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| Li-juan, Tang; Lei, Lei; Ling, Cao. |
| Variation of cultivated land quality in 10 major cities and its driving forces are introduced in recent 10 years. And economic development and population growth are the common driving forces for the reduction of cultivated land in coastal cities. Among them, economic development is the main driving force. Taking Huludao City as an example, driving factors of cultivated land variation in Huludao City are studied by Principal Component Analysis according to the relevant statistical data in the year 1998-2007. Result shows that in recent 10 years, total cultivated land area has increased in Huludao City, especially in the years 1998-2002. Driving force of cultivated land variation in Huludao City can be summarized as economic growth, population growth and... |
| Tipo: Journal Article |
Palavras-chave: Coastal city; Cultivated land; Quantity variation; Driving force; Principal component analysis; China; Agribusiness. |
| Ano: 2010 |
URL: http://purl.umn.edu/93242 |
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| Lei, Lei; Rickard, Bradley J.; Balagtas, Joseph Valdes; Krissoff, Barry. |
| Current U.S. farm programs make payments to farmers based in part on historical base acres planted in particular program crops such as corn, soybeans, cotton, wheat and soybeans. Eligibility for payments includes regulations on the crops allowed to be grown on base acres, and there are restrictions on planting horticultural crops on such base acres. The fruits and planting restriction on base acres has potentially influenced the number of acres planted to fruits and vegetables over the past two decades. This research carefully examines the effects of planting restrictions applied to vegetables and program crops, using county-level data in the United States in 1982, 1987, 1992 and 1997. The paper employs the difference-indifference (DiD) approach to... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Crop Production/Industries; Land Economics/Use. |
| Ano: 2011 |
URL: http://purl.umn.edu/103992 |
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