
Author(s):Paul, Eldor A.; Rennie, D. A.; Aulakh, M. S.
Date Issued:1984-07
Format:born digital; articles
A field study was conducted with treatments consisting of a factorial combination of N (0 or 100 kg N ha−1 as (NH4)2SO4, straw (0 or 3000 kg ha−1), and two tillage treatments. Ground straw was mixed with the plow layer of ...
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 ...
Applicability of the carbon-dating method of analysis to soil humus studies
Author(s):McCallum, K. J.; Rennie, D. A.; Paul, Eldor A.; Campbell, C. A.
Date Issued:1967-09
Format:born digital; articles
The organic fraction of soil is known to be composed of the soil biomass, partially decomposed plant and animal residues, and the materials commonly referred to as humic substances. Knowledge of the persistence of these ...
Investigations of the dynamics of soil humus utilizing carbon dating techniques
Author(s):Rennie, D. A.; Campbell, C. A.; Paul, Eldor A.; McCallum, K. J.
Date Issued:1964
Format:born digital; articles
The radioactivity of naturally occurring C14 in soil humus when compared to the C14 activity of a standard of recent origin (carbon dating) can be used to estimate the mean residence time of the soil humus in studying ...
Effect of various clover management practices on gaseous N losses and mineral N accumulation, The
Author(s):Aulakh, M. S.; Rennie, D. A.; Paul, E. A.
Date Issued:1963-08
Format:born digital; articles
A 2-yr field study was carried out to assess gaseous losses of N as N2O + N2 from two Black Chernozemic soils, where during year 1 wheat was underseeded to clover and in year 2, the clover in late June was (a) green-manured ...
Gaseous nitrogen losses from cropped and summer-fallowed soils
Author(s):Aulakh, M. S.; Rennie, D. A.; Paul, E. A.
Date Issued:1982-02
Format:born digital; articles
A study designed to assess gaseous losses of N as N2O and N2 from soils of conventional till fields seeded to wheat in the Chernozemic soil region of Saskatchewan, together with limited supporting laboratory investigations, ...