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The Global ETD Search service is a free service for researchers
to find electronic theses and dissertations. This service is
provided by the
Networked Digital Library of Theses and Dissertations.
Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
Search results
Showing 11 to 20 of 309 (0.026 seconds)| 11 |
The effect of certain plant residues upon the buffer capacity of two Massachusetts soils.Trevett, Moody Francis 01 January 1940 (has links) (PDF)
No description available.
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| 12 |
The role of aluminum in soil acidity /Bhumbla, Dev Raj January 1962 (has links)
No description available.
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Changes in soil pH as a result of cation and anion diffusionRamẓān, Muḥammad January 1970 (has links)
No description available.
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| 14 |
The reactivity of courmaran-2-ones in aqueous solutionHeathcote, David M. January 1998 (has links)
No description available.
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Assessment of critical loads of acidity for selected U.K. upland organic soilsSmith, Carol M. S. January 1993 (has links)
The use of critical loads of acidity to quantify damage to sensitive components of terrestrial and aquatic ecosystems has developed rapidly over the last decade. While much work has focused on defining damage to forested ecosystems, surface waters and groundwaters, there has been little work done on defining critical loads of acidity for ombrotrophic and minerotrophic peat. This thesis presents a modelling approach to quantify damage to ombrotrophic peat ecosystems, since such damage can result in a decline in both surface water quality and the ability of peat to act as an absorbent to aerial pollutants. Initial investigations were concerned with the factors which could be included in investigations of critical loads of N and acidity to the surface organic horizons of forest and moorland soils. The modelling approach was then developed from a series of laboratory-based simulation experiments to investigate the effect of contents of H&'43 , Ca2&'43 and Mg2&'43 in rainfall upon the chemistry of the peat ion exchange complex. The basic tenet of the modelling approach was that ion exchange equilibria for peat is rapid, mineral input to the surface of ombrotrophic peat from mineral weathering is negligible and that atmospheric inputs of wet and dry deposition will dominate the peat chemistry. These simulation experiments provided peat pH values resulting from equilibration with the simulated rainfall. By combining these with databases of atmospheric depositon for the U.K., critical loads of acidity and the present day peat pH were calculated and mapped. The critical load values for peat thus obtained were incorporated in the U.K. Critical Load mapping program, which was used to support the on-going European negotiations of emission reduction within the United Nations Convention on Long-range Transboundary Air Pollution (U.N. E.C.E. C.L.T.A.P.).
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The impact of soil acidity amelioration on groundnut production and sandy soils on groundnut production and sandy soils of ZimbabweMurata, Monica Rujeko. January 1995 (has links)
Thesis (Ph. D.)(Plant Production)--University of Pretoria, 2000. / Title from opening screen (viewed Oct. 6, 2002). Includes bibliographical references.
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Chemical, physical, physiological and agronomic aspects of soil acidity and liming of 10 organic soils from South-West Quebec.Van Lierop, William J. C. M. January 1973 (has links)
No description available.
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Chemical composition and transport of ambient aerosolsChung, Meng-Chen January 2000 (has links)
No description available.
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The influence of dopants on the surface properties of zirconiaKeenan, Matthew January 1997 (has links)
No description available.
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| 20 |
Mathematical oncology and periodic wave train forcingWebb, Steven D. January 2000 (has links)
No description available.
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