- About
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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 131 to 140 of 1047 (0.053 seconds)| 131 |
Experiments on the Inactivation of Zinc by the Mineral Fractions of the SoilHassett, John J. 01 May 1967 (has links)
Zinc deficiency, in many cases, is closely related to organic matter decomposition. DeRemer and Smith (1964) studied the effects of decomposing sugar beet tops on the reactions of Zn65 in a Portneuf soil. They found that with time the Zn65 associated with lime minerals, eschangable, and water soluble fractions of the soil decreased, while that found with the organic and mineral fractions increases. This increase in the mineral fraction is of particular interest, since the majority of the Zn65 was found to be with this fraction after a period of time. They also showed that the increase in Zn65 associated with sand-silt size fraction after a rough separation was greater than with the clay fraction. Smith, Henry, and Shourky (1965) studied the Zn65 associated with the organic fraction as it changed with time. They found that the Zn65 associated with the fulvic acid increased rapidly during early incubation periods, but in the later incubation periods had decreased considerably and was found in the mineral fraction. Shourky (1966), in a study of the effect of decomposing organic matter on the available Zn65 as determined with various reagents, found that after 12 weeks incubation a great portion of the Zn65 was found associated with the mineral fraction.
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Influence of genetically modified cell wall mutants on carbon dioxide and nitrous oxide emissions from soil: A study with «Arabidopsis thaliana»Gul, Shamim January 2012 (has links)
No description available.
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Simulating changes in soil organic carbon in Bangaladesh with the denitrification-decomposition (DNDC) modelShahid, Syeda Rubyat January 2012 (has links)
No description available.
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Nitrous oxide emissions and denitrification potential of fertilized grassland soils in Western NorwayBernard, Marie-Eve January 2011 (has links)
No description available.
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Soil properties and the response of rice production to water regime and fertilizer source in low fertility soils of the Republic of PanamaTurmel, Marie-Soleil January 2011 (has links)
No description available.
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Development of a non-dispersive infrared carbon dioxide sensor-based system for assessing soil toxicity using substrate-induced respirationKaur, Jasmeen January 2015 (has links)
No description available.
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Greenhouse gas emissions from drip irrigated tomato fieldsEdwards, Kerri January 2014 (has links)
No description available.
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| 138 |
Nitrogen fertilization and soil mineral nitrogen dynamics to optimize canola yield and nutrition in QuébecSu, Jinghan January 2013 (has links)
No description available.
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| 139 |
Labile organic nitrogen fractions: characteristics, dynamics and significance to soil nitrogen supply in agricultural soilsSt Luce, Mervin January 2013 (has links)
No description available.
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Greenhouse gas emissions from cranberry fields under irrigation and drainage in QuebecGrant, Angela January 2014 (has links)
No description available.
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