Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 8 of 8 for “"Soil mineral-N"”.
-
Development of Nitrogen rate Recommendations for No-till Dryland Grain Sorghum in Virginia
… and (iv) to study the influence of residual soil profile mineral-N (nitrate and ammonium) on sorghum response to applied N fertilization. Multi-location field studies were conducted over three years. A range of N treatments of various starter-band and side-dress N rates were applied. The …
-
Balancing water quality, nitrogen management, and corn production goals in Illinois
… compared to pre-season N application alone, but soil N2O emissions also increased by 27%. Corn yields were not significantly affected by in-field management practices, indicating no agronomic tradeoffs. An analysis of 32 site-years of crop and soil data found that soil mineral N provided …
-
Evaluating soil productivity and climate change benefits of woody biochar soil amendments for the US Interior West
… climate impacts. Proponents claim biochar soil amendments offer a comprehensive solution to enhance soil capacity to deliver water and nutrients to plants while decreasing climate impacts through reduced nitrous oxide (N2O) emissions from fertilizer use and carbon (C) sequestration. This …
-
Biodiversity and agro-ecology in field margins
… From environmental concern, the reduction of soil mineral N nearby the boundary by the presence of a margin strip was responsable for the increase in abundance of less competitive species and enrichment of species diversity within the semi-natural boundary.
-
The Lasting Effects of Prescribed Fire and Harvesting on Forest Floor and Soil Nutrients in the Eastern Sierra Nevada Mountains
… little is known about their long-term effects on soil fertility, forest health, and water quality. The objective of this study was to quantify the lasting effects of prescribed fire and thinning on forest floor and soil nutrients approximately eight to nine years after a burn occurred within two …
-
Study of nitrogen limitation and seed nitrogen sources for historical and modern genotypes in soybean
… are the biological N fixation (BNF) and the soil mineralization processes. On overall, only 50-60% of soybean N demand is met by the BNF process. An unanswered scientific knowledge is still related to the ability of the BNF to satisfy soybean N demand at varying yield levels. Seed N demand …
-
Rhizodeposition and its effects on C fluxes in the soil
… of energy for microorganisms strongly affecting soil organic matter (SOM) dynamics. Although, rhizodeposition is a key driver of microbially mediated processes in the soils, it still remains the most uncertain component of the terrestrial carbon (C) cycle. The input of C through rhizodeposition …
-
Mitigation strategies for nitrous oxide emissions based on fertilization management of irrigated crops in a mediterranean climate = Estrategias de mitigación de óxidos de nitrógeno basadas en el manejo de la fertilización en cultivos de regadío bajo clima mediterráneo
… tipo y composición del fertilizante (orgánico ó mineral), del C orgánico añadido o residual del propio suelo y de los sistemas de riego (por goteo o a surco). Para conseguirlo, se han llevado a cabo cuatro experimentos, 2 ensayos de campo y 2 ensayos de laboratorio. Cada uno de ellos se resume a …