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What Limits Agricultural Intensification in Cambodia? The Role of Emigration, Agricultural Extension Services and Credit Constraints

Policy Papers & Briefs
december, 2011
Cambodia

This paper attempts to define the factors which determine emigration and rice doublecropping, i.e. rice cultivation on the same plot twice per year, by rural households in Cambodia, and investigates whether these decisions influence each other using data from a two-period panel survey of 231 households in three provinces in rural Cambodia. In the analysis, we take into account possible correlation between these decisions (through estimating a seemingly unrelated bivariate probit model) and unobserved heterogeneity among farmers (through estimating a random-effects probit model).

An agent-based model of agricultural innovation, land-cover change and household inequality: the transition from swidden cultivation to rubber plantations in Laos PDR

Journal Articles & Books
december, 2011
Laos

This article examines the transition from shifting cultivation to rubber production for a study area in northern Laos PDR using an agent-based model of land-cover change. A primary objective of the model was to assess changes in household-level inequality with the transition from shifting cultivation to rubber adoption. A secondary objective was to develop explanations for the rate of rubber adoption in the study area.

Minimising the harm to biodiversity of producing more food globally

Journal Articles & Books
december, 2011

Should farming and conservation policies aim broadly to separate land for nature and land for production (land sparing) or integrate production and conservation on the same land (wildlife-friendly farming)? Most studies that try to address this question suffer from flaws in sampling design, inappropriate metrics, and/or failure to measure biodiversity baselines. We discuss how these failings can be addressed, and what existing information tells us about the key debates on this topic. The evidence available suggests that trade-offs between biodiversity and yield are prevalent.

Economic Integration, Rural Hardship, and Conservation on Guatemala's Agricultural Frontier

Journal Articles & Books
december, 2011
Guatemala
Central America
South America

Despite decades of attention by conservationists, deforestation remains a critical problem in Latin America, particularly in agricultural frontiers like the Amazon and the lowlands of Central America. The limited impact of conservation initiatives in such regions stems partly from a poor understanding of the socioeconomic and land use dynamics that typify frontiers. Moreover, conservation organizations tend to disregard the economic and policy factors at various scales that contribute to deforestation pressures in developing countries.

Using the CENTURY model to assess the impact of land reclamation and management practices in oasis agriculture on the dynamics of soil organic carbon in the arid region of North-western China

Journal Articles & Books
december, 2011
China

Large-scale reclamation of arid land in North-western China over the past 50 years has converted the natural desert landscape into anthropogenic oasis, particularly in the lower part of watersheds. Drastic human activities may have caused the change of soil organic carbon (SOC) in anthropogenic oasis. This study employs the CENTURY model (Version 4.0) to investigate the effects of land reclamation and management practices in oasis agriculture on the dynamic of SOC at the lower part of Sangong river watershed, a typical anthropogenic oasis reclaimed at 50 years ago.

Landscape futures analysis: Assessing the impacts of environmental targets under alternative spatial policy options and future scenarios

Journal Articles & Books
december, 2011
Australia

Environmental targets are often used in planning for sustainable agricultural landscapes but their impacts are rarely known. In this paper we introduce landscape futures analysis as a method which combines linear programming optimisation with scenario analysis in quantifying the environmental, economic, and social impacts associated with achieving environmental targets, on a landscape scale. We applied the technique in the Lower Murray in southern Australia.

Spatial fields' dispersion as a farmer strategy to reduce agro-climatic risk at the household level in pearl millet-based systems in the Sahel: A modeling perspective

Journal Articles & Books
december, 2011

The rainfall pattern in the Sahel is very erratic with a high spatial variability. We tested the often reported hypothesis that the dispersion of farmers' fields around the village territory helps mitigate agro-climatic risk by increasing yield stability from year to year. We also wished to evaluate whether this strategy had an effect on the yield disparity among households in a village. Based on a network of approximately 60 rain gauges spread over 500km² in the Fakara region (Southwest Niger), daily rainfall was interpolated at 300m×300m resolution over a 12-year period.

Land use/cover dynamics and their effects in the Gerado catchment, northeastern Ethiopia

Journal Articles & Books
december, 2011
Ethiopia

This paper analyses the land use/cover dynamics of land degradation through the interpretation of aerial photographs (1958 and 1980) and 2006 SPOT-5 satellite image of the Gerado catchment. Other, non-visual data were gathered from personal interview and focus group discussions conducted in 2010 and 2011 with local elders, farmers and development (agricultural extension) agents. The results identified the presence of cultivated and rural settlement land, shrubland, woodland, bare land, grassland, urban built up area and forest.

Crop diversification in Thailand: Status, determinants, and effects on income and use of inputs

Journal Articles & Books
december, 2011
Thailand

Following the national policy, the Department of Agriculture of Thailand has implemented a crop diversification program in several provinces of the country. This study, which was conducted in Nakhon Pathom Province, analyzed the extent of crop diversification and its determinants using primary information collected from 245 farm households using a structured questionnaire, and from selected farmer leaders and agricultural development officials. The study also assessed the effects of crop diversification on income and the inputs used.

Review of Quantitative Tools for Assessing the Diffuse Pollution Response to Farmer Adaptations and Mitigation Methods Under Climate Change

Journal Articles & Books
december, 2011

In an era of global climate change, the agricultural sector faces the challenge of increasing the production of safe and nutritious food supplies to meet a growing world population while safeguarding the environment. Farmers will adapt their agricultural practices to a changing climate to safeguard against loss of production and to take advantage of any positive climatic conditions.

Talking Sustainability: Identification and Division in an Iowa Community

Journal Articles & Books
december, 2011

This study investigates how sustainability and its inherent values figure into farmers' discourse, i.e., how farmers and members of farming communities talk about sustainability. We conducted qualitative interviews of various individuals in a single Iowa community to determine whether the visions guiding their land management choices resembled at all the ideals of a sustainable agriculture. Using Kenneth Burke's concepts of identification and division, we rhetorically analyzed the interview transcripts.

Is Oregon's land use planning program conserving forest and farm land? A review of the evidence

Journal Articles & Books
december, 2011

Planners have long been interested in understanding ways in which land use planning approaches play out on the ground and planning scholars have approached the task of evaluating such effects using a variety of methods. Oregon, in particular, has been the focus of numerous studies owing to its early-adopted and widely recognized statewide approach to farm and forest land protection and recent experiment with relaxation of that approach in 2004 with the passage of ballot Measure 37.