CRSS 3060 Exam 1 Study Guide with Complete Solutions

CRSS 3060 Exam 1 Study Guide with Complete Solutions What is soil? - Correct Answer ️️ -1. The surface layer of Earth that supports plant life, any place for growth or development, ground or earth 2. Soil = Air + Water + Solids 3. Sand, Silt, Clay What are the five functions of soil? - Correct Answer ️️ -1. Medium for plant growth 2. Water supply & purification 3. Nature's recycling system 4. Habitat for organisms 5. Engineering medium How many inches of rain per year do we get in Tiftarea? - Correct Answer ️️ - Approximately 52in. What are the 5 soil forming factors? - Correct Answer ️️ -1. Parent material 2. Climate 3. Biota 4. Topography 5. Time Draw, label and understand the volume compositions of soil graph - Correct Answer ️️ -Lecture #1 Slide # 13 List and describe the 3 methods to measure soil texture as done in lab, from least complicate/least accurate to most complicated/most accurate - Correct Answer ️️ -1. Feel Test: touched the soil to feel the different textures 2. Shifting Method: put the soil through multiple layers that got finer as the layers went down 3. Hydrometer: placed in a glass column to measure the density used to calculate sand, silt, clay Name a physical, chemical and biological property of soil we will study in this course - Correct Answer ️️ -1. Physical: texture, density 2. Chemical: pH, CEC, nutrients 3. Biological: earthworms, microbial biomass What is the difference between soil texture and soil structure? What would be examples for each for both a topsoil and subsoil for south Geogria soil (we did in lab) - Correct Answer ️️ -1. Texture: the separates (sand, silt, clay) 2. Structure: how the separates are held together (blocky, platy, granular, and prismatic) Examples in lab: A. Topsoil: the texture was loamy sand and the structure was granular B. Subsoil: the texture was sandy loam and the structure was blocky Explain "Liebig's Law of the Minimum" - Correct Answer ️️ -'Weakest Link Theory'; plant growth is dictated by the lowest/scarcest factor How many essential plant nutrients are there according to Dr. Harris ? - Correct Answer ️️ -16 (CB HOPKNS CaFe Cl Mn Mo Co Zn Mg) How many feet are in an acre? - Correct Answer ️️ -43,560 feet How many pounds does an "acre furrow slice" weigh? - Correct Answer ️️ -2,000,000 lbs From Northwest to Southeast, name the 5 soil regions of Georgia - Correct Answer ️️ - 1. Mountain Valley 2. Piedmont 3. Sand Ridge 4. Coastal Plains 5.Flatwoods Name a state in the US where you are likely to find an alfisol, a mollisol, and ulttisol - Correct Answer ️️ -Ohio, Kansas, GA What is histosol? - Correct Answer ️️ -Organic 'muk' soils Describe south Georgia soil in terms of texture, pH, fertility, organic matter? It is considered a good soil? Why or why not? - Correct Answer ️️ -In general the state of GA is/has: 1. Ultisols 2. Highly weathered 3. Poorly buffered 4. Acidic 5. Low fertility 6. Low OM It isn't considered a 'good' soil Name 5 physical properties of soil(listed in lecture) - Correct Answer ️️ -1. Color 2. Texture 3. Structure 4. Pore space 5. Strength What does color of soil tell you? - Correct Answer ️️ -Clues on drainage, OM, and water content Do a rough drawing of the soil texture triangle, label and number the sides and inc