Soil horizons - Study guides, Class notes & Summaries

2 examples of changes in global N cycle caused by humans + why problematic - 1. Runoff from agricultural areas causes dead zones - EX: parts of the ocean with no oxygen so nothing can live in it 2. Acid rain due to emissions from power plants—affects soils negatively 3 major forest formations (tree type, precipitation, temperature, and water balance) - 1. Tropical and subtropical rainforest - Evergreen trees - Positive water balance - High annual rainfall and temperatures (because they...

SCSC EXAM ACTUAL EXAM QUESTIONS AND CORRECT DETAILED ANSWERS WITH RATIONALES (VERIFIED ANSWERS) | ALREADY GRADED A+ Five soil forming factors active factors - ANSWER- -climate -biological activity Five soil forming factors passive factor - ANSWER- -parent material -time Five soil forming factors modifying factor - ANSWER- -topography (relief) relief - ANSWER- topography 6 key roles of soil - ANSWER- - medium for plant growth (nutrients, support, water, O2) - system for water supp...

ISA Arborist Certification Practice Exams Part 1 Questions And Answers The ideal soil ratio for solids to pore space is: (A) 20:80 (B) 35:65 (C) 40:60 (D) 50:50 Correct Answer: D What is the correct scientific name for the oak tree genus? (A) Quercus (B) Pyrus (C) Larix (D) Acer Correct Answer: A Which of the following is not one of the five major categories of soil horizons? (A) O (B) E (C) N (D) B Correct Answer: C Loam is least composed of what soil classification? (A) Sand(B) ...

A soil has a bulk density of 1.3 g/cm^3, a particle density of 2.6g/cm^3, a total porosity of .5 and a gravimetric water content of 0.2. Calculate the water-filled porosity. correct answer: .26 After a growing season of heavy tillage traffic across a soil, a soil property that is affected is: correct answer: bulk density From a biological point of view, the most important role of structural development in clayey textured soils is to provide an increase in: correct answer: macro porosity...

Horizons layers of soil that make up the soil profile Biological yield the amount of dry matter produced per unit area economic yield The amount of the part of the plant of usable marketable value is called the biomass the quantity of live organic matter in a given area at a given point in time is called the Harvest index the portion of the crop that is of economic importance roots plants uptake water through the hydroponics a technique of growing plants (without soil) in wat...

Which horizon is not part of the soil solum? correct answer: C Organic matter in soil typically accounts for ____% or less of the soils total volume. correct answer: 5% Pore space in soil may contain either _____ or _____ correct answer: Air Water Soils are the result of ______ and biota acting on parent material over time as modified by ______ correct answer: Climate Topography Though plants depend on soil for growth, which of the items below is found in soil, but not required...

Soil Mass correct answers a three-phase system that consists of solid particles, liquid, and gas. Geotechnical Engineering correct answers It is a technical specialty that deals with soil and rock as supporting materials for structures. Geotechnical Engineering correct answers It deals with the various foundation types that work between the structure and the ground. Geotechnical Engineering correct answers It deals with the soil or rock slopes whose failure may cause loss of human lives...

ecosystem services provided by soil - ANSWER - provides habitats - allows for the cycling of nutrients through terrestrial ecosystems - provides a substrate for plant growth - filters water as rainwater passes through it on its way to rivers and groundwater How does soil form? - ANSWER weathering is the primary process that forms soil - breaks down rock into smaller particles - these small particles of rock combine with decomposing organic material to form soil - As a result...

SCSC EXAM ACTUAL EXAM QUESTIONS AND CORRECT DETAILED ANSWERS WITH RATIONALES (VERIFIED ANSWERS) | ALREADY GRADED A+ Five soil forming factors active factors - ANSWER- -climate -biological activity Five soil forming factors passive factor - ANSWER- -parent material -time Five soil forming factors modifying factor - ANSWER- -topography (relief) relief - ANSWER- topography 6 key roles of soil - ANSWER- - medium for plant growth (nutrients, support, water, O2) - system for water supp...

1 CRSS/ FANR 3060 EXAM 1 | QUESTIONS & ANSWERS (VERIFIED) | LATEST UPDATE | GRADED A+ soil Correct Answer: -layer(s) of generally loose mineral and/or organic material -affected by physical, chemical, & biological processes -usually hold liquids, gases and biota and support plants -non-renewable resource soil functions Correct Answer: anchorage for plants storage and recycling of nutrients regulate water supply habitat for many organisms engineering medium 2 transformations C...