f Propertybehavior Sandy loamy Clayey Water holding capacity Low Med high High

F propertybehavior sandy loamy clayey water holding

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f Property/behavior Sandy loamy Clayey Water-holding capacity Low Med-high High Plant available water Low High Medium Root penetration High High Low Surface crusting Low High Moderate Aeration High High Low Drainage Excessive Slow-med. Very slow Warm-up in spring Rapid Moderate Slow Compactability Low Medium High Erodibility Med-low High Low Shrink-swell potential Very low Low Mod-high Pollutant leaching High Medium Low Nutrient storage Poor Med-high High Acidity buffer Low Medium High
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10/1/2019 5 Soil Structure -Aggregation of sand, silt, and clay particles into identifiable shapes: peds. -Particles are stuck together by roots, fungal hyphae, and weak cements, including organic compounds, clays, carbonates, Fe oxides, and silica. -Peds are naturally occurring aggregates, separated from one another by planes of weakness that act as pathways for the movement of soil solution, soil atmosphere and roots. Particle arrangement 1. Why is aggregation important? 2. What destroys soil structure?
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10/1/2019 6 Structure shapes granular angular blocky granular columnar subangular blocky Prismatic Photo by Chris Amrhein Platy No structure? Massive if cohesive Single grain if not cohesive Soil structure includes: grade, size, shape moderate, fine, granular Wedge
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10/1/2019 7 Massive is a structureless condition indicative of low pore space, root penetration, & water infiltration. Can result in poor drainage and high runoff Structureless Conditions Soil Color Munsell notation
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10/1/2019 8 Soil Survey Manual, Soil Survey Staff 1993 Principal hues R ed Y ellow G reen B lue P urple Intermediate hues YR GY BG PB RP
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