SCSC 301 Study Guide - Midterm Guide: Gelisol, British Home Stores, Humus

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Opens channels due to past roots - increases filtration. No till means till only at the time of planting. Holds/stores water for a longer period of time. Add organic matter increases aggregation increases filtration. The amount of water vapor that would be lost from a densely vegetated soil if soil water content were continuously at an optimal level. Temperature: as temperature increases pet increases. Relative humidity: as humidity increases pet decreases. Cloud cover (amount of radiant energy: as cloud cover increases pet decreases. Pet= 0. 65 * open pan evaporation: as wind speed increases pet decreases. Caused by solute in the soil solution; more solute (salt), lower osmotic potential (higher osmotic tension or suction) Higher amount of salt the more amount of water needed to get the same production. For plants to remove water from the soil. Plants must overcome the tension (energy) with which water is held in the soil.

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