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Microscopic counting and adenosine 5'-triphosphate measurement in determining microbial growth in soils
Contributor:Paul, E. A.; Johnson, R. L.
A microscopic technique utilizing dispersion of fungal hyphae in a Waring blender, filtration through membrane filters (Nucleopore Corp.), and counting on a fluorescence microscope was developed for counting fungal hyphal ...
Visions of a more precise soil biology
Contributor:Coleman, D. C.; Paul, Eldor A.; Magid, J.; Kätterer, T.; Kirchmann, H.; Andrén, O.
Soils have often been viewed as a black box. Soil biology is difficult to study with the precision we would wish, due to the presence of considerable soil heterogeneity, a huge diversity of organisms, and a plethora of ...
Mineralizable soil nitrogen : amounts and extractability ratios
Contributor:Paul, Eldor A.; Juma, N. G.
Studies were conducted on a 15N-labeled Weirdale loam, a Dark Gray Chernozemic soil (Boralfic Boroll) to (i) determine the amounts of N released by several methods previously used to obtain an estimate of potentially ...
Use of radiocarbon dating of organic matter in the study of soil genesis, The
Contributor:Paul, Eldor A.; Martel, Y. A.
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 ...
Effects of fertilizer N and soil moisture on mineralization, N recovery and A-values, under spring wheat grown in small lysimeters
Contributor:Paul, E. A.; Campbell, C. A.
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 ...
Gaseous nitrogen losses from cropped and summer-fallowed soils
Contributor:Aulakh, M. S.; Rennie, D. A.; Paul, E. A.
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, ...
Extraction and charaterization of humus with reference to clay-associated humus
Contributor:Anderson, D. W.; Paul, E. A.; St. Arnaud, R. J.
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 ...
Metabolism of labeled organic nitrogen in soil : regulation by inorganic nitrogen
Contributor:Rice, Charles W.; Smith, M. Scott; Paul, Eldor A.
Regulation of organic N metabolism by inorganic N availability was investigated in short-term laboratory incubations of soil. A 14C-, 15N-labeled organic N substrate was produced by growing Pseudomonas stutzeri in labeled ...
Fate of legume and fertilizer nitrogen-15 in a long-term cropping systems experiment
Contributor:Janke, Rhonda R.; Peters, Steven E.; Paul, Eldor A.; Hesterman, Oran B.; Harris, Glendon H.
Relying more on biological N2 fixation has been suggested as a way to meet one of the major challenges of agricultural sustainability. A 15N study was conducted to compare the fate of applied legume and fertilizer N in a ...
Microbial Efficiency-Matrix Stabilization (MEMS) framework integrates plant litter decomposition with soil organic matter stabilization : do labile plant inputs form stable soil organic matter?, The
Contributor:Wallenstein, Matthew D.; Denef, Karolien; Boot, Claudia M.; Cotrufo, M. Francesca; Paul, Eldor A.
The decomposition and transformation of above- and below-ground plant detritus (litter) is the main process by which soil organic matter (SOM) is formed. Yet, research on litter decay and SOM formation has been largely ...