Nitrogen Cycling in Ecosystems of Latin America and the Caribbean

Abstract

Plant assimilation and nitrogen cycling.- Microbiological regulation of the biogeochemical nitrogen cycle.- Simulation of nitrogen in agro-ecosystems: Criteria for model selection and use.- Nitrogen supply and crop yield: The global scene.- The role of the atmosphere in nitrogen cycling.- Regional nitrogen budgets: Approaches and problems.- Some priority research areas in nitrogen studies.- Nitrogen in shifting cultivation systems of Latin America.- Nitrogen distribution in several traditional agro-ecosystems in the humid tropical lowlands of south-eastern Mexico.- Nitrogen distribution in hybrid and local corn varieties and its possible relationship to a declining soil nitrogen pool under shifting agriculture at Indian Church, Belize.- 15N-urea transport and transformation in two deforested Amazonian soils under laboratory conditions.- Nitrogen cycling in sugarcane.- Nitrogen gains and losses in sugarcane (Saccharum sp.) agro-ecosystems on the coast of Peru.- Potential growth of alfalfa (Medicago sativa L.) in the desert of Southern Peru and its response to high NPK fertilization.- Crop utilization and fixation of added ammonium in soils of the West Indies.- Distribution of 15N fertilizer in field-lysimeters sown with garlic (Allium sativum) and foxtail millet (Setaria italica).- Nitrogen cycling in a 15N-fertilized bean (Phaseolus vulgaris L.) crop.- Nitrogen cycling in a flooded-soil ecosystem planted to rice (Oryza sativa L.).- The nitrogen balance of vegetable crops irrigated with untreated effluent.- Research into the Rhizobium/Leguminosae symbiosis in Latin America.- Nitrogen cycling in coffee plantations.- Nitrogen cycle of tropical perennial crops under shade trees: I. Coffee.- Nitrogen cycle of tropical perennial crops under shade trees: II. Cacao.- Dynamics of nitrogen in a shaded cacao plantation.- Nitrogen fixation in a Mexican coffee plantation.- Nitrogen cycling in South American savannas.- Nitrogen balance in the Trachypogon grasslands of Central Venezuela.- Net primary productivity and nitrogen and carbon distribution in two xerophytic communities of central-west Argentina.- The nitrogen cycle in a 'Terra Firme' rainforest on oxisol in the Amazon territory of Venezuela.- Nitrogen cycling in the seasonally dry forest zone of Belize, Central America.- Seasonal dynamics of nitrogen cycling for a Prosopis woodland in the Sonoran Desert.- Litterfall and nitrogen turnover in an Amazonian blackwater inundation forest.- Nitrogen in litterfall and precipitation and its release during litter decomposition in the Chilean piedmont matorral.- Regional gains and losses of nitrogen in the Amazon basin.- Eutrophy in Lake Aculeo, Chile.- Work group reports Shifting cultivation and traditional agriculture.- Sugarcane.- Cereal and grain crops.- Coffee and cacao plantations.- Savannas and shrublands.- Latin American forests.- Wetlands (including rice) and aquatic systems.- List of participants.