Soil organic matter - Study guides, Class notes & Summaries

3 things that determine vulnerability to groundwater contamination. - ANSWER-Geologic conditions, depth to groundwater, and weather conditions. Zones of saturation - ANSWER-Areas where water collects underground(Where groundwater is found) Every 5 years or 12 credits in 5 year period. - ANSWER-How often must a pesticide applicator reexam for his license? Oil degredation-resistance and filter efficiency - ANSWER-What respirators are classified by 75 ft - ANSWER-Legal distance from pri...

SCSC 301 Exams 1,2,3,4 Questions and Answers Already Passed What is soil porosity, and why is it important? Soil porosity refers to the amount of open space between soil particles, which is crucial for water and air movement. How does soil texture influence water retention? Clay soils retain water well due to their fine particles, while sandy soils drain quickly because of larger particles. What is the role of gypsum in soil management? Gypsum improves soil structure by reduci...

Define IPM - ANSWER-1. a pest population management system that anticipates and prevents pests from causing damage. 2. an ecological approach to pest control. Components of IPM - ANSWER-1. Pest identification 2. Monitoring 3. Use of natural enemies (biological control) 4. Pest-resistant plants 5. Cultural and structural changes 6. Judicious use of least toxic pesticides Intent of IPM - ANSWER-To use tactics that include pesticide alternatives that reduce the total amount of pestici...

Falsifiable concentrates (EC or E) - Answer-Formulations made up of the technical material, solvents and emulsifiers. Some agitation is required. Once dry, pesticide residue is barley visible. Wettable Powder (WP) - Answer-These formulations are made by impregnating or coating an appropriate powder with the technical insecticide. Wettable Powders do not dissolve in water and frequent agitation is usually required. Heavy applications may leave visible deposits. Soluble Powders (SP) - Answer-...

Define anion and cation. - ANS Anion: negatively charged atom or molecule. Examples include phosphate, sulfate, nitrate, and chloride. Cation: A positively charged atom or molecule. Examples include calcium, magnesium, sodium, potassium and ammonium. Define cation exchange capacity and anion exchange capacity. - ANS CEC is the amount of positively charged cations which can be held by a given weight of soil. Cations are held by negative charges in clay and organic matter. AEC is th...

SCSC 301 - Exam 3, TAMU, Dr. Howe Questions and Answers Rated A+ What is soil permeability, and why does it matter? Soil permeability measures how easily water and air move through soil, influencing drainage and root health. How do earthworms contribute to soil quality? Earthworms improve soil structure by breaking down organic matter and increasing aeration. What is cation exchange capacity (CEC) in soil? CEC is the soil’s ability to hold and exchange positively charged ions, wh...

What are the corresponding colors with the associated soils? __1__ colored soils come from organic matter. __2__ colored soils come from iron and aluminum oxides. __3__ colored soils come from silicates and salts. correct answer: 1 --- BLACK 2 --- RED 3 --- WHITE What are the 4 main components of soil and what are their relative proportions to the composition of soil? correct answer: Mineral matter -- 45% Organic matter -- 5 % Soil Water -- 25% Soil Air -- 25% Which 2 ele...

NREM 301 Exam 1 Questions and Answers Graded A+ What is the difference between physical and chemical weathering? Physical weathering breaks down rocks into smaller pieces without changing their chemical composition, while chemical weathering involves changes to the minerals in the rock due to reactions with water, air, or other chemicals. How does frost wedging contribute to physical weathering? Frost wedging occurs when water enters cracks in rocks, freezes, expands, and breaks the...

Varieties of grass containing endophyte fungi are an example of: - Answer- Plant resistance. Raking, thatch removal and aeration are examples of: - Answer- Cultural controls. Hand removal, traps, barriers and repellents are examples of: - Answer- Mechanical and physical controls. Example of a turfgrass disease that can be managed with hand removal techniques: - Answer- Slime mold. Turf cannot at the same time benefit from biological control methods and be pest free because: - Answer-...

1. Additions: precip, organic matter, nutrients 2. Transformation: organic matter to humus. Primary (unaltered rock) to secondary minerals (chemically altered, original rock not apparent) by chemical change, dissolution and reprecipitation and biological change. 3. Translocation: Eluviation, Illuviation. 4. Losses: erosion: Leaching. - Soil formation process 1. Cation exchange capacity (CEC): the ability of soil colloids to exchange cations between the surface and the soil solution. This ...