This site offers images from the tropics e.g. pictures of soil profiles: aridisol in Peru, vertisol in Kenya, alfisol in Nigeria, mollisol in Thailand, spodosol in Brazil, laterite outcrops etc.
提供大量热带土壤的剖面图,如:秘鲁的旱土、肯尼亚的变性土、尼日利亚的淋溶土、国的软土、巴西的灰土、红土岩层等。