St. Helens‚ a stratovolcano in western Washington‚ erupted. The eruption scoured the slopes of the volcano removing vegetation and soil from the vicinity of the mountain. 32 years after the eruption‚ vegetation has returned to the mountain. The author’s main interest in this field is the methods by which vascular plants re-establish themselves after cataclysmic‚ soil-removing volcanic eruptions‚ and if some plants are better suited than others to re-establishing on volcanic tephra and other eruptive
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Pioneer species : first colonisers a. Characteristics: i. Special adaptations that enable to survive on dry and nutrient-poor soil. ii. Hardy plants which usually have dense root systems to bind sand particles and hold water and humus. iii. Short life cycle iv. When die‚ their remains add to the humus content of the soil. v. Modify the environment 3. Successor species b. Characteristics: vi. Plants grow bigger vii
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Occurrence of Arbuscular Mycorrhizal Spores in Soils of Some Legumes and Their Response to Varying Concentration of Phosphorus Application Abstract An experiment was undertaken to investigate the occurrence of Arbuscular Mycorrhizal (AM) fungi in the soil of five leguminous plants: Cajanus cajan‚ Centrosema pascurum‚ Crotolatia ochroleuca‚ Lablab purpurens and Mucuna pruriens. The effects of soil treatments with varying phosphorus concentrations‚ on the population of AM spores under these legumes
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throughout the upcoming years to improve the condition of my land. While thinking of these ideas to help improve my property I went back to the things I learned in the soil and agriculture chapters in my wonderful ecology class. I remembered how important finding out the pH of soil was. With this information one of my measures is to test the soil for the pH. By finding this out it can be adjusted‚ show if there is good availability to the plants foods‚ and is an important indicator of air pollutants. A second
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Effects on Soil The soil has abundant amount of various metals and minerals. When these metals come in contact with acid rain there can be some harmful chemical reactions. These reactions can lead to soil erosion. Acid rains are known to reduce the fertility of the soil‚ leaving the land barren. Harmful acids can also reduce the amount of soil micro organisms which perform important job of breaking down the dead and decayed plants and other beings. Rainfall: Acid soils are most often found in areas
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8‚ 2013 Soil Analysis Lab Report Intro: Soil is produced over hundreds of years through the weathering of rocks and the decomposition of organic material. Soil contains nutrients that are taken from decomposed animals and plants which turn to detritus. Nutrients such as nitrogen are added to the soil in these ways by organisms such as nitrogen fixing bacteria. Soil is important because it is the fuel to the plants that we need in order to survive and for all species to survive. Soil absorbs nutrients
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Chapter 15 Outline * Soil is the relatively thin surface layer of Earth’s crust consisting of minerals and organic matter modified by natural actions like… * Weather * Wind * Water * Organisms * Soil is formed from parent material‚ rock that is slowly broken down or fragmented into smaller particles by… * Weathering Processes Biological * Chemical * Physical * Topography‚ a region’s surface features such as the presence or absence
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TITLE CAN COMMERCIAL STOCK FARMING IN THE KAROO BE PERFORMED IN AN ENVIRONMENTALLY SUSTAINABLE WAY INCORPORATING THE REHABILITATION OF DEGRADED FARMLAND? Contents Description Page Contents 2 Abstract 3 Experiment 1 : Krommelboog Farm (soil quality when using Holistic Management) 4 • Aim 4 • Hypothesis 4 • Method 4 • Results 4/5 Conclusion 5 Experiment 2 : Krommelboog Farm (water movement) 6 • Aim 6 • Water Table 6 • Conclusion 6 The process of herding and shepherding on Krommelboog
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Graph 8)‚ different soil substrate and the decomposition of organic matter. As can be seen from Graph 8‚ the soil pH increased with a decrease in the slope of the ground. In Quadrat 1‚ the soil had a pH of 7.5 due to having a higher soil elevation of -8° in comparison to Quadrat 2‚ 3 and 4‚ in which the slope of the ground was -2°‚ -2° and -1°‚ respectively and the pH was 9 within each quadrat. This makes Quadrat 1 more prone to acidification‚ as it receives more acid rain than soils in lower elevations
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RESOURCE & DEVELOPMENT Classification of Resources Basis of Classification Origin Exhaustibility Ownerhip Class Biotic Abiotic Renewable Non-renewable Individual Community National International Example Flora and fauna Minerals‚ Soil‚ Forest‚ Water‚ Wind Fossil Fuel‚ Metals Private land‚ orchard Village Pond‚ Park River‚ Mines‚ International Ocean Territory starts after 200 km of national boundary Stage of Development Potential resources are yet to Potential wind energy source in be exploited
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