Robert L. Mikkelsen

Works (39)

Updated: March 10th, 2025 12:14

2007 article

Phosphorus Losses in Runoff after Application of Litter from Broilers Fed High‐Available Phosphorus Corn Feed

Tarkalson, D. D., & Mikkelsen, R. L. (2007, July 1). Communications in Soil Science and Plant Analysis.

By: D. Tarkalson* & R. Mikkelsen n

author keywords: algal-available phosphorus; broiler litter; HAP corn; reactive phosphorus; runoff; total phosphorus
topics (OpenAlex): Soil and Water Nutrient Dynamics; Phytase and its Applications; Phosphorus and nutrient management
UN Sustainable Development Goals Color Wheel
UN Sustainable Development Goal Categories
2. Zero Hunger (Web of Science)
Source: Web Of Science
Added: August 6, 2018

2006 article

Polyethersulfone Membrane Filters for Sampling Soil Water fromIn SituSoils and Intact Soil Columns for Phosphate Analysis

Nelson, N. O., & Mikkelsen, R. L. (2006, February 14). Communications in Soil Science and Plant Analysis.

By: N. Nelson * & R. Mikkelsen n

author keywords: suction lysimeter; soil water sampling; leachate collection; phosphorus leaching; soil solution
topics (OpenAlex): Soil and Water Nutrient Dynamics; Soil and Unsaturated Flow; Groundwater and Isotope Geochemistry
UN Sustainable Development Goals Color Wheel
UN Sustainable Development Goal Categories
14. Life Below Water (Web of Science)
15. Life on Land (Web of Science)
Source: Web Of Science
Added: August 6, 2018

2005 journal article

Balancing the phosphorus budget of a swine farm: A case study

Journal of Natural Resources and Life Sciences Education, 34, 90–95.

By: N. Nelson & R. Mikkelsen

Source: NC State University Libraries
Added: August 6, 2018

2005 journal article

Fertilizer use for horticultural crops in the US during the 20th century

HortTechnology, 15(1), 24–30.

By: R. Mikkelsen & T. Bruulsema

Source: NC State University Libraries
Added: August 6, 2018

2005 article

Field‐Scale Evaluation of Phosphorus Leaching in Acid Sandy Soils Receiving Swine Waste

Nelson, N. O., Parsons, J. E., & Mikkelsen, R. L. (2005, October 12). Journal of Environmental Quality.

By: N. Nelson *, J. Parsons n & R. Mikkelsen n

MeSH headings : Animal Husbandry / methods; Animals; Manure; Phosphorus / metabolism; Soil; Soil Pollutants / metabolism; Swine
topics (OpenAlex): Soil and Water Nutrient Dynamics; Soil and Unsaturated Flow; Soil erosion and sediment transport
TL;DR: Monitoring P leaching in soils with a long-term history of waste application, relate soil solution P concentrations to soil P status, and quantify PLeaching losses found low P sorption in Blanton and Autryville soils. (via Semantic Scholar)
UN Sustainable Development Goals Color Wheel
UN Sustainable Development Goal Categories
2. Zero Hunger (Web of Science)
6. Clean Water and Sanitation (OpenAlex)
Source: Web Of Science
Added: August 6, 2018

2004 article

Nitrogen Mineralization of Anaerobic Swine Lagoon Sludge as Influenced by Seasonal Temperatures

Moore, A. D., Mikkelsen, R. L., & Israel, D. W. (2004, April 9). Communications in Soil Science and Plant Analysis.

By: A. Moore n, R. Mikkelsen n & D. Israel n

topics (OpenAlex): Phosphorus and nutrient management; Soil and Water Nutrient Dynamics; Wastewater Treatment and Nitrogen Removal
TL;DR: While initial rates of net N mineralization differed, N availability predicted from first order equations was similar for all temperature regimes after one year of incubation and averaged 74% of the total N applied. (via Semantic Scholar)
UN Sustainable Development Goals Color Wheel
UN Sustainable Development Goal Categories
2. Zero Hunger (Web of Science)
13. Climate Action (Web of Science)
14. Life Below Water (Web of Science; OpenAlex)
15. Life on Land (Web of Science)
Source: Web Of Science
Added: August 6, 2018

2004 article

Nitrogen availability of anaerobic swine lagoon sludge: sludge source effects

MOORE, A. (2004, July 23). Bioresource Technology.

By: A. Moore n

author keywords: swine lagoon sludge; nitrogen; N mineralization; aerobic incubation
MeSH headings : Agriculture / methods; Animals; Biological Availability; Linear Models; Models, Chemical; Nitrogen / analysis; North Carolina; Sewage / chemistry; Soil / analysis; Swine; Time Factors
topics (OpenAlex): Soil and Water Nutrient Dynamics; Phosphorus and nutrient management; Wastewater Treatment and Nitrogen Removal
TL;DR: The lack of significant company or type of swine operation effects on sludge N mineralization suggests that use of the same plant N availability coefficient for sludge from different types of lagoons is justifiable. (via Semantic Scholar)
UN Sustainable Development Goals Color Wheel
UN Sustainable Development Goal Categories
2. Zero Hunger (Web of Science)
6. Clean Water and Sanitation (OpenAlex)
13. Climate Action (Web of Science)
14. Life Below Water (Web of Science)
15. Life on Land (Web of Science)
Source: Web Of Science
Added: August 6, 2018

2004 article

Runoff Phosphorus Losses as Related to Phosphorus Source, Application Method, and Application Rate on a Piedmont Soil

Tarkalson, D. D., & Mikkelsen, R. L. (2004, July 1). Journal of Environmental Quality.

By: D. Tarkalson* & R. Mikkelsen n

MeSH headings : Agriculture; Animals; Biological Availability; Chickens; Eukaryota / physiology; Fertilizers; Manure; Phosphorus / analysis; Rain; Refuse Disposal; Soil Pollutants / analysis; Water Movements; Water Pollutants / analysis
topics (OpenAlex): Soil and Water Nutrient Dynamics; Hydrology and Watershed Management Studies; Phosphorus and nutrient management
TL;DR: Results for this study can be used by P loss assessment tools to fine-tune P source, application rate, and application method site factors, and to estimate extreme-case P loss from cropland receiving broiler litter and inorganic P fertilizers. (via Semantic Scholar)
UN Sustainable Development Goals Color Wheel
UN Sustainable Development Goal Categories
2. Zero Hunger (Web of Science)
Source: Web Of Science
Added: August 6, 2018

2004 article

Runoff Phosphorus Losses as Related to Soil Test Phosphorus and Degree of Phosphorus Saturation on Piedmont Soils Under Conventional and No-Tillage

Tarkalson, D. D., & Mikkelsen, R. L. (2004, January 1). Communications in Soil Science and Plant Analysis.

By: D. Tarkalson * & R. Mikkelsen n

author keywords: soil test phosphorus; degree of phosphorus saturation; reactive phosphorus; algal-available phosphorus; total phosphorus
topics (OpenAlex): Soil and Water Nutrient Dynamics; Wastewater Treatment and Nitrogen Removal; Pesticide and Herbicide Environmental Studies
UN Sustainable Development Goals Color Wheel
UN Sustainable Development Goal Categories
2. Zero Hunger (Web of Science)
Source: Web Of Science
Added: August 6, 2018

2003 article

A phosphorus budget of a poultry farm and a dairy farm in the southeastern U.S., and the potential impacts of diet alterations

Tarkalson, D. D., & Mikkelsen, R. L. (2003, July 1). Nutrient Cycling in Agroecosystems.

By: D. Tarkalson* & R. Mikkelsen n

author keywords: dairy; low phytic acid corn; phosphorus; phytase; poultry
topics (OpenAlex): Soil and Water Nutrient Dynamics; Animal Nutrition and Physiology; Phosphorus and nutrient management
TL;DR: The use of new feed technology and expanding waste application to a larger land base can significantly alter the P budgets of broiler and dairy farms and reduce P surpluses, minimizing the risk of environmental problems. (via Semantic Scholar)
UN Sustainable Development Goals Color Wheel
UN Sustainable Development Goal Categories
2. Zero Hunger (Web of Science)
Source: Web Of Science
Added: August 6, 2018

2003 article

Separation of Soil Organic Phosphorus Compounds Using Reverse-Phase Ion-Pair Chromatography

Leytem, A. B., & Mikkelsen, R. L. (2003, April 28). Communications in Soil Science and Plant Analysis.

By: A. Leytem* & R. Mikkelsen*

topics (OpenAlex): Phosphorus and nutrient management; Nitrogen and Sulfur Effects on Brassica; Analytical Chemistry and Chromatography
Source: Web Of Science
Added: August 6, 2018

2003 article

Struvite precipitation in anaerobic swine lagoon liquid: effect of pH and Mg:P ratio and determination of rate constant

Nelson, N. O., Mikkelsen, R. L., & Hesterberg, D. L. (2003, June 9). Bioresource Technology, Vol. 89, pp. 229–236.

By: N. Nelson n, R. Mikkelsen n & D. Hesterberg n 

Contributors: N. Nelson n, R. Mikkelsen n & D. Hesterberg n 

author keywords: magnesium-ammonium-phosphate; struvite; solubility curve; animal waste treatment; crystal growth; phosphorus; precipitation kinetics
MeSH headings : Anaerobiosis; Animals; Chemical Precipitation; Hydrogen-Ion Concentration; Kinetics; Magnesium / analysis; Magnesium / chemistry; Magnesium Compounds / chemistry; Phosphates / chemistry; Phosphorus / analysis; Phosphorus / chemistry; Struvite; Swine; Waste Management / methods; Water / chemistry
topics (OpenAlex): Phosphorus and nutrient management; Constructed Wetlands for Wastewater Treatment; Wastewater Treatment and Nitrogen Removal
TL;DR: The results indicate that induced struvite formation is a technically feasible method to remove N and P from swine lagoon liquid and it may allow swine producers to recover nutrients for off-farm sale. (via Semantic Scholar)
UN Sustainable Development Goals Color Wheel
UN Sustainable Development Goal Categories
Sources: Web Of Science, NC State University Libraries, ORCID
Added: August 6, 2018

2003 article

Using Tobacco By‐products as a Nitrogen Source for Container‐Grown Houseplants

Mikkelsen, R. L. (2003, June 10). Journal of Plant Nutrition.

By: R. Mikkelsen n

author keywords: nitrogen mineralization; slow-release fertilizer; salinity; sterile media
topics (OpenAlex): Composting and Vermicomposting Techniques; Plant tissue culture and regeneration; Growth and nutrition in plants
UN Sustainable Development Goals Color Wheel
UN Sustainable Development Goal Categories
Source: Web Of Science
Added: August 6, 2018

2002 article

Monitoring phosphorus mineralization from poultry manure using phosphatase assays and phosphorus-31 nuclear magnetic resonance spectroscopy

Crouse, D. A., Sierzputowska-Gracz, H., Mikkelsen, R. L., & Wollum, A. G. (2002, May 28). Communications in Soil Science and Plant Analysis, Vol. 33, pp. 1205–1217.

By: D. Crouse n , H. Sierzputowska-Gracz n, R. Mikkelsen n & A. Wollum n

topics (OpenAlex): Soil and Water Nutrient Dynamics; Soil Carbon and Nitrogen Dynamics; Environmental Toxicology and Ecotoxicology
UN Sustainable Development Goals Color Wheel
UN Sustainable Development Goal Categories
2. Zero Hunger (Web of Science)
Sources: Web Of Science, NC State University Libraries
Added: August 6, 2018

2002 article

Sorption of organic phosphorus compounds in Atlantic coastal plain soils

Robert L. Mikkelsen; April Beth Leytem; James Gilliam

topics (OpenAlex):
Source: NC State University Libraries
Added: August 6, 2018

2001 article

GREENHOUSE EVALUATION OF FOUR BORON FERTILIZER MATERIALS

Byers, D. E., Mikkelsen, R. L., & Cox, F. R. (2001, March 31). Journal of Plant Nutrition.

By: D. Byers n, R. Mikkelsen n & F. Cox n

author keywords: boron fertilizer; Granubor; Colemanite; Ulexite; Hydroboracite; micronutrient; plant uptake; alfalfa; Medicago sativa
topics (OpenAlex): Plant Micronutrient Interactions and Effects
UN Sustainable Development Goals Color Wheel
UN Sustainable Development Goal Categories
2. Zero Hunger (Web of Science)
Source: Web Of Science
Added: August 6, 2018

2001 article

SOYBEAN AS A RECEIVER CROP FOR NITROGEN IN SWINE LAGOON EFFLUENT

Israel, D. W., & Mikkelsen, R. L. (2001, July 1). Soil Science.

By: D. Israel* & R. Mikkelsen n

author keywords: soybean; N-15 natural abundance; nitrogen receiver; nitrogen nutrition; lagoon effluent; waste management
topics (OpenAlex): Legume Nitrogen Fixing Symbiosis; Soybean genetics and cultivation; Nematode management and characterization studies
TL;DR: The results show that nodulating soybeans can recover as much applied effluent N in seed as a 6.3 Mg/ha (100 bu/ac) corn crop. (via Semantic Scholar)
UN Sustainable Development Goals Color Wheel
UN Sustainable Development Goal Categories
2. Zero Hunger (Web of Science)
Source: Web Of Science
Added: August 6, 2018

2000 article

Beneficial Use of Swine By‐Products: Opportunities for the Future

Mikkelsen, R. L. (2000, January 1). Soil Science Society of America Book Series.

By: R. Mikkelsen n

Ed(s):

topics (OpenAlex): Agriculture Sustainability and Environmental Impact; Meat and Animal Product Quality; Animal Nutrition and Physiology
Source: NC State University Libraries
Added: August 6, 2018

2000 journal article

Container substrate temperatures affect mineralization of composts

HortScience, 35(1), 16–18.

By: H. Kraus, R. Mikkelsen & S. Warren

Source: NC State University Libraries
Added: August 6, 2018

2000 conference paper

Nitrogen loss and transformations in croplands receiving applications of swine lagoon effluent

Animal, agriculture and food processing waste: 8th Symposium, (2000), 588–596. St. Joseph, Michigan: American Society of Agricultural Engineers.

By: J. Hernandez, C. Cobb & R. Mikkelsen

Source: NC State University Libraries
Added: August 6, 2018

2000 journal article

Nutrient management for organic farming: A case study

Journal of Natural Resources and Life Sciences Education, 29(2000), 88–92.

By: R. Mikkelsen

Source: NC State University Libraries
Added: August 6, 2018

2000 article

Optimization of sample ph and temperature for phosphorus‐31 nuclear magnetic resonance spectroscopy of poultry manure extracts

Crouse, D. A., Sierzputowska‐Gracz, H., & Mikkelsen, R. L. (2000, January 1). Communications in Soil Science and Plant Analysis, Vol. 31, pp. 229–240.

By: D. Crouse n , H. Sierzputowska‐Gracz n & R. Mikkelsen n

topics (OpenAlex): Metabolomics and Mass Spectrometry Studies; Cassava research and cyanide; Pesticide and Herbicide Environmental Studies
UN Sustainable Development Goals Color Wheel
UN Sustainable Development Goal Categories
2. Zero Hunger (Web of Science)
Sources: Web Of Science, NC State University Libraries
Added: August 6, 2018

2000 journal article

Spatial variability of phosphorus retention capacities for various fields

Proceedings of the 5th International Conference on Precision Agriculture, Bloomington, Minnesota, USA, 16-19 July, 2000, 1.

By: J. Jenkins, D. Crouse , R. Mikkelsen & R. Heiniger 

Source: NC State University Libraries
Added: August 6, 2018

2000 conference paper

Spatial variability of soil pH, phosphorus, copper and zinc in fields receiving long-term applications of animal manure

Animal, agriculture and food processing waste: 8th Symposium: American Society of Agriculture Engineers, 2000, (2000), 597–601. St. Joseph, Michigan: American Society of Agricultural Engineers.

By: B. Robert, D. Crouse , R. Mikkelsen, R. Heiniger  & W. Robarge

Source: NC State University Libraries
Added: August 6, 2018

2000 conference paper

Struvite formation to remove phosphorus from anaerobic swine lagoon effluent

Animal, agriculture and food processing waste: 8th Symposium: American Society of Agriculture Engineers, 2000, (2000), 18–26. St. Joseph, Michigan: American Society of Agricultural Engineers.

By: N. Nelson, R. Mikkelsen & D. Hesterberg 

Source: NC State University Libraries
Added: August 6, 2018

2000 article

The role of low molecular weight organic acids from decomposing rye in inhibiting root-knot nematode populations in soil

McBride, R. G., Mikkelsen, R. L., & Barker, K. R. (2000, November 1). Applied Soil Ecology.

By: R. McBride n, R. Mikkelsen n & K. Barker n

author keywords: low molecular weight organic acids; Meloidogyne incognita (root-knot nematode); Secale cereale (rye); soil amendment
topics (OpenAlex): Nematode management and characterization studies; Legume Nitrogen Fixing Symbiosis; Plant Disease Management Techniques
TL;DR: Although low molecular weight organic acids may be one of many factors that contribute to restriction in root-knot nematode damage, these acids do not appear to be solely responsible for the nematicidal effect of the rye. (via Semantic Scholar)
UN Sustainable Development Goals Color Wheel
UN Sustainable Development Goal Categories
2. Zero Hunger (Web of Science)
13. Climate Action (Web of Science)
15. Life on Land (OpenAlex)
Source: Web Of Science
Added: August 6, 2018

1999 journal article

A comparison of three methods for determining root-knot nematode infection of cotton roots

Nematropica, 29(2), 147–151.

By: R. McBride, R. Mikkelsen & K. Barker

Source: NC State University Libraries
Added: August 6, 2018

1999 article

Effects of Soil Calcium and pH on Seed Germination and Subsequent Growth of Large Crabgrass (Digitaria sanguinalis)

Pierce, G. L., Warren, S. L., Mikkelsen, R. L., & Linker, H. M. (1999, June 1). Weed Technology.

By: G. Pierce n, S. Warren n, R. Mikkelsen n & H. Linker n

author keywords: large crabgrass; Digitaria sanguinalis (L.) Scop. #(3) DIGSA; calcifuge; integrated pest management; integrated weed management
topics (OpenAlex): Seedling growth and survival studies; Turfgrass Adaptation and Management; Soil Management and Crop Yield
TL;DR: By raising soil pH levels, the growth of large crabgrass and its ability to compete with turfgrass may be reduced and raising exchangeable Ca does not appear to be an effective management tool for control of this weed species. (via Semantic Scholar)
UN Sustainable Development Goals Color Wheel
UN Sustainable Development Goal Categories
2. Zero Hunger (Web of Science)
13. Climate Action (Web of Science)
15. Life on Land (OpenAlex)
Source: Web Of Science
Added: August 6, 2018

1999 article

Estimating the availability of nutrients from processed swine lagoon solids through incubation studies

Duffera, M., Robarge, W. P., & Mikkelsen, R. L. (1999, December 1). Bioresource Technology.

By: M. Duffera n, W. Robarge n & R. Mikkelsen n

author keywords: swine lagoon; incubation; N mineralization; phosphorus; micronutrients
topics (OpenAlex): Soil and Water Nutrient Dynamics; Phosphorus and nutrient management; Soil and Unsaturated Flow
UN Sustainable Development Goals Color Wheel
UN Sustainable Development Goal Categories
2. Zero Hunger (Web of Science)
Source: Web Of Science
Added: August 6, 2018

1999 article

Greenhouse evaluation of processed swine lagoon solids as a fertilizer source

Duffera, M., Robarge, W. P., & Mikkelsen, R. L. (1999, November 1). Journal of Plant Nutrition.

By: M. Duffera n, W. Robarge n & R. Mikkelsen n

topics (OpenAlex): Soil and Water Nutrient Dynamics; Phosphorus and nutrient management; Wastewater Treatment and Nitrogen Removal
UN Sustainable Development Goals Color Wheel
UN Sustainable Development Goal Categories
2. Zero Hunger (Web of Science)
Source: Web Of Science
Added: August 6, 2018

1999 journal article

Groundwater nitrate depletion in a swine lagoon effluent-irrigated pasture and adjacent riparian zone

Journal of Soil & Water Conservation, 54(4), 651–656.

John E. Parsons; James Gilliam; Robert L. Mikkelsen; A. J. Sloan

Source: NC State University Libraries
Added: August 6, 2018

1999 conference paper

Nitrogen dynamics and buffer zones

Buffer zones: Their processes and potential in water protection: The proceedings of the International Conference on Buffer Zones, (1999), 54–61.

By: J. Gilliam, J. Parsons & R. Mikkelsen

Source: NC State University Libraries
Added: August 6, 2018

1999 article

Survival and infection of root-knot nematodes added to soil amended with rye at different stages of decomposition and cropped with cotton

McBride, R. G., Mikkelsen, R. L., & Barker, K. R. (1999, December 1). Applied Soil Ecology.

By: R. McBride*, R. Mikkelsen* & K. Barker*

author keywords: biocontrol; Meloidogyne incognita; Secale cereale
topics (OpenAlex): Nematode management and characterization studies; Plant Disease Management Techniques; Weed Control and Herbicide Applications
TL;DR: It is suggested that it is not necessary to plant cotton immediately after plowing in a rye cover crop, thereby providing some flexibility in the cotton planting date, minimizing any associated phytotoxicity to the young cotton plants. (via Semantic Scholar)
UN Sustainable Development Goals Color Wheel
UN Sustainable Development Goal Categories
2. Zero Hunger (Web of Science)
13. Climate Action (Web of Science)
Source: Web Of Science
Added: August 6, 2018

1999 article

The use of poultry litter as co-substrate and source of inorganic nutrients and microorganisms for the ex situ biodegradation of petroleum compounds

Williams, C. M., Grimes, J. L., & Mikkelsen, R. L. (1999, July 1). Poultry Science.

By: C. Williams n, J. Grimes n & R. Mikkelsen n

author keywords: poultry litter; biodegradation; petroleum hydrocarbons; nitrogen; phosphorus
MeSH headings : Animals; Biodegradation, Environmental; Chickens; Feces; Petroleum; Turkeys
topics (OpenAlex): Pesticide and Herbicide Environmental Studies; Microbial bioremediation and biosurfactants; Radioactive element chemistry and processing
TL;DR: The results showed that the remediation of soil contaminated with petroleum compounds is significantly enhanced when supplemented with poultry litter ( pelleted or nonpelleted) in concentrations of 10% soil volume, demonstrating the potential for a specialized market for the use of poultry litter. (via Semantic Scholar)
Source: Web Of Science
Added: August 6, 2018

1998 conference paper

Stream water level control to enhance riparian buffer effectiveness removing nitrate-nitrogen

Drainage in the 21st century: Food production and the environment: Proceedings of the seventh International Drainage Symposium, 551–558. St. Joseph, Michigan: American Society of Agricultural Engineers.

By: J. Parsons, J. Gilliam & R. Mikkelsen

Ed(s):

Source: NC State University Libraries
Added: August 6, 2018

1997 article

Agricultural and Environmental Issues in the Management of Swine Waste

Mikkelsen, R. L. (1997, July 1). ACS Symposium Series.

By: R. Mikkelsen n

Ed(s):

topics (OpenAlex): Phosphorus and nutrient management; Soil and Water Nutrient Dynamics; Composting and Vermicomposting Techniques
UN Sustainable Development Goals Color Wheel
UN Sustainable Development Goal Categories
2. Zero Hunger (Web of Science)
13. Climate Action (Web of Science)
14. Life Below Water (Web of Science)
Source: Web Of Science
Added: August 6, 2018

1997 journal article

Providing students with an international exposure to soil fertility

Journal of Natural Resources and Life Sciences Education, 26(1), 69–70.

By: R. Mikkelsen

Source: NC State University Libraries
Added: August 6, 2018

1995 article

Using hydrophilic polymers to improve uptake of manganese fertilizers by soybeans

Mikkelsen, R. L. (1995, January 1). Nutrient Cycling in Agroecosystems.

By: R. Mikkelsen n

author keywords: GELLED FERTILIZER; GLYCINE MAX (L) MERR; MICRONUTRIENT; POLYACRYLAMIDE
topics (OpenAlex): Polymer-Based Agricultural Enhancements; Legume Nitrogen Fixing Symbiosis
UN Sustainable Development Goals Color Wheel
UN Sustainable Development Goal Categories
2. Zero Hunger (OpenAlex)
Source: Web Of Science
Added: August 6, 2018

1993 article

Addition of gel-forming hydrophilic polymers to nitrogen fertilizer solutions

Mikkelsen, R. L., Behel, A. D., & Williams, H. M. (1993, January 1). Nutrient Cycling in Agroecosystems.

By: R. Mikkelsen n, A. Behel* & H. Williams*

author keywords: FESCUE; GUAR; NITROGEN LEACHING; SLOW-RELEASE FERTILIZER; UREA AMMONIUM NITRATE
topics (OpenAlex): Polymer-Based Agricultural Enhancements
UN Sustainable Development Goals Color Wheel
UN Sustainable Development Goal Categories
Source: Web Of Science
Added: August 6, 2018

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