Potential use of milk urea nitrogen to abate atmospheric nitrogen emissions from Wisconsin dairy far

This study evaluates how associative changes in dietary crude protein, milk urea nitrogen, and urinary urea nitrogen affect atmospheric nitrogen emissions from dairy farms while discussing challenges and opportunities


Powell JM, Rotz CA, and Wattiaux MA
Journal of Environmental Quality 2014 Journal Article

Nitrogen- vs. Phosphorus-Based Manure and Compost Management of Corn

This study evaluates the impact of a change from N-based application of manure and compost without incorporation to a P-based (crop-removal) management system with immediate incorporation of manure on corn silage yield and quality, and (ii) soil nitrate, phosphorus, and potassium


Sadeghpour A, Ketterings Q, Godwin GS and Czymmek KJ
Agronomy Journal 2016 Journal Article

Soil properties under nitrogen- vs phosphorus-based manure and compost management of corn

This study evaluates the influence of a change from N-based applications of manure and compost (without incorporation) to P-removal-based management of manure (immediate tillage incorporation) and composted separated dairy solids on soil pH, soil organic matter and soil carbon


Sadeghpour A, Ketterings QM, Vermeylen F, Godwin GS, et al
Soil Science Society of America Journal 2016 Journal Article

Long-term tillage, rotation and perennialization effects on particulate and aggregate soil organic

This study investigates how management varying in crop rotation, tillage intensity and organic management from 1990 to 2013 has affected particulate organic matter and aggregate carbon and nitrogen, and assess the relationship between these soil organic matter fractions and biomass carbon input


Cates AM, Ruark MD, Hedtcke JL, and Posner JL
Soil and Tillage Research 2016 Journal Article

Comparison of process-based models to quantify nutrient flows and greenhouse gas emissions associate

This study uses a whole-farm mass-balance approach to compare five process-based models in terms of predicted carbon, nitrogen and phosphorus flows and potential global warming impact


Veltman K. Jones CD, Gaillard R, Cela S, et al.
Agriculture, Ecosystems and Environment 2017 Journal Article

Under- or over-application of nitrogen impact corn yield, quality, soil, and environment

This study conducts a 5 year study to determine the impact of N fertilizer on corn silage yield, quality, soil properties, farm economics, and nitrogen-use efficiency (NUE)


Sadeghpour A, Ketterings QM, Godwin GS, and Czymmek KJ
Agronomy Journal 2017 Journal Article

Shifting from N-based to P-based manure management maintains soil test phosphorus dynamics in a long

This study evaluates corn fertility management change from N-based applications of manure and compost to a P removal based management of manure and composted separated dairy solids on soil P dynamics over a 5-year corn and 5-year alfalfa rotation


Sadeghpour A, Ketterings QM, Godwin G, and Czymmek KJ
Agronomy for Sustainable Development 2017 Journal Article

Agro-environmental consequences of shifting from nitrogen- to phosphorus-based manure management of

This study evaluates the influence of a corn fertility management change from N-based applications of manure and separated dairy solids to a P-removal-based management of manure


Sadeghpour A, Ketterings QM, Vermeylen F, Godwin GS, et al.
Soil Science Society of America Journal 2017 Journal Article

Nitrogen use efficiencies to grow, feed, and recycle manure from the major diet components feed

This study quantifies soil N input incorporation into the major diet components fed to dairy cows, diet component N secretions in milk N and excretion in manure N constituents, and manure N recycled back through the feed supply


Powell JM, Barros T, Danes M, Aguerre M, et al.
Agriculture, Ecosystems and Environment 2017 Journal Article

Simulating microbial denitrification with EPIC: Model description and evaluation

This paper describes a process-based microbial denitrification submodel implemented in EPIC and tests and tests its ability to reproduce experimental data exhibiting a non-linear response of N2O fluxes to incremental rates of N application


Izaurralde CR, McGill WB, Williams JR, Jones CD et al.
Ecological Modeling 2017 Journal Article

Managing Manure Nitrogen to Reduce Losses

This fact sheet describes different manure management strategies to minimize nitrogen loss while mitigating harmful emissions


Aguirre-Villegas HA, Larson RA, and Ruark MD
UW-Extension Learning Store 2018 Fact Sheet

Dairy Cow Nitrogen Efficiency

This fact sheet highlights one of the main strategies to increase nitrogen use efficiency and reduce nitrogen loss through urine excretion by reducing the ingestion of crude protein, which must be done with caution to avoid underfeeding


Aguirre-Villegas HA, Wattiaux, M, Larson R, Chase L, et al.
UW-Extension Learning Store 2018 Fact Sheet

Nitrogen management on dairy farms

Presents background information and management guidelines for use of N including: crop and soil management, feed storage, herd N management, and manure storage N management


Cornell Extension USA / NY Fact Sheet

Calculating N efficiency Module 1. N efficiency

Presents a method to calculate N requirements for corn (including losses and N efficiencies)


Cornell Extension USA / NY Fact Sheet

The N Cycle Module 1. The N cycle

Presents the N cycle in an interactive way and the major conversion processes: fixation, mineralization, nitrification, denitrification, ammonia volatilization, and immobilization. Also presents nitrate leaching and crop uptake


Cornell Extension USA / NY Fact Sheet

N cycle Soil N cycle

Provides a basic description and diagran of the N cycle in soils (oriented mainly to crops)


Sawyer
Iowa State USA / IA 2012 Fact Sheet

Tillage No-tillage impacts on soil carbon, nitrogen, and water

Describes the advantages and disadvantages of tillage (including N loss)


Dick
Iowa State USA / IA 2012 Fact Sheet

Cover crops Cover crops

Present a general description of the role of cover crops in nutrient recycling


Kladivko
Iowa State USA / IA 2012 Fact Sheet

Cover crops basics Managing cover crops: Cover crops for modern cropping systems

This publication is an introduction to cover crops — it describes cover crop benefits, how to select appropriate covers, common seeding methods, and how to terminate them


Kladivko
Purdue USA / IN 2015 Fact Sheet

cover crops rotations Sustainable crop rotations with cover crops

Presents information about specific attributes of different cover crops grown after each cash crop and for specific purposes (e.g. for nitrogen)


Hoorman et al.
Ohio State USA / OH 2009 Fact Sheet

Cover crops Cover crop fundamentals

Presents the basic description of cover crops


Sundermeier et al
Ohio State USA / OH 2016 Fact Sheet

Nitrogen cycle Soil and applied nitrogen

Present the basics of N fixation, reactions in the soil, N loss mechanisms, sources of N, and environmental effects


Bundy
UW Madison USA / WI 1998 Fact Sheet

N2O emissions from field crops Management of N fertilizer to reduce N2O emissions from field crops (E3152)

Presents a general description of N2O and four main factors to help reduce N2O emissions from field crops: N application rate, fertilizer type, timing of application, placement.


Millar et al
Michigan State USA / MI 2014 Fact Sheet

N2O emissions from crops Research Shows Soybeans Provide Consistent Reduction in Nitrous Oxide Emissions

Provides findings that soybean crops reduce field emissions of nitrous oxide


Castellano
Iowa State USA / IA 2014 Fact Sheet

Tillage and cover crops Using cover crops to convert to no-till

Presents the benefits of using cover crops to migrate to a no-till system, the nitrogen recycling process that takes place


Hoorman et al.
Ohio State USA / OH 2009 Fact Sheet

Cover crops Considerations for cover crops in 2012

Present some considerations to use or not cover crops including trapping nitrate and getting N back


Matt Ruark
UW Madison USA / WI 2012 Fact Sheet

Soil management Climate change and soil management in field crops

Presents ways of managing the soil to reduce CO2 and N2O.


Steinke and Snapp
Michigan State USA / MI 2013 Fact Sheet

Diet strategies to reduce amounts of Nitrogen and Phosphorous in dairy rations

Presents strategies to balance rations and group and feed animals according to their nutrient needs.


Virginia Tech 2009 Fact Sheet

N Basics - the N cycle N Basics - The nitrogen cycle (Fact sheet #2)

N, crops and the environment; N cycle; fixation; mineralization; nitrification; denitrification; volatilization; immovilization; leaching; crop uptake


Johnson et al.
Cornell Extension USA / NY 2005 Fact Sheet