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Extraction and charaterization of humus with reference to clay-associated humus
Author(s):Anderson, D. W.; Paul, E. A.; St. Arnaud, R. J.
Date Issued:1974-08
Format:born digital; articles
An extraction-fractionation method was developed with which it is possible to isolate 60–67% of the humus of Chernozemic and Luvisolic soils. Two humic acid fractions were obtained: (1) a conventional alkali-pyrophosphate ...
Effects of cultivation on the organic matter of grassland soils as determined by fractionation and radiocarbon dating
Author(s):Martel, Y. A.; Paul, Eldor A.
Date Issued:1974-11
Format:born digital; articles
The effects of cultivation on the net mineralization of carbon and nitrogen in a lacustrine Brown clay (Sceptre) and two Orthic Black soils on glacial till (Oxbow) were assessed with the aid of fractionation and radiocarbon ...
Fractionation of soil and 15N nitrogen to separate the organic and clay interactions of immobilized N
Author(s):McGill, W. B.; Paul, Eldor A.
Date Issued:1976-08
Format:born digital; articles
Labelled 15N was added to two soils in cylinders in the field, and allowed to equilibrate for two summers of crop growth. The labelled soils were fractionated to provide information on the effect of organic and inorganic ...
Effects of fertilizer N and soil moisture on mineralization, N recovery and A-values, under spring wheat grown in small lysimeters
Author(s):Paul, E. A.; Campbell, C. A.
Date Issued:1978-02
Format:born digital; articles
The influence of rate of fertilizer N and soil moisture on N uptake by spring wheat, N mineralization, A-values and N recovery was determined in small lysimeters on stubble land by means of 15N-labelled KNO3. Net mineralization ...
Effect of carbon additions on soil labile inorganic, organic and microbially held phosphate
Author(s):Chauhan, B. S.; Stewart, J. W. B.; Paul, E. A.
Date Issued:1979-11
Format:born digital; articles
Investigations of the rate of P movement between soil inorganic, organic and biomass P compartments were carried out to clarify aspects of P cycling in soil systems. Organic carbon, as dried grass (33% C, 0.11% P) and ...
Decomposition of 14C-labelled plant material under field conditions
Author(s):Paul, E. A.; Shields, J. A.
Date Issued:1973-08
Format:born digital; articles
Mature, uniformly labelled (14C, 15N), chopped, wheat straw incorporated in the plow layer of a Brown Chernozemic soil and a Gray Wooded soil was allowed to decompose in the field. Labelled grass material (14C) was added ...
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 ...
Effect of soil moisture stress on uptake and recovery of tagged nitrogen by wheat
Author(s):Paul, E. A.; Myers, R. J. K.
Date Issued:1971-02
Format:born digital; articles
Labelled 15NH4NO3 was used in a growth chamber to study the effect of moisture stress on the utilization of nitrogen by wheat. This made it possible to determine the recovery of nitrogen (N) in the soil-plant system of two ...
Use of radiocarbon dating of organic matter in the study of soil genesis, The
Author(s):Paul, Eldor A.; Martel, Y. A.
Date Issued:1974-05
Format:born digital; articles
Radiocarbon dating was used to study the nature and the stability of the organic matter in a range of Chernozemic soils (Borolls) from Saskatchewan. Two catenas, one cultivated, the other not, were studied in detail; the ...
Extraction and measurement of adenosine triphosphate from marine sediment, The
Author(s):Paul, E. A.; Bancroft, K.; Wiebe, W. J.
Date Issued:1976-05
Format:born digital; articles
A technique has been developed, using boiling sodium bicarbonate buffer, to extract adenosine triphosphate (ATP) from marine sediments and has been tested on a variety of sediments, including those with high organic content, ...