作者: Paul E Rasmussen , Keith WT Goulding , James R Brown , Peter R Grace , H Henry Janzen
DOI: 10.1126/SCIENCE.282.5390.893
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摘要: Long-term agroecosystem experiments can be defined as large-scale field more than 20 years old that study crop production, nutrient cycling, and environmental impacts of agriculture. They provide a resource for evaluating biological, biogeochemical, dimensions agricultural sustainability; predicting future global changes; validating model competence performance. A systematic assessment is needed to determine the merits all known identify any may exist in tropical subtropical environments. The establishment an international network coordinate data collection link sites would facilitate precise prediction sustainability change.