Index Catalog // ScholarsArchive@OSU

Monitoring soil nitrate to estimate cover crop nitrogen contribution

Creator:: Andrews, Nicholas, Sullivan, Dan M., and Pool, Kristin
Abstract:: Organic vegetable growers rely on legume cover crops as an economical source of plant-available N. This research evaluated N contributions to summer vegetable crops by cover crops (CC) residues by monitoring soil nitrate (NO3-N) concentrations during the summer crop growing season. Replicated field plots were established with three CC mixes:...
Resource Type:: Presentation

Monitoring soil nitrate to estimate cover crop nitrogen contribution in organic vegetable production fields

Creator:: Andrews, Nicholas, Sullivan, Dan M., and Pool, Kristin
Abstract:: Organic vegetable growers rely on legume cover crops as an economical source of plant-available N. This research evaluated N contributions to summer vegetable crops by cover crops (CC) residues by monitoring soil nitrate (NO3-N) concentrations during the summer crop growing season. Replicated field plots were established with three CC mixes:...
Resource Type:: Conference Proceeding

Estimating in-situ N mineralization rate with a buried bag method

Creator:: Sullivan, Dan M. and Moore, Amber D.
Abstract:: Accurate estimates of soil nitrogen (N) mineralization rate and timing are needed for refining N management practices. This paper describes a buried bag method that has been successfully included within agronomic field trials in the Pacific Northwest, USA. We have found this method to be technically simple and reproducible, and...
Resource Type:: Poster

Reducing over-winter nitrogen loss

Creator:: Hart, John M., Horneck, Donald A., Sullivan, Dan M., and Christensen, Neil W.
Abstract:: Nitrogen can be lost when the quantity of available nitrogen exceeds crop demand or nitrogen availability is not in synchrony with crop demand. Either situation results in accumulation of available nitrogen, primarily in the nitrate form, at the end of the growing season. Over-winter nitrogen loss occurs primarily as nitrate-...
Resource Type:: Conference Proceeding

Shrimp-Processing Byproducts: a source of nitrogen, phosphorus and lime

Creator:: Sullivan, Dan M.
Abstract:: Recent price increases for inorganic fertilizers have renewed interest in the use of nutrient-rich food processing by-products as nutrient sources. On the south Oregon coast, shrimp processing byproducts typically consist of the shrimp shells and heads of the Pacific pink shrimp that have undergone a cooking and peeling process. Shrimp...
Resource Type:: Conference Proceeding

Excel worksheet for calculating agronomic biosolids application rates

Creator:: Sullivan, Dan M.
Abstract:: The worksheet is designed to show a municipal biosolids manager how many acres are needed for land application of biosolids at an agronomic rate, based on crop nitrogen (N) requirements. The worksheet is based on a peer-reviewed Extension publication: PNW 511, Worksheet for Calculating Biosolids Application Rates in Agriculture authored...
Resource Type:: Software or Program Code

Compost quality attributes, measurements and variability

Creator:: Sullivan, Dan M. and Miller, Robert O.
Abstract:: This chapter addresses compost quality specifications, chemical and physical properties of compost, evaluation of compost maturity and stability, and variability in compost analytical data.
Resource Type:: Part of Book

Preplant compost application improves landscape plant establishment and sequesters carbon in compacted soil

Creator:: Sullivan, Dan M.
Abstract:: Preplant compost application increased plant growth and visual appearance of a wide variety of perennial landscape plants. The positive plant growth response to compost was similar for com-post left on the soil surface or compost incorporated via rototilling. Compost application did not alleviate soil compaction. Plant growth response to compost...
Resource Type:: Conference Proceeding

Refining nitrogen management for organic broccoli production

Creator:: Sullivan, Dan M., Peachey, Ed, and Donaldson, Andrew
Abstract:: Specialty organic fertilizers used in organic vegetable production are expensive. So, from environmental and economic perspectives, growers want to maximize nitrogen (N) fertilizer use efficiency by the crop. This research was conducted to (1) determine sufficient N fertilizer rates for organic broccoli, (2) evaluate the efficacy of a specialty organic...
Resource Type:: Presentation

Refining nitrogen management for organic broccoli production

Creator:: Sullivan, Dan M., Peachey, Ed, and Donaldson, Andrew
Abstract:: Specialty organic fertilizers used in organic vegetable production are expensive. So, from environmental and economic perspectives, growers want to maximize nitrogen (N) fertilizer use efficiency by the crop. This research was conducted to (1) determine sufficient N fertilizer rates for organic broccoli, (2) evaluate the efficacy of a specialty organic...
Resource Type:: Conference Proceeding

ScholarsArchive@OSU

Monitoring soil nitrate to estimate cover crop nitrogen contribution

Monitoring soil nitrate to estimate cover crop nitrogen contribution in organic vegetable production fields

Estimating in-situ N mineralization rate with a buried bag method

Reducing over-winter nitrogen loss

Shrimp-Processing Byproducts: a source of nitrogen, phosphorus and lime

Excel worksheet for calculating agronomic biosolids application rates

Compost quality attributes, measurements and variability

Preplant compost application improves landscape plant establishment and sequesters carbon in compacted soil

Refining nitrogen management for organic broccoli production

Refining nitrogen management for organic broccoli production

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