PPT-Soil Organic Matter Unit: Soil Science Lesson 3

Objectives Define soil organic matter Explain the role of inherent factors affecting soil organic matter Explain the five soil organic matter management practices Explain how soil organic matter relates to soil function. Lesson two: Soils. Time to observe and learn. You will examine three types of soil:. Clay. Sand. Loam. You will need to read and follow the instructions carefully. After examining the soil types:. What are some ways we can classify soils?. Soil Management . and Fertility. High Tunnel. Fruit and Vegetable Production. Objectives. Recall soil’s physical and chemical properties and how they affect nutrient management. . Calculate the fertilizer needs in a high tunnel based on soil test recommendations. . 2004. ) argued that depolymerization and subsequent plant-microbial competition for N-containing organic monomers regulates N availability. Building upon this model, . we present a new conceptual framework arguing that along with depolymerization, mineral-organic associations may proximally regulate the provisioning of bioavailable organic N monomers especially in the rhizosphere. . Care for these RESOURCES. Starting with The Basics!. What is soil. Naturally deposited MIXTURE of:. R. ock particles. “Organic” materials. Air. Water. Soil Components. Soil Components. Air. = Mixture of atmospheric gases. Objectives. Define: ammonification, ammonium, bulk density, . denitrification. , immobilization, leaching, mineralization, nitrate-N, nitrification, soil nitrogen fixation, volatilization. List and describe inherent factors that affect soil nitrogen. How do you start describing the soil?. What do you see. ?. What is different from top to bottom?. How deep do roots go?. Soil Profile Descriptions. Soil Profile. - A vertical section of the soil extending . Time to observe and learn. You will examine three types of soil:. Clay. Sand. Loam. You will need to read and follow the instructions carefully. After examining the soil types:. What are some ways we can classify soils?. Objectives. Define: acidity, alkalinity, buffering capacity, soil pH. List and describe inherent factors that affect soil pH. Describe how to manage soil pH. Describe how soil pH affects soil function. Gravel – larger than 2 mm. Sand – 0.05 to 2 mm. Silt – 0.002 to 0.05 mm. Clay – smaller than 0.002 mm. soil. Renewable resource. Renews . very. slowly. 1 cm takes 15 years to form. soil. Importance. s. oil test interpretation. Weston Miller, . OSU Extension Service. Preview of presentation. Safety precautions. General . soil quality assessment . How to take a soil test. What to test for. Interpreting results. 307B. Lecture 8. D. r. Mahmoud Nour El-Dein. Composition of Organic Matter. Soil organic matter plays important role in the maintenance and improvement of soil properties. It is a dynamic material and is one of the major sources of nutrient elements for plants. . Objectives. Define: soil respiration and soil microbes. Explain the role of soil respiration in determining soil health. Diagram the role of soil respiration in the cycle of life on earth. List and explain inherent factors that affect soil respiration. Objectives. Define: immobilization, mineralization, phosphorus cycle, phosphorus fixation, soil phosphate. Diagram the relationship of phosphorus inputs and soil processes. List and describe inherent factors that affect soil phosphorus. Soil profile. Soil layers are called horizons. . O Horizon. A Horizon. B Horizon. C Horizon. R Horizon. Soil profile. Soil profile. O Horizon. Rich in organic matter in various stages of decomposition .