Productivity of agriculture : United States, 1870-1958 /

Literature cited: p. 38-39.

The 1965 Far East, Communist China, Oceania agricultural situation /

Cover title.

The Africa and West Asia agricultural situation : 1968 midyear review /

"The report updates a more comprehensive report published in April 1968: The Africa and West Asia agricultural situation--review of 1967 and outlook for 1968, ERS-Foreign 221."

The Agricultural situation in Africa and West Asia : review of 1973 and outlook for 1974 /

"One of six regional supplements to the World Agricultural Situation, issued in December 1973."

The Agricultural situation in Communist areas : midyear review.

Caption title.

The Agricultural situation in Communist areas : review of 1972 and outlook for 1973.

Prepared in the Communist Countries Branch.

The Agricultural situation in the People's Republic of China and other Asian Communist countries : review of 1973 and outlook for 1974 /

Cover title.

The Agricultural situation in the Soviet Union : review of 1973 and outlook for 1974 /

Mode of access: Internet.

The Agricultural situation in Western Europe : review of 1969 and outlook for 1970 /

Cover title.

The Far East and Oceania agricultural situation : 1968 midyear review /

"This report updates a more comprehensive report published in April 1968: The Far East and Oceania agricultural situation--review of 1967 and outlook for 1968, ERS-Foreign 223."

Western Hemisphere agricultural situation : 1968 midyear review /

Updates a more comprehensive report published in April, 1968: The Western Hemisphere agricultural situation--review of 1967 and outllook for 1968, ERS-Foreign, 222.

Increasing productivity of multipurpose tree species : a blueprint for action : IUFRO Planning Workshop for Asia, 16-28 July 1984, Kandy, Sri Lanka /

At head of title: International Union of Forestry Research Organizations; Union Internationale des Instituts de Recherches Forestieres; Internationaler Verband Forstlicher Forschungsanstalten.

A Review of U.S. competitiveness in agricultural trade.

Item 1070-M

Impacts of technology on U.S. cropland and rangeland productivity.

Item 1070-M (v. 1)

The Application of Geographic Information Systems to climate change & land evaluation : a study of the effects of climate change upon crop productivity in a sub-tropical environment

This research investigates the contribution that Geographic Information Systems (GIS) can make to the land suitability process used to determine the effects of a climate change scenario. The research is intended to redress the severe under representation of Developing countries within the literature examining the impacts of climatic change upon crop productivity. The methodology adopts some of the Intergovernmental Panel on Climate Change (IPCC) estimates for regional climate variations, based upon General Circulation Model predictions (GCMs) and applies them to a baseline climate for Bangladesh. Utilising the United Nations Food & Agricultural Organisation's Agro-ecological Zones land suitability methodology and crop yield model, the effects of the scenario upon agricultural productivity on 14 crops are determined. A Geographic Information System (IDRISI) is adopted in order to facilitate the methodology, in conjunction with a specially designed spreadsheet, used to determine the yield and suitability rating for each crop. A simple optimisation routine using the GIS is incorporated to provide an indication of the 'maximum theoretical' yield available to the country, should the most calorifically significant crops be cultivated on each land unit both before and after the climate change scenario. This routine will provide an estimate of the theoretical population supporting capacity of the country, both now and in the future, to assist with planning strategies and research. The research evaluates the utility of this alternative GIS based methodology for the land evaluation process and determines the relative changes in crop yields that may result from changes in temperature, photosynthesis and flooding hazard frequency. In summary, the combination of a GIS and a spreadsheet was successful, the yield prediction model indicates that the application of the climate change scenario will have a deleterious effect upon the yields of the study crops. Any yield reductions will have severe implications for agricultural practices. The optimisation routine suggests that the 'theoretical maximum' population supporting capacity is well in excess of current and future population figures. If this agricultural potential could be realised however, it may provide some amelioration from the effects of climate change.