首页 | 本学科首页   官方微博 | 高级检索  
     检索      


Soils, agriculture, and society in precontact Hawai'i
Authors:Vitousek P M  Ladefoged T N  Kirch P V  Hartshorn A S  Graves M W  Hotchkiss S C  Tuljapurkar S  Chadwick O A
Institution:Department of Biological Sciences, Stanford University, Stanford, CA 94305, USA. vitousek@stanford.edu
Abstract:Before European contact, Hawai'i supported large human populations in complex societies that were based on multiple pathways of intensive agriculture. We show that soils within a long-abandoned 60-square-kilometer dryland agricultural complex are substantially richer in bases and phosphorus than are those just outside it, and that this enrichment predated the establishment of intensive agriculture. Climate and soil fertility combined to constrain large dryland agricultural systems and the societies they supported to well-defined portions of just the younger islands within the Hawaiian archipelago; societies on the older islands were based on irrigated wetland agriculture. Similar processes may have influenced the dynamics of agricultural intensification across the tropics.
Keywords:
本文献已被 PubMed 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号