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Now showing items 21-30 of 105
Soil resources, microbial activity, and primary production across an agricultural ecosystem
Author(s):Ellis, Boyd G.; Crum, James R.; Paul, Eldor A.; Klug, Michael J.; Klingensmith, Katherine M.; Robertson, G. Philip
Date Issued:1997-02
Format:born digital; articles
The degree to which soil resource availability is linked to patterns of microbial activity and plant productivity within ecosystems has important consequences for our understanding of how ecosystems are structured and for ...
Controls on soil carbon sequestration and dynamics: lessons from land-use change
Author(s):Conant, Richard; Brewer, Elizabeth; Mellor, Nathan; Morris, Sherri J.; Paul, Eldor A.
Date Issued:2010-03
Format:born digital; articles
Soil carbon (C) dynamics and sequestration are controlled by interactions of chemical, physical and biological factors. These factors include biomass quantity and quality, physical environment and the biota. Management can ...
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 ...
Ecology and the agricultural sciences: a false dichotomy?
Author(s):Paul, Eldor A.; Robertson, G. Phillip
Date Issued:1989-12
Format:born digital; articles
Analysis of the relationship between ecology and agriculture requires an understanding of how the two areas see themselves and each other. Both disciplines have common roots in botany, chemistry, physics, and geology, and ...
Effect of labile inorganic phosphate status and organic carbon additions on the microbial uptake of phosphorus in soils
Author(s):Chauhan, B. S.; Stewart, J. W. B.; Paul, E. A.
Date Issued:1981-05
Format:born digital; articles
The effect of labile inorganic phosphate (Pi) status of the soil on the decomposition of added cellulose and on the immobilization, mineralization, and redistribution of native and added P in soils was studied in a greenhouse ...
Estimation of slow- and fast-cycling soil organic carbon pools from 6N HCI hydrolysis
Author(s):Leavitt, S. W.; Follett, R. F.; Paul, E. A.
Date Issued:1996
Format:born digital; articles
Acid hydrolysis is used to fractionate the soil organic carbon pool into relatively slow- and fast-cycling compartments on soils from Arizona, the Great Plains states and Michigan collected for carbon isotope tracer studies ...
Agriculture's role in greenhouse gas mitigation
Author(s):Paul, Eldor A.; Sheehan, John; Antle, John M.; Paustian, Keith
Date Issued:2006-09
Format:born digital; articles
This report describes opportunities for U.S. agriculture to contribute to reducing net greenhouse gas emissions. The Pew Center on Global Climate Change was established by the Pew Charitable Trusts to bring a new cooperative ...
Analytical determination of concentric carbon gradients within stable soil aggregates = Détermination analytique de gradients concentriques de carbone au sein d’agrégats stables de sol
Author(s):Paul, Eldor A.; Smucker, Alvin J. M.
Date Issued:1998-08
Format:born digital; articles
Soil aggregation dynamics directly control agricultural production and reduce environmental contamination by convection-dispersion sequestrations of most ions. Greater containment and longer residence times of most plant ...
Measuring and understanding carbon storage in afforested soils by physical fractionation
Author(s):Paustian, K.; Paul, Eldor A.; Gregorich, E. G.; Morris, S. J.; De Gryze, S.; Lenders, S.; Callewaert, P.; Six, J.
Date Issued:2002-11
Format:born digital; articles
Forested ecosystems have been identified as potential C sinks. However, the accuracy of measurement and understanding of the underlying mechanisms for soil organic C (SOC) storage in forested ecosystems needs to be improved. ...