Distribution of Soil Nutrients and Ancient Agriculture on Young Volcanic Soils of Ta‘ū, American Samoa

Agriculture & Biology

• American Samoa 100%
• volcanic soils 94%
• soil nutrients 61%
• agriculture 44%
• soil 30%
• exchangeable calcium 20%
• Hawaii (island) 19%
• soil fertility 18%
• rain 15%
• soil biochemistry 12%
• tubers 11%
• arboriculture 11%
• vegetation 9%
• economic plants 9%
• soil chemistry 9%
• base saturation 9%
• traditional farming 9%
• Pacific Ocean Islands 8%
• total phosphorus 8%
• agroforestry 7%
• land use 6%
• cropping systems 6%
• highlands 6%
• phosphorus 4%
• economics 4%
• crops 3%
• sampling 2%

Earth & Environmental Sciences

• volcanic soil 83%
• soil nutrient 64%
• agriculture 43%
• young 41%
• soil 25%
• agricultural practice 19%
• soil fertility 19%
• tuber 16%
• rainfall 11%
• arboriculture 10%
• calcium 9%
• traditional agriculture 9%
• ecological adaptation 9%
• soil chemistry 7%
• vegetation 7%
• agroforestry 7%
• economics 6%
• biochemistry 6%
• cropping practice 5%
• alignment 5%
• transect 5%
• phosphorus 4%
• crop 4%
• saturation 4%
• substrate 4%
• land use 4%
• indicator 3%
• parameter 2%