Rangeland Soil Practice Exam

These questions are part of the practice quiz. Start practicing

• Differentiate wind erosion and water erosion and cite indicators for each in the field.
• What is the difference between weathering and erosion?
• According to instructors' emphasis on infiltration, low infiltration leads to what?
• Which process breaks material down in place?
• Which organism is associated with slow nutrient cycling?
• Which statement best describes the role of soil color in relation to oxidation state and moisture?
• Which nutrient is most likely to leach quickly?
• Which statement best describes the property measured by CEC in soils?
• What is physical weathering?
• Redox reactions in soil are controlled by which factors?
• Higher grazing pressure increases soil compaction and reduces infiltration. Which pair of practices helps mitigate compaction?
• Which statement about nitrate binding is true?
• Why does clay usually hold more nutrients than sand?
• What is the role of soil organic carbon in carbon sequestration on rangelands, and what practices help increase SOC?
• What happens to infiltration when sodium levels increase?
• Which term describes the movement of solutes along a concentration gradient without cellular energy input?
• Fungi contribute to soil in which of the following ways?
• Which of the following is a common soil cation example among the options?
• In pedogenesis, which process adds materials to the soil profile?
• Define soil permeability and hydraulic conductivity, and explain their difference.
• What is the function of windbreaks and shelterbelts in protecting soils from wind erosion in rangelands?
• Which process changes rocks primarily through chemical reactions like oxidation or hydrolysis?
• Which organism is associated with fast nutrient cycling?
• Hyphae are structures of which group of organisms?
• Which term describes the movement of water across a semipermeable membrane from higher water potential to lower water potential?
• Which soil type usually has the greatest nutrient retention?
• Which soil structure has poor infiltration and poor aeration?
• In pedogenesis, translocations refer to the movement of materials within the soil profile. Which horizon is typically formed by clay illuviation due to translocations?
• Which statement about nitrate mobility is most accurate?
• Which soil texture would have the slowest infiltration and highest nutrient retention?
• Why does clay retain nutrients better than sand?
• Which soil type typically has rapid infiltration?
• Which statement accurately describes cations in soils?
• What do earthworms do for soil?
• Which soil color hue indicates iron oxides and varying drainage?
• What does soil pH measure and how do field and lab measurements differ, and what is the typical target pH range for many rangeland plants?
• Reduction is defined as which?
• Which soil structure is BEST for plant growth?
• Which nutrient movement process is driven by a concentration gradient and does not require energy?
• Which nutrient is an anion commonly discussed in class?
• Which statement best contrasts weathering and erosion?
• What does a hardpan restrict?
• Which set of factors is commonly used to evaluate soil erosion risk in rangelands?
• What process moves nutrients downward with water?
• A sodic soil is best described as which of the following?
• How does residue management influence soil temperature and moisture retention in arid-range soils?
• In soils, which process is a major role of bacteria?
• Field capacity is defined as the water content after gravitational drainage.
• What are the key functions of biological soil crusts in rangeland soils, and which management practices protect them?
• Which condition MOST increases runoff and erosion?
• What is one major effect of runoff?
• Infiltration is best described as what?
• Describe deferred-rotation grazing and its expected benefits for soil health in rangelands.
• Soil compaction increases which property?
• Which combination correctly matches soil pH with phosphorus binding?
• Infiltration describes which process?
• What happens at field capacity?
• What are hyphae?
• Why does nitrate not bind strongly to soil?
• Which process involves breaking rock down in place by physical forces such as freeze-thaw or root growth?
• List considerations for seedbed preparation for native grasses in rangeland reseeding and how soil texture affects this.
• Which of the following best describes humus?
• What does SMP buffer pH method estimate?
• Overland flow occurs when infiltration capacity is exceeded.
• Which pores stay filled longest after rainfall?
• What is erosion?
• Why does nitrate move easily through soil after heavy rainfall?
• Which mechanism describes water movement that involves bulk movement with the moving water?
• Which management action helps reduce slope length-related erosion risk on rangeland slopes?
• Which factor is used to describe rainfall erosivity in erosion risk assessment?
• What causes overland flow?
• Loss of electrons is which term?
• Define pedogenesis and list major soil-forming processes (additions, losses, transformations, translocations).
• Explain cation exchange capacity (CEC) and base saturation and their significance for nutrient availability in soils.
• Which soil structure is most likely to promote rapid drainage and root penetration?
• What did the instructor say was more important than memorizing definitions?
• What is one major effect of erosion?
• What kind of charge do anions have?
• What is soil organic matter and how does it influence soil properties?
• What soil component greatly increases CEC?
• Which nutrient movement process depends on water flow?
• Which statement best defines diffusion in soils?
• Which statement about soil pH is true?
• What pH condition is considered acidic?
• Which statement differentiates soil texture from soil structure?
• Which process involves molecules moving from areas of higher concentration to lower concentration without energy input?
• Which horizon is typically characterized by illuvial accumulation of materials like clay?
• Which transport process is driven by the bulk movement of water carrying dissolved substances through the soil?
• Which soil structure is commonly associated with compaction?
• Which transport process involves the bulk movement of water and dissolved substances with the water itself?
• Outline typical steps to interpret a P and K soil test for rangeland management and decide fertilizer adjustments.
• What does CEC measure?
• What soil test result indicates lime is needed, and how is lime requirement determined?
• What kind of charge do cations have?
• Which soil process is primarily driven by microbial activity and leads to rapid recycling of nutrients?
• Which soil component is most associated with high cation exchange capacity?
• Leaching is defined as what?
• Why is maintaining soil ground cover important for erosion control?
• In soils, cation exchange capacity tends to be higher in which texture?
• Which type of soil usually has slow infiltration?
• Which soil type has the fastest water movement?
• Which pores drain first after saturation?
• A soil has rapid infiltration and low nutrient retention. What soil is it MOST likely?
• What does organic matter improve in soil?
• Which soil structure is usually best for agriculture?
• What is required for nutrient uptake by roots?
• Why is oxygen important for roots?
• Which statement best describes the effect of increasing aggregate stability on soil properties?
• Which practice should be minimized to protect biological soil crusts?
• Plant available water in soils equals FC minus PWP.
• Which statement describes the effect of increasing sodium on infiltration?
• Rest-rotation grazing compared to continuous grazing generally leads to what outcome for soil cover and perennial grasses?
• Which pore type is primarily associated with plant available water?
• Which soil texture has the lowest plant-available water?
• Which organism is associated with fast nutrient cycling?
• Which soil condition leads to reduced infiltration due to clay dispersion by sodium salts?
• Which process describes nutrients moving with water?
• What is chemical weathering?
• Collembola mainly perform which function in soil?
• Which organism is most associated with rapid nutrient cycling in soils?
• Which process describes the downward movement of soluble nutrients with percolating water?
• Salinity is defined as which of the following?
• How do deep-rooted grasses influence drought resilience in shallow soils?
• At high soil pH, phosphorus tends to bind with which element?
• How does soil crust formation impact seedling emergence, and what management practices reduce crusting risk after rainfall?
• Why is aggregate stability an important soil health indicator, and how can management improve it?
• What pH level is considered neutral?
• What are salinity and sodicity, how are they measured, and how do they affect plant growth and soil physical properties?
• The high organic matter content typical of grasslands is primarily due to what feature?
• Which soil conditions impede seedbed establishment for introduced grasses?
• Which statement correctly describes diffusion?
• Which soil texture generally has the lower cation exchange capacity (CEC)?
• Which horizon represents unaltered bedrock in a typical soil profile?
• A sodic soil is best described as which of the following?
• Which property does compaction increase?
• Higher CEC indicates more exchange sites available for holding nutrients; which type of nutrients are held on exchange sites?
• Which organism is primarily associated with long-term carbon storage in soils?
• Provide two benefits and one risk of using prescribed fire in managing rangeland soils.
• Which of the following would typically be included in a soil test for rangeland fertility?
• Which soil component is most associated with high cation exchange capacity?
• What do micropores mainly store?
• How does deeper soil affect water storage and drought resilience in rangelands?
• Why do sodic soils often experience increased runoff and erosion?
• Which nutrient movement process depends on concentration differences?
• Which pore type is MOST important for holding plant available water in dry climates?
• How does sodium affect soil structure and how can it be mitigated in irrigated systems?
• If a soil has a pH around 6.5–7.0 for many grasses, what is likely true about lime application?
• What type of water movement occurs with moving water?
• In soils, which organism is associated with fast nutrient cycling?
• Which statement best describes diffusion?
• Plant-available water (PAW) is water held between field capacity and wilting point. In which soil condition is PAW generally higher?
• Which type of erosion forms large channels?
• Soil compaction reduces which properties?
• Describe the basics of nutrient cycling in rangelands, including the roles of litter, soil microbes, and plant uptake.
• At low soil pH, phosphorus tends to bind with which elements, reducing its availability?
• What is soil respiration and what does it indicate?
• What best describes soil crusts in dryland soils and their impact on infiltration and seedling establishment?
• Which type of erosion forms small channels?
• What process do soil microbes perform to release nutrients from organic matter?
• Differentiate exchangeable bases and base saturation and their role in interpreting soil fertility.
• What do fungi help improve in soil?
• Nitrate is an example of which class of soil ion?
• What does sodium do to soil structure?
• A soil has no visible aggregates, very low porosity, and poor root penetration. What soil structure is described?
• What is field capacity?
• Which process moves nutrients through soil primarily with the flow of water, carrying dissolved minerals along?
• What are two benefits of maintaining soil cover and residue on rangeland soils?
• Which soil condition leads to limited oxygen availability?
• What commonly forms in soils repeatedly plowed at the same depth?
• Identify two indicators to monitor erosion risk before and after implementing soil conservation practices.
• Which process transports sediment from one location to another?
• Mass flow refers to nutrients moving ...
• Low porosity in soil most commonly leads to which two issues?
• What does soil pH control?
• What is leaching?
• What does darker soil color usually indicate in rangeland soils?
• Which soil would MOST likely have the highest CEC?
• Why do grasslands usually have high organic matter?
• Which factor most affects seed germination and seedling emergence when reseeding native grasses?
• Which statement is true about the role of bacteria in soils?
• Which amendment improves sodic soils?
• Which soil horizon is the organic surface litter layer?
• What is weathering?
• Which cations are considered exchangeable bases on soil cation exchange sites?
• What condition commonly occurs in saturated soils?
• What pH condition is considered alkaline/basic?
• Which factor primarily controls pore size distribution in soils?
• Why is gypsum applied to sodic soils?
• What commonly happens in soils that are saturated?
• In rangeland reseeding, how do natural regeneration and introduced grasses differ in terms of soil factors affecting establishment?
• When water moves through soil pores carrying dissolved nutrients with it, this is best described as?
• At high soil pH, phosphorus commonly binds with what?
• What is liming, why is it used in rangeland soils, and how is lime requirement determined?
• Which gas becomes scarcer in soil airspaces when the soil is waterlogged?
• Which type of water movement occurs from high concentration to low concentration?
• What is one major role of fungi in soils?
• Which feature of soils contributes most to nutrient retention in soils like clay?
• Hyphae are best described as...
• What happens to oxygen levels when soils become saturated?
• What causes adhesion and cohesion?
• Which statement about diffusion is true?
• Which organism primarily recycles nutrients and decomposes organic matter in soil?
• What is the role of mycorrhizal fungi in nutrient uptake on rangeland soils?
• Why are fungi important in soils?
• What is the typical target soil pH range for many rangeland species?
• Which chemical interaction causes both adhesion and cohesion in water?
• What does soil compaction reduce?
• Which statement best describes diffusion?
• Which clay mineral type has high shrink-swell behavior?
• What do electrical conductivity (EC) and exchangeable sodium percentage (ESP) indicate in soils, and why are they important for rangeland irrigation?
• What is the primary purpose of classifying land capability for grazing planning?
• Which pore space drains rapidly and holds little water for plant use?
• Base saturation indicates what aspect of soil fertility?
• What do macropores mainly allow?
• How does high soil pH affect micronutrient availability, and what management options can be used to improve nutrient availability?
• Why are soil particles able to attract cations?
• What is a soil map unit and how is it used in rangeland planning?
• What health issue is associated with nitrate contamination?
• Which of the following is NOT typically used as a key indicator of soil health in rangelands?
• How does texture influence infiltration and erosion risk in arid-semiarid rangelands?
• What does adhesion describe?
• Gain of electrons is which term?
• Which of the following is typically considered a micronutrient in soil testing for rangelands?
• What is the effect of sodicity on soil physical properties?
• What is the main difference between weathering and erosion?
• What does the Sodium Adsorption Ratio (SAR) assess in irrigation water?
• What are hyphae?
• How does soil temperature affect microbial activity and nutrient cycling in rangeland soils?
• Fungi contribute to soil aggregation and carbon storage by which organism group?
• Which nutrients are examples of cations?
• Which statement defines oxidation?
• Which practice most commonly leads to the formation of a hardpan?
• How do SAR and ESP differ, and what are their effects on soil structure and infiltration?
• What is one major role of bacteria in soils?
• In soils with high shrink-swell behavior, which clay mineral type is typically involved?
• What does cohesion describe?
• Define bulk density and explain why high bulk density reduces root growth and infiltration.
• Which land capability classes are typically used for grazing and rangeland planning?
• Which soil structure enhances water infiltration and air movement in the topsoil?