HSC 156 Study Guide - Final Guide: Urban Sprawl, Intensive Farming, Soil Salinity
Document Summary
Low permeability (top soil) is better; giant sponge when it rains holds water for a couple of days & available to roots. The best type of soil for growing crops is a combination of what three things, and what is the combination called: loam. What are the root causes of erosion, and what are the immediate causes: root causes. Redistribution of the products of geologic weathering & is part of both soil formation & soil loss. Salinization- high evaporation, poor drainage & heavy irrigation can add salts to the soil: waterlogging- conversion of farmland to urban sprawl. What is blue baby syndrome: methemoglobinemia- the adding of nitrates to drinking water by fertilizer. What is the difference between subsistence and industrialized agriculture: subsistence. Farmers of the developing world that use traditional agriculture methods for raising plants, animals, & food. Requires either large amounts of land or large amounts of human or animal labor.
