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The Biogeochemistry of nitrogen and phosphorus cycling in native shrub ecosystems in Senegal

Creator:: Dossa, Ekw'e Lokossou, 1960-
Abstract:: Two native shrub species (Piliostigma reticulatum and Guiera senegalensis) are prominent vegetation components in farmers’ fields in Senegal. However, their role in nutrient cycling and ecosystem function has largely been overlooked. A study including both laboratory and field experiments was conducted to evaluate potential biophysical interactions of the two shrub...
Resource Type:: Dissertation
Full Text:: species with soils and crops in Senegal. Carbon (C), nitrogen (N) and phosphorus (P) mineralization

Influence of cropping and sulfur fertilization on sulfur transformations in soil

Creator:: Castellano, Steven D.
Abstract:: A 2-year field study was conducted on the effects of two sulfur fertilizers (calcium sulfate or elemental S, 0 or 50 kg S ha⁻¹ yr⁻¹) on the distribution of sulfur fractions (inorganic sulfate, C-bonded, ester sulfate, and residual S), arylsulfatase enzyme activity, and microbial biomass carbon (C) and sulfur (S)...
Resource Type:: Masters Thesis
Full Text:: elemental S, 0 or 50 kg S ha-1 yr-I) on the distribution of sulfur fractions (inorganic sulfate, C-bonded

Winter cover cropping effects on integrative biological indicators of soil quality

Creator:: Ndiaye, Evelyne L.
Abstract:: Responses of biological indicators of soil quality to winter cover cropping were measured on soil samples collected from 6 commercial growers' fields and two experiment research stations in the Willamette Valley of Oregon. The research stations were the North Willamette Research and Extension Center (Aurora, OR), and the Oregon State...
Resource Type:: Masters Thesis
Full Text:: . 59 3.2 Pearson coefficients (r) for association between biological parameters and Total C. 67

Field management effects on the thermal stability and activity of soil enzymes in whole soil and aggregates

Creator:: Bandick, Anna Katrina
Resource Type:: Masters Thesis
Full Text:: Pearson correlation coefficients (r) for association between glycosidase activities and total C 35 3.10

Transformations of sulfur in wetland rice soils

Creator:: Islam, M. Mujibul
Resource Type:: Dissertation
Full Text:: SO4-S and reduced-S with a decrease in C-bonded S and SO4-S under continu- ous flooding conditions

The influence of phosphatase-producing bacteria on phosphatase activity and available phosphorus in soil

Creator:: Nelson, Sheila J.
Resource Type:: Masters Thesis
Full Text:: activity was detected for E. carotovora W3C105 at pH 6.5. When grown at 15, 20, 25, and 30° C, three of

Effects of long-term residue management and nitrogen fertilization on availability and profile distribution of nitrogen, phosphorus, and sulfur

Creator:: Christ, Robert A.
Resource Type:: Masters Thesis
Full Text:: slopes from the Residue Utilization Plots. 96 3.6 Soil profile distribution of C-bonded sulfur from the

Cover crops and biochemical functional diversity in relation to nitrogen availability in soil

Creator:: Burket, John Zimmerman
Abstract:: Nitrogen availability in agricultural soils from fertilizer, plant residue inputs, and soil organic matter has important implications beyond crop yield. Legume winter cover crops and one fourth the recommended N rate on sweet corn resulted in yields equivalent to those at the recommended rate in the Willamette Valley of western...
Resource Type:: Dissertation
Full Text:: University, Corvallis OR, USA. 14 Collins, H. P., P. E. Rasmussen, and C. L. Douglas, Jr. 1992. Crop

Effects of organic and inorganic soil amendments of phosphorus sorption

Creator:: Iyamuremye, Faustin
Resource Type:: Dissertation
Full Text:: that dissolved organic C (DOC), pH, ionic strength and basic cations increased in the soils amended

Nitrate leaching and model evaluation under winter cover crops

Creator:: Minshew, Hudson F.
Resource Type:: Masters Thesis
Full Text:: , ranked fourth in abundance after 0, C, and H in living tissues (Vitousek et al., 1997). Every living

ScholarsArchive@OSU

The Biogeochemistry of nitrogen and phosphorus cycling in native shrub ecosystems in Senegal

Influence of cropping and sulfur fertilization on sulfur transformations in soil

Winter cover cropping effects on integrative biological indicators of soil quality

Field management effects on the thermal stability and activity of soil enzymes in whole soil and aggregates

Transformations of sulfur in wetland rice soils

The influence of phosphatase-producing bacteria on phosphatase activity and available phosphorus in soil

Effects of long-term residue management and nitrogen fertilization on availability and profile distribution of nitrogen, phosphorus, and sulfur

Cover crops and biochemical functional diversity in relation to nitrogen availability in soil

Effects of organic and inorganic soil amendments of phosphorus sorption

Nitrate leaching and model evaluation under winter cover crops

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