Question: Arden Hills, Minnesota is the headquarters for the agricultural cooperative that focuses on which industry?
Context: The Matador Cooperative Farm, later known as the Matador Farming Pool, was an agricultural cooperative started on 10,000 acres of land near the town of Kyle, Saskatchewan in Canada.  The land was donated by the provincial government and the cooperative was formed in 1946.  The first members were a group of seventeen returning World War II veterans.  Membership in the cooperative gradually declined, and the farm was sold to the Saskatchewan Land Bank Commission in 1975.  Ten members leased some of the land and assets back, including the Kyle Seed Cleaning Plant and the Swift Current plant, which cleaned lentils, chick peas, and peas.  The group also continued to raise wheat and cattle.  In 2011, the cooperative disbanded and its assets were sold. Land O'Lakes, Inc. is a member-owned agricultural cooperative based in the Minneapolis-St.  Paul suburb of Arden Hills, Minnesota, focusing on the dairy industry.  The co-op states that it has about 3,600 direct producer-members, 1,000 member-cooperatives, and about 10,000 employees who process and distribute products for about 300,000 agricultural producers; handling 12 billion pounds of milk annually.  It is ranked third on the National Cooperative Bank Co-op 100 list of mutuals and cooperatives.  The co-op is one of the largest producers of butter and cheese in the United States. American Crystal Sugar Company is an agricultural cooperative specializing in the production of sugar and related agri-products.  American Crystal is owned by nearly 2,800 shareholders who raise approximately one-third of the nation’s sugarbeet acreage in the Red River valley of Minnesota and North Dakota.  Additional acres are contracted in eastern Montana and western North Dakota.  As the largest beet sugar producer in the United States, the company utilizes innovative farming practices, low-cost production methods, and sales and marketing leadership to produce and sell about 15 percent of America’s sugar.  American Crystal operates sugar factories in Crookston, East Grand Forks, and Moorhead, Minnesota; Drayton and Hillsboro, North Dakota; and Sidney, Montana, under the name Sidney Sugars Incorporated.  The company’s technical services center and corporate headquarters are also located in Moorhead. ZEN-NOH (全農 , Zennō ) , National Federation of Agricultural Co-operative Associations (全国農業協同組合連合会 , Zenkoku Nōgyō Kyōdō Kumiai Rengōkai ) , is a federation of agricultural cooperatives in Japan.  ZEN-NOH was formed in 1972 with the joining of the ZENHANREN group (National Marketing Federation of Agricultural Cooperative Associations) and the ZENKOREN group (National Purchasing Federation of Agricultural Cooperative Associations).  ZEN-NOH consists of 1,173 agricultural cooperatives and federations that in 2004 had a combined revenue of $53.8 billion (USD).  ZEN-NOH is involved in the marketing, tracking, and quality assurance of the products of its cooperatives.  As of 2006, ZEN-NOH has declared that it will not participate in the research and development of genetically modified foods.  ZEN-NOH is one of the world's largest importers of animal feeds and agricultural fertilizers.  70% of the sales of chemical fertilizers in Japan are handled by them.  ZEN-NOH is also largely involved in the production of farming equipment, primarily tractors. Sherm Chavoor (1919 – September 3, 1992) was an swimming coach from the United States.  He notably coached Olympic swimmers Mark Spitz, Debbie Meyer and Mike Burton, among others at Arden Hills Swimming, a swim club in Carmichael, California, which he founded in 1954.  Chavoor coached at the Sacramento YMCA prior to starting Arden Hills. Valias Agricultural Cooperative (Persian: شركت تعاوني كشاورزي دامپروري ولي عص‎ ‎ – "Sherḵat-e Tʿāūnī Kehāvarzī Dāmparūrī Valīʿaṣ") is an agricultural cooperative and village in Shusef Rural District, Shusef District, Nehbandan County, South Khorasan Province, Iran.  At the 2006 census, its population was 62, in 15 families. A winemaking cooperative is an agricultural cooperative which is involved in winemaking, and which in similarity to other cooperatives is owned by its members.  The members in a winemaking cooperative are usually vineyard owners, who deliver grapes to the cooperative, which is involved in production of wine from the grapes and the subsequent marketing activities. Shaban Agricultural Cooperative (Persian: تعاوني كشاورزي سوم شعبان‎ ‎ – "Tʿāvanī Keshāvarzī-ye Sūm Shaʿbān") is a village and agricultural cooperative in Arzuiyeh Rural District, in the Central District of Arzuiyeh County, Kerman Province, Iran.  At the 2006 census, its population was 64, in 16 families. Agricultural Cooperative university ' is a private university located in Goyang City, Gyeonggi province, South Korea.  It is operated by the National Agricultural Cooperative Federation, also known as Nonghyup (농협). Arden Hills is a city in Ramsey County, Minnesota, United States.  The population was 9,552 at the 2010 census.  Bethel University and Seminary is located in the city of Arden Hills.  Also, the campus of University of Northwestern – St. Paul straddles the Arden Hills – Roseville border.  The headquarters of Land O'Lakes and Catholic United Financial, a fraternal benefit society, are located there as well.
Answer: dairy