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2. Mapping center pivot irrigation fields in south carolina with google earth engine and the national agricultural imagery program
- Collection:
- Agricultural Communications Documentation Center (ACDC)
- Contributers:
- Keshwani, Jenny (author)
- Format:
- Journal article
- Publication Date:
- 2020
- Published:
- United States: Clemson University Press
- Location:
- Agricultural Communications Documentation Center, Funk Library, University of Illinois Box: 204 Document Number: D12469
- Journal Title:
- Journal of South Carolina Water Resources
- Journal Title Details:
- Volume 7, Issue 1
- Notes:
- 7pgs, Aerial images taken during the growing seasons of 2009, 2011, 2013, 2015, and 2017 were visually inspected for evidence of irrigation. Center pivot irrigation was identified by the characteristic shape of the spans and the curved tracks left by the wheels. The author manually delineated a polygon over each agricultural area where signs of irrigation infrastructure were observed. The result is a map of 2,689 polygons covering 146,662 acres in South Carolina. Compared with the United States Department of Agriculture 2017 Census of Agriculture, the sampling results account for over 69% of total irrigated area and over 98% of area irrigated solely by center pivots. Most center pivots covered from 25 to 75 acres, while the largest center pivot extended over 300 acres. These results are an important contribution to the quantification of water use in South Carolina.
3. The impacts of land fragmentation on irrigation collective action: Empirical test of the social-ecological system framework in China
- Collection:
- Agricultural Communications Documentation Center (ACDC)
- Contributers:
- Wang, Yahua (author), Zang, Liangzhen (author), and Araral, Eduardo (author)
- Format:
- Journal article
- Publication Date:
- 2020-07-20
- Published:
- Internatioanl: Elsevier
- Location:
- Agricultural Communications Documentation Center, Funk Library, University of Illinois Box: 201 Document Number: D11857
- Journal Title:
- Journal of Rural Studies
- Notes:
- 11 pages, via online journal, Land fragmentation is an interesting physical character in some developing countries, especially China. This study aims to discover the direct and mediated effects of land fragmentation on collective action in China based on an empirical test and the social-ecological system framework. We introduce three innovations to the literature on collective action in the commons. First, we focus on the mechanism of land fragmentation on collective action in the commons, which has been largely ignored in the literature. Second, building on the social-ecological system framework, we use structural equation modeling, which is robust to endogeneity and latent variable problems. Third, we use original survey data from 3895 households and 284 villages from 17 provinces/regions in China, a critical case because China has some of the most fragmented farmland use in the world. We find that land fragmentation has a direct negative effect on irrigation collective action. And besides the direct negative effect, there are four indirect factors: dependency on farming, irrigation rule-making, economic pressure and land circulation. Of these, the first three have a negative effect, and the last one, a positive effect. Our findings add to the theoretical literature on collective action in the commons and suggest new policy handles for more efficient land and labor markets in China.
4. Working toward sustainable agricultural intensification in the Red River Delta of Vietnam
- Collection:
- Agricultural Communications Documentation Center (ACDC)
- Contributers:
- Morton, Lois Wright (author)
- Format:
- Article
- Publication Date:
- 2020-09-05
- Published:
- USA: Soil and Water Conservation Society
- Location:
- Agricultural Communications Documentation Center, Funk Library, University of Illinois Box: 201 Document Number: D11864
- Journal Title:
- Journal of Soil and Water Conservation
- Journal Title Details:
- Vol. 75
- Notes:
- 8 pages, via online journal, Dense networks of rivers, canals, ditches, dikes, sluice gates, and compartmented fields have enabled the farms of the Red River Delta to produce 18% of Vietnam's rice (Oryza sativa) crop (figure 1), 26% of the country's vegetable crops, and 20% of capture and farmed aquaculture (Redfern et al. 2012). Agriculture in this fertile delta was transformed in the 11th and 13th century AD by large-scale hydraulic projects to protect the delta from flooding and saltwater intrusion, and provide field drainage during the wet season and crop irrigation in the dry season (Tinh 1999). The 20th century brought advancements in agricultural science globally—new crops and livestock genetics, inorganic fertilizers, mechanization, and pesticides that could double and triple food production per unit of land. It was the diesel pump combined with post-Vietnam War agricultural collectivization from 1975 to 1988 that brought the Green Revolution to the Red River Delta.