Now showing items 1-9 of 9
Use of tracers and computer simulation techniques to assess mineralization and immobilization of soil nitrogen
Contributor:Paul, Eldor A.; Juma, N. G.
The objectives of this investigation were to develop and test concepts of microbial growtth and decay in soil and to study the mineralization and inmobilization of soil N using tracer and computer simulation techniques.
Nutrient and energy flows through soil microbial biomass
Contributor:Paul, Eldor A.; Voroney, R. P.
The recognition and recent studies of the role of living organisms (biomass) in carbon, nitrogen and phosphorus flows in nature have stressed the role of the microorganisms as sources and sinks for nutrients, in addition ...
Organic C dynamics in grassland soils. 2. Model validation and simulation of the long-term effects of cultivation and rainfall erosion
Contributor:Paul, E. A.; Voroney, R. P.; Van Veen, J. A.
The amounts of organic matter in native prairie and in an adjacent cultivated field were compared with the output from a simulation model describing organic matter dynamics. The effects of past and possible future soil ...
Carbon economy of soybean-rhyzobium-glomus associations
Contributor:Paul, E. A.; Harris, D.; Pacovsky, R. S.
Carbon uptake and allocation in plants that were largely dependent on microbial symbionts for N and P was compared to that in plants given inorganic fertilizer. Soybeans (Glycine max L. Merr.) were grown in sterilized soil ...
Ecology and the agricultural sciences : a false dichotomy?
Contributor:Paul, Eldor A.; Robertson, G. Phillip
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
Contributor:Chauhan, B. S.; Stewart, J. W. B.; Paul, E. A.
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 ...
Automated analysis of 15N and 14C in biological samples
Contributor:Paul, Eldor A.; Harris, D.
An automated method for the simultaneous analysis of total N, total C, 15N and 14C in small plant and soil samples is described. A commercial C-N analyser - continuous flow isotope ratio mass spectrometer (ANCA-MS) has ...
Decomposition of wheat straw and stabilization of microbial products
Contributor:Voroney, R. P.; Anderson, D. W.; Paul, E. A.
This research examined the effects of soil environment on the decomposition of cereal crop residues and stabilization of microbial products in the field. Microplots at semi-arid and subhumid field sites were amended with ...
Organic carbon dynamics in grassland soils. 1. Background information and computer simulation
Contributor:Paul, E. A.; Van Veen, J. A.
The decomposition rates of 14C-labelled plant residues in different parts of the world were characterized and mathematically simulated. The easily decomposable materials, cellulose and hemicellulose, were described as being ...