Nebraska Certified Crop Advisor Practice Test

These questions are part of the practice quiz. Start practicing

• What is the main benefit of crop rotation?
• Which of the following factors does not influence wind erosion?
• What happens to the movement of organic solutes in soils as organic matter content increases?
• Which practice can help in reducing erosion on agricultural land?
• Pesticides should NOT be stored in a ______ building.
• Which of the following can negatively affect crop yields in a no-till system?
• Seed quality is usually highest for seed stored under which conditions?
• What is the primary purpose of starter fertilizer in no-till systems?
• Offspring of two plants that differ genetically are known as what?
• ___________ is used to locate a position in a field.
• Crop mix on a farm is used to reduce what?
• What type of fungicides are absorbed by the plant and distributed internally to prevent disease infection?
• Which of the following is an advantage of a crop rotation over a monoculture system?
• What is the primary benefit of proper seed treatment?
• When a legume is grown in rotation with a grain crop, how does it affect nitrogen fertilizer rates for the grain crop?
• Which organic material is expected to mineralize the most nitrogen?
• During what growth stage do plants primarily focus on root and shoot development?
• Which of the following NO3 concentrations would be considered hazardous to an infant?
• To increase soil organic matter levels, what practice must be markedly reduced or eliminated?
• Soil organic matter is a primary source of what nutrient for crops?
• Soil microorganisms cause what effect on soil structure when crop residues are added?
• What is responsible for decreased phosphorus availability in the soil?
• Which of the following nutrient uptake mechanisms is most important after a rainfall event?
• Which nitrogen fertilizer source has the least percentage of nitrogen?
• Herbicides are usually most effective on which type of plants?
• In which tillage situation is soil erosion potential highest?
• Which of the following pollutants in water is not generally attributed to agriculture?
• Soil structure modifies the physical properties of soil related to what aspect?
• When developing a sampling scheme for a pest, which factor is not necessary to consider?
• What is a potential disadvantage of double cropping systems?
• Why is it essential to ensure optimal planting depth for seeds?
• What is essential for assessing the effectiveness of an integrated pest management program?
• A major way calcium is supplied to plants is by what process?
• If soil has an EC of 6.0 mmhos/cm and contains 20% sodium on the CEC, it is a _________ soil.
• Crop root growth can be affected by__________.
• What type of wind erosion can lead to the formation of dust storms?
• Stomates regulate water loss from leaves by varying the resistance to what?
• How many pounds of 10-20-10 should be applied to an acre if the fertilizer recommendation is 26 lbs of P?
• After a water erosion event, surface soil is likely to have what change in organic matter content?
• Which type of fungicide is likely not effective against a wide range of pathogens?
• Natural enemies of pests __________ pest population.
• What practice alongside maintaining crop residues helps reduce surface compaction?
• A major factor affecting crop yield is__________.
• During decomposition, when is immobilization of inorganic nitrogen most likely to occur?
• Extensive use of which soil amendment is most likely to induce a potassium deficiency?
• Crop sensitivity to a pesticide can vary with what factor?
• The primary goal of precision agriculture is to__________.
• What type of erosion is characterized by the removal of a thin layer of soil?
• In many crops, night length is crucial for triggering what process?
• When a plant nutrient is absorbed with water that is moving to and into the plant root, what is this nutrient uptake process called?
• If a nutrient is released to the soil during the decomposition of organic material, what process has occurred?
• When comparing sampling depth, how does no-till soil sampling differ from conventionally tilled soils?
• Which of the following phosphorus sources is in liquid form?
• Which of the following practices is crucial for sustainable agricultural management?
• Which would you do first if a pesticide spill occurs?
• Potassium that is fixed by soil minerals is considered to be ______ available to crops?
• What type of pest management focuses on using natural predators?
• Which of the following increases as a soil's clay content increases?
• What does the soil pH level primarily affect?
• What does effective biomonitoring in crop management often require?
• How is phosphorus primarily transported from fields?
• Which fertilizer recommendation concept best increases soil fertility levels most slowly?
• In a no-till situation, soil test values in the top 2 inches of soil are generally ______ soil test values below 2 inches.
• The seeding rate is always more than what?
• What is a key benefit of cover crops in agriculture?
• Which of the following is characteristic of a poorly drained soil?
• What is the goal of crop rotation?
• Which of the following nutrients is more mobile in a flooded soil than in an upland soil?
• Which of these practices can help manage weeds effectively?
• Acute pesticide poisoning is how poisonous a pesticide is to humans after________ exposure(s).
• The presence or absence of which feature is critical for differentiating grass weed seedlings?
• Which of the following is a characteristic of a well-designed field trial?
• How much will per acre income increase with one treatment of the insecticide as compared to no treatment if the insecticide costs $10 per acre?
• What characteristic is used to identify grass weed seedlings?
• What characteristic is primarily responsible for a weed's competitive advantage in a crop field?
• What is an essential consideration when selecting a crop for a specific area?
• When organic materials decompose, most of the carbon ends up as what?
• How many acres are in the S 1/2 of the S1/2 of Section 29?
• Soil compaction can affect plant growth by ______.
• How does night length influence crop development?
• What factor primarily hinders seedling emergence?
• Contact pesticides exert their pesticidal action where?
• Which pesticide characteristic would likely lead to the most groundwater pollution?
• What term describes a weed that produces seeds every two years?
• Which soil condition is favorable for symbiotic nitrogen fixation?
• What is the recommended action if faced with adverse weather prior to seeding?
• When does maximum evapotranspiration (ET) generally occur?
• Pesticide carryover is most important in _________ crops.
• Which is the best pretreatment method for a tissue sample before submitting it for analysis?
• Which of the following pest management techniques is proactive rather than reactive?
• A crop should be replanted when stand is lost due to some stress, when__________.
• How are fertilizer recommendations derived from a plant tissue analysis typically used in the current crop year?
• What is often the most critical limiting factor for a weed when the crop outgrows it?
• Which factor is most important in herbicide carryover?
• What is the term for water moving horizontally through the soil?
• Fields are fallowed to conserve________.
• Limited soil moisture generally ______ nutrient uptake.
• Which of the following is negatively charged?
• Which pathogen typically requires living tissue for its survival?
• What is the primary determinant of infiltration rates in soil?
• The maximum value for plant available water is________.
• The stable form of soil organic matter is known as what?
• Yield maps from year to year for the same crop.
• What process helps to maintain soil fertility and structure through organic matter contributions?
• Which of the following nutrient forms is the most immobile in soil?
• ECCE is the product of Effectiveness and__________.
• Which nutrient regulates stomatal openings in plants?
• What aspect is NOT included in integrated pest management?
• If the pure live seed percentage is 80% and the recommended seeding rate is 80 lbs per acre, what should be the adjusted seeding rate?
• Soil pH affects__________.
• Which type of soil structure is most conducive to good drainage?
• Which of the following insecticides are most persistent in soils?
• What is a common purpose of soil testing?
• What is a disadvantage of monoculture practices?
• Which of the following loss pathways is of most concern for loss of nitrate N?
• Which micronutrient becomes more available at pH 7 compared to pH 5.1?
• What type of soil management practice can enhance soil organic matter content?
• In which circumstance is potassium deficiency most likely to occur?
• Which of the following is not used in determining a lime recommendation?
• What is the term for rapid water movement downward in large pores after a rain?
• GMO plants contain which of the following?
• What is the common method used to apply fertilizers to pastures?
• A plant that lives 10 years is a__________.
• Which of the following factors is most likely to decrease germination percentage?
• What type of fungicides are designed to kill specific pests?
• What effect does tillage have on soil structure?
• Which of the following is a chemical uptake form of phosphorus?
• What characteristic helps weeds to survive and compete effectively?
• What is specifically designed to improve ground water quality before it moves to a stream?
• __________is used to apply fertilizers, pesticides and seeds.
• Which factor is associated with increased soil microbial activity?
• What is the main consequence of nutrient leaching in agricultural fields?
• What is the chemical composition of common agricultural lime?
• Which compound can be found in the air at levels that can damage crops?
• Under worker protection standards, what must employers provide?
• Which of the following is not a contribution of soil organic matter to soil properties?
• Growing degree days are least useful for determining when to do what?
• If the base temperature is 60°F, the daily temperature is 80°F, and the maximum temperature is 95°F, how many heat units have accumulated?
• A double cropping system is where two crops are grown in the same field over__________.
• Which of the following biological control agents is commonly recognized?
• If a fertilizer analysis is 13-13-13 on an oxide basis, what is the analysis on an elemental basis?
• What are the keys to reducing fertilizer nitrogen entering ground and surface waters?
• In the context of pest management, what does monitoring primarily aim to achieve?
• Which of the following agents is responsible for causing diseases that reduce pest populations?
• What insect stage is often most vulnerable to management practices?
• When diagnosing a crop production problem in the field, you should__________.
• In integrated pest management, the economic injury level is defined as the level at which the cost of treatment equals what?
• What is the relationship between plant seeding rate and plant population?
• Which of the soil textures listed below has the highest porosity and lowest bulk density?
• Which characteristic typically indicates a pesticide's potential to leach into groundwater?
• What can be a major source of groundwater contamination?
• At which of the following plant growth stages would you expect the highest demand for soil nutrients?
• The economic threshold (ET) is the level of pest injury when pest control will prevent the __________ from being reached.
• Buffer strips are beneficial for reducing which of the following?
• What insect is commonly associated with the damage it does to crops and is often depicted in educational materials?
• Which practice can help manage soil erosion?
• If the yields of varieties A, B, and C are 45, 50, and 44 Bu per acre respectively, and the LSD is 5, which statement is true?
• Which of the following is a limitation of a crop rotation over a monoculture system?
• Which soil structure will provide the best internal drainage?
• What is the primary benefit of increasing soil organic matter in agricultural soils?
• In which scenario is monoculture most likely to increase pest populations?
• Which of the following is normally not considered when comparing a crop rotation with a monoculture system?
• In which scenario would you expect the highest nitrogen mineralization?
• Which of the following would not usually be a good source of nitrogen?
• At which soil pH would phosphorus be most available for plant uptake?
• Production history or level of management is a good way to determine_______.
• Which nutrient is essential for the photosynthesis process in plants?
• At which growth stage are nutrients in the greatest demand for most crops?
• Which type of pathogens are known to cause discolored mosaics on plants?
• Which of the following plant nutrients is a cation in soils?
• What role do legumes play in crop rotation systems?
• Which of the following clays contributes most to CEC if the same amount of each clay is present?
• Which application method increases the potential for non-target crop injury?
• Which type of plant is known for symbiotic nitrogen fixation in its root nodules?
• Worker protection standards do not specifically require which of the following?
• What factor can significantly mitigate soil erosion during pesticide application?
• Over application of phosphorus is often the result of using ______ for fertilizer.
• Which root system concentrates nutrient uptake in surface soil?
• Which kind of soil structure would be typical for a good seed bed?
• What is the equivalent of ten (10) ppm?
• What technique can help reduce phosphorus transport from a field?
• Which factor is not commonly used to determine planting depth?
• Which of the following plant nutrients is classified as a secondary nutrient?
• Which factor does NOT influence pest monitoring techniques in integrated pest management?
• How should soil for nematode analysis be handled before shipping?
• What is a limitation associated with seed treatment?
• The final step in a nutrient management plan is__________.
• Excessive soil moisture generally _______ nutrient uptake.
• Which factor can significantly impact a crop's susceptibility to diseases?
• Which of the following anions is most likely to leach?
• What form of potassium is considered most available to plants?
• What is the primary impact of soil moisture on crop planting?
• Which practice can enhance crop resilience to climate variability?
• Which component is essential to prevent reaching the economic injury level in pests?
• Which of the following factors could potentially lead to a reduced seeding rate?
• Which lime source could be used to correct a magnesium deficiency in soil?
• If a plant can exclude or overcome a disease, it is considered ________.
• What is one method to reduce erosion in agricultural practices?
• What is a major way in which insects feed?
• Good structure in the subsoil primarily improves what aspect of plants?
• What is the approximate plant population if you count 10 plants in 5 sq ft of a field?
• What crop growth stage is characterized by the development of roots, stems, and leaves?
• Which of the following insecticides target insect eggs?
• What typically happens to the water needs of a crop during the season?
• In a non-uniform field, soil sampling should be conducted by which method?
• Which of the following textural classes has the largest potential available water?
• The key factor influencing the photosynthesis rate in plants is__________.
• Which item is usually found on a seed information tag?
• What term describes the application of a pesticide that targets juvenile insects?
• In agricultural management, what is the term for the practice of controlling pests with biological methods?
• Which soil property is most directly affected by soil structure?
• Which of the following is a common practice to improve soil health in crops?
• What conservation practice is advisable for managing soil on steep slopes?
• Which of the following harvest conditions most likely would reduce seed quality?
• Lime passing through which of the following mesh sizes would be of greatest benefit in neutralizing soil acidity?
• Which of the following factors influences the rate of transpiration?
• How do split applications of nitrogen fertilizer compare to a single application regarding leaching losses?
• What is defined as the plant nutrient concentration below which crop growth rate declines significantly?
• What is usually the most important factor in deciding when to plant crops?
• On a day with what probability of precipitation would pesticide application minimize losses in runoff?
• What term describes when a plant produces a chemical toxin that impairs the growth of a different plant?
• Which of the following is not part of the purpose of a nutrient management plan?
• What type of tillage is characterized by minimal soil disturbance and retention of soil structure?
• What is the goal of using pathogens in pest management?
• _______ is considered better than _________ for incorporating broadcast fertilizers.
• Which condition is NOT favorable for seed germination?
• Which of the following is LEAST LIKELY to be used to control a pest?
• What is one of the primary reasons for crop rotation?
• If a non-target crop has an albino appearance, it may have been sprayed with what type of pesticide?
• Which of the following practices accelerates canopy closure?
• Maximum plant available water is defined as:
• Which of the following helps in ensuring effective water management in crop production?
• What site characteristic increases the potential for soil and water pollution by a pesticide?
• What two factors, when increased and decreased, result in higher erosion rates?
• Cations are held on the CEC by _______ charges on clay and organic matter.
• Which factor is often considered an advantage of using cover crops?
• If the ECCE of a liming material is 65 and the lime recommendation for a state is based on material with an ECCE of 80, how should lime rate be adjusted for the material with an ECCE of 65?
• The irrigation method where water is applied at low volume is _______.
• Which soil property is greatly affected by excessive tillage?
• Starter fertilizer is commonly recommended for which planting method?
• Which type of acidity is most important in determining the required lime rate?
• In nutrient management, which nutrient is most commonly associated with groundwater pollution due to leaching?
• What is the best practice to improve soil infiltration?
• If insects are concentrated in specific areas of a field, how should samples be taken?
• Which of the following calcium sources should not be used as a lime source?
• Potassium Fixation occurs when which of the following clays is present in soil?
• Which method is most commonly used to lower soil pH?
• Which of the following is not needed for rapid nitrification to occur?
• How does runoff respond as surface residue increases?
• Which of the following DOES NOT encourage pesticide resistance to develop?
• Which agricultural practice helps to retain moisture in soil?
• Which of the following is most likely to cause a soil pH increase?
• When might knowing growing degree days be least helpful?
• Which of the following nutrients is classified as a micronutrient?
• If the value of a crop is $31 per bushel and a production practice costs $11.50 per acre, which of the following yield increases would make the production profitable?
• How many pounds of 10-20-10 should be applied to an acre if the fertilizer recommendation is 60 lbs of P2O5?
• What effect do surface residues have on surface soil warming in the spring?
• What is one major consequence of decreased surface residue?
• Which type of pesticide has the highest probability of moving to groundwater?
• Which of the following soil textures would likely have the lowest soil fertility?
• What is the growing point of a grass referred to as?
• Which characteristic is crucial for determining the safety of a pesticide?
• What does the term 'intercalary meristem' refer to in grasses?
• Which of the following factors is most important in maintaining crop quality during storage?
• What is the primary role of biennial weeds in agriculture?
• What is an effect of high soil organic matter content on water movement?
• Which of the following is not an essential nutrient for plants?
• What must exist for evapotranspiration (ET) to occur?
• Harvest date is affected by__________.
• In a typical row crop production system, most of the soil organic matter originates from what source?
• How does the optimum temperature for crop growth and development change?
• What is the most common form of potassium fertilizer?
• What is the likely outcome of seeding a summer crop too early?
• What is the textural class of soil that is 10% clay and 35% sand?
• Which of the following is the least available source of nutrients?
• What can the cropping history of a field be used to identify?
• Which of the following pathways is of most concern for loss of phosphate from a recently tilled soil?
• Subsurface compaction from tillage usually starts at what depth?
• Which of the following characteristics is used to identify broadleaf weed seedlings?
• As soil pH decreases, what happens to the concentration of hydrogen ions?
• Which microorganism group is most beneficial for soil structure enhancement?
• Conditions which favor volatile losses of nitrogen as ammonia include what factor?
• Which of the following is important in any disease management programs?
• What stage of a crop’s development is most susceptible to insect damage?
• ___________ is not a limitation of cover or companion crops.
• Which of the following factors increases soil water storage?
• Which of the following is the best measure of plant available phosphorus in soil?
• How does vegetation impact soil erosion?
• Which of the following is NOT one of the three sides of the disease development triangle?
• Using cover crops primarily helps to improve what aspect of farming?
• In the standard germination test, what happens to viable seeds?
• At which soil test level would you expect to see the greatest crop response?
• Which type of soil would require the highest lime application to achieve the same target pH?
• What is denitrification primarily responsible for converting to gaseous forms?
• What is the consequence of not managing natural pest populations?
• When using proper pest monitoring procedures, what is the primary focus for treatment decisions?
• Which of the following methods is least effective in predicting disease outbreaks in crops?
• Which type of metamorphosis involves distinct egg, larva, pupa, and adult stages?
• What environmental factor is crucial for the growth advantage of a crop over competing weeds?
• Which of the following methods of sampling for insects is the most specific?
• Which factor is usually most important when selecting a variety for planting?
• Well water contamination from surface water can be prevented by using a ______.
• What is the chemical uptake form of nitrogen in plants?
• What is a primary benefit of crop rotation in agriculture?
• In clean-till systems, tillage can spread which of the following?
• If the pure seed content is 90% and the germination rate is 90%, what is the percent Pure Live Seed (PLS)?
• What is a major method by which pests are transported to host plants?
• What does the term "pest host" refer to in crop management?
• Nutrient balances consider____________.
• Which of the following statements is true regarding integrated pest management?
• Which of the following is an adjuvant designed to reduce pesticide drift?
• Which method is used to evaluate soil drainage quality?