h. Describe soil asconsisting of weatheredrocks and decomposed organic material.
What are the scientists Pedologist called that study soil? Soil Formation Soil is formed slowly as rock (parent material ) erodes into tiny pieces near the Earth’s surface . Bedrock is the layer of rock just beneath soil. Soil is made up of distinct Soil Layers horizontal layers called horizons . Range: organic upper layers to underlying rocky layers.
What is loam? Soil composed of sand, silt, and clay in relatively even concentration
Soil Properties: Soil Texture Definition: the soil quality that is based on the proportions of soil particles. Affects the soil’s consistency – The soil’s ability to be worked and broken up for farming Influences infiltration – Ability of water to move through the soil – Also known as percolation
Soil Properties: Soil Structure Definition: the arrangement of soil particles Often one type of soil particles will clump in one area, which can block the flow of water through the soil affecting soil moisture.
Soil Leaching Soil leaching refers is the movement of nutrient elements from topsoil through the soil profile. Leaching causes significant nutrient losses , particularly in humid regions with high precipitation. Leaching is a natural process caused mainly by precipitation , acidification and nitrogen saturation.
Soil Properties: Soil Fertility Definition: soil’s ability to hold nutrients and to supply nutrients to a plant Soils vary in the amount of nutrients it contains. Plants need nutrients (such as IRON ) to grow.
Soil pH Soils can be acidic or basic pH scale – Used to measure how acidic or basic a soil is and ranges from 0 to 14 . – The midpoint 7 is neutral. Above 7= basic . Below 7= acidic . The pH of a soil influences how nutrients dissolve in the soil.