Soila (complete medium for life)

Soila (complete medium for life)

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  HAFIZ MUHAMMA D WASEEM LAHORE PAKISTA N
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  UNIVESITY OF EDUCATION LAHOREPAKISTAN
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  SOIL-----ECOSYSTEM
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  COMMON DEFINITION Soil is EARTH or DIRT
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  SOIL Mixture of organicmatter Product of several factors
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  SOIL STUDY/SCIENCE  Edaphology and Pedology
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  SOIL TYPES • ClaySoil…… • Sandy Soil.... • Silty Soil. ... • Peaty Soil.... • Chalky Soil. ... • Loamy Soil….
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  COMPOSITION A typical soilis 1. about 50% solids (45% mineral and 5% organic matter), and 2. 50% voids (or pores) of which half is occupied by water and half by gas
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  Influence of SoilTexture Separates on Some Properties of Soils Property/behavior Sand Silt Clay Water-holding capacity Low Medium to high High Aeration Good Medium Poor Drainage rate High Slow to medium Very slow Soil organic matter level Low Medium to high High to medium Decomposition of organic matter Rapid Medium Slow Warm-up in spring Rapid Moderate Slow Compactability Low Medium High Susceptibility to wind erosion Moderate (High if fine sand) High Low
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  FACTORS 1. TOPOGRAPHY 2. FERTILITY 3.TIME 4. ORGANISMS 5. FORMATION
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  LAYERS OF SOIL layerscalled horizons sequence of layers is the soil profile  main layers are topsoil, subsoil and the parent rock
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  SOIL USES/FUNCTIONS • Agriculture •Building • Pottery • Medicine • Beauty Products
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  IN OTHER WORDS •Food and other biomass production. • Environmental Interaction. • Biological habitat and gene pool. • Source of raw materials. • Physical and cultural heritage. • Platform for man-made structures.
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  ROLE OF SOILIN OUR LIFE • Soil filters our water • Replenishes vital nutrients to our forests and crops. • It helps to regulate the temperature of the Earth and • Maintain many of the primary greenhouse gases.
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  SOIL AND BIOTA
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  SOIL IS IMPORTANTFOR LIFE ON EARTH Richest ecosystem Because soil holds water and nutrients, it is an ideal place for plants to grow.
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  REFERENCES • Cornell, RochelleM. & Schwertmann, Udo (2003). The iron oxides: structure, properties, reactions, occurrences and uses (PDF) (2nd ed.). Weinheim, Germany: Wiley-VCH. Archived from the original (PDF) on 26 December 2017. Retrieved 25 December 2017. • Håkansson, Inge & Lipiec, Jerzy (2000). "A review of the usefulness of relative bulk density values in studies of soil structure and compaction" (PDF). Soil and Tillage Research. 53 (2): 71–85. doi:10.1016/S0167-1987(99)00095-1. Retrieved 31 December 2017. • Donahue, Miller & Shickluna 1977, pp. 59–61. • Mäder, Paul; Fließbach, Andreas; Dubois, David; Gunst, Lucie; Fried, Padruot & Liggli, Urs (2002). "Soil fertility and biodiversity in organic farming" (PDF). Science. 296(1694): 1694–97. Bibcode:2002Sci...296.1694M.