PLAN341 Lecture Notes - Lecture 12: Sustainable Organic Integrated Livelihoods, Erodability, Management System
27 May 2016
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Lecture 12: soil erosion, land use, and stream sedimentation ch12. Problems: productivity increases with less erosion because erosion makes materials go (c n p) Graph : p| _t, relationship is curved and decreasing conservation measures are more important than adding more fertilizers. Most prominent geomorphic agents on the globe. We have altered many processes (geomorphic, hydrologic, etc. Losing soil losing agricultural field losing $ Rills can form into gullies, landscape decreasing in accordance to these processes. Algae, bacteria, soils chem/phys/biological processes letting particles stuck together in river systems. Universal soil loss equation usle - predicts long term average annual rate of erosion on field slope based on rainfall pattern, soil type, topography, crop system, management practices. Only predicts the amount of soil loss that results from sheet or rill erosion on a single slope and does not account for additional soil losses that might occur from gully, wind, or tillage erosion.
