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Theories of technological change in agriculture
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agricultural agricultural research Argentina average Brazil breeding programmes cent of total CIMMYT conventional plant breeding corn countries included country studies cultivation demand for maize developed market economies developing countries development and diffusion Development Centre domestic EMBRAPA emerging biotechnologies exports food and agriculture four countries genetic germplasm global hectares hybrid seed IARCs improved seed improved varieties increased Indonesia industrialised industrialised countries intellectual property rights levels livestock livestock feed maize production maize research maize seed maize yield major Mexico million MNCs national maize research Nitrogen Fixation OECD open-pollinated varieties particularly photosynthetic plant breeding potential private sector public and private public sector rate of maize recent regions research and technology research effort research programmes role seeds firms seeds industry seeds production share of total sorghum t/ha techniques technological change technology development Tekfai Thailand tion total cereals total maize total utilisation tropical United USSR wheat World Maize Facts