Multiple cropping area estimate by region and country.

This table summarizes published multiple cropping area estimates for selected countries and regions. Multiple cropping refers to any agricultural systems in which multiple crops are combined and includes certain types of agroforestry, cover cropping, crop rotations, double and triple cropping and intercropping. The area estimates in the literature are based on national survey statistics, expert opinions, suitability analysis, remote sensing, self-reported cropping practices and other methods. Area estimates are provided as physical area in hectares and million hectares, and as percentage of total cropland, crop area, arable land or agricultural land.本表格汇总了针对部分国家及地区已发表的复种（multiple cropping）面积估算结果。复种指将多种作物组合种植的各类农业生产体系，涵盖部分类型的农林业（agroforestry）、覆盖种植（cover cropping）、作物轮作（crop rotations）、双季与三季种植以及间作（intercropping）。现有文献中的面积估算数据基于全国调查统计、专家意见、适宜性分析、遥感（remote sensing）、自主报告的种植实践及其他方法获取。本表格所提供的面积估算结果以公顷、百万公顷为物理面积单位，同时标注其占总耕地、作物种植面积、可耕地或农用地的百分比。