This quiz works best with JavaScript enabled. Home > Agronomy > Crop Science > Agronomy – Quiz 1 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Agronomy Quiz 1 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Name the condition in which stalks or stems break or fall over above the soil surface because of weak stalks, weak roots, damage, or weather events. A) Germination. B) Lodging. C) Maturation. D) Emergence. Show Answer Correct Answer: B) Lodging. 2. What is the key benefit to banding phosphorus fertilizers? A) Less phosphate leaching. B) A concentrated alkaline zone. C) Less tie up in the soil leading to better plant availability. D) Required for higher fertilizer rates. Show Answer Correct Answer: C) Less tie up in the soil leading to better plant availability. 3. Which of the following definitions best describes a petiole? A) The surface of the leaf. B) The small stem attached to the leaf. C) The vein structure in the leaf. D) The edge of the leaf. Show Answer Correct Answer: B) The small stem attached to the leaf. 4. A wheat farmer is budgeting expenses for his coming growing season as this time he projects his total expenses to be $ 412.80 per acre. His average wheat yield is 80 bu/ac. What is his breakeven price per bushel? A) $ 5.16. B) $ 5.29. C) $ 6.49. D) $ 7.74. Show Answer Correct Answer: A) $ 5.16. 5. Which system uses a constellation of orbiting satellites to identify a location on Earth based on longitude and latitude coordinates along with altitude? A) Geographic Directional Coordinates (GDC). B) Variable Rate Technology (VRT). C) Geographic Information System (GIS). D) National Air and Space Association (NASA). Show Answer Correct Answer: C) Geographic Information System (GIS). 6. Compaction is the reduction of: A) Soil CEC. B) Soil weight. C) Soil pore space. D) Soil density. Show Answer Correct Answer: C) Soil pore space. 7. Plant diseases occur when the following occur at the same time: A) A susceptible plant, a virulent pathogen, and a favorable environment. B) A susceptible plant, a virulent pathogen and insect pests. C) A virulent pathogen, an environment favorable for disease and insect pests. D) A susceptible plant, insect pests, and freezing temperatures. Show Answer Correct Answer: A) A susceptible plant, a virulent pathogen, and a favorable environment. 8. What is a horizontal layer of soil, created by soil forming processes, that differ in physical or chemical properties from adjacent layers called? A) Hardpan. B) Soil horizon. C) Fragipan. D) Tillage pan. Show Answer Correct Answer: B) Soil horizon. 9. Soil samples for distinctly different areas of the field should be (i.e. different soil types or hill tops vs. bottom lands): A) Analyzed separately. B) Mixed together to represent a single production unit. C) Ignored as being meaningless. D) Mixed together for large fields and kept separate for small fields. Show Answer Correct Answer: A) Analyzed separately. 10. When do broadcast applications of dry fertilizer become plant available? A) When crop residues are decomposed. B) After irrigation or rainfall dissolves the fertilizer and moves into the root zone. C) When is tilled 6 to 8 inches into the soil with a tillage tool. D) When soil temperatures rise above 70 degrees Fahrenheit. Show Answer Correct Answer: B) After irrigation or rainfall dissolves the fertilizer and moves into the root zone. 11. What is the conversion of ammonium to nitrate known as? A) Ammonification. B) Denitrification. C) Mineralization. D) Nitrification. Show Answer Correct Answer: D) Nitrification. 12. Growing two or more crops together in the same field at the same time is known as? A) Intercropping. B) Strip till. C) Continuous cropping. D) Double crop. Show Answer Correct Answer: A) Intercropping. 13. At which stage of growth should plant tissue samples should be taken? A) Sufficiently in advance of fertilization to allow time for analysis and return of results from the lab. B) Any time before bloom. C) Early season shortly after emergence. D) The stage that corresponds to those used to develop interpretive guidelines. Show Answer Correct Answer: D) The stage that corresponds to those used to develop interpretive guidelines. 14. How does soil texture influence the development of soil compaction? A) Clay soils are more likely to suffer compaction than are sandy soils. B) Sandy soils are quite subject to compaction when dry. C) It is basically impossible to compact a silt loam. D) The amount of water present is far more important than its textural class. Show Answer Correct Answer: A) Clay soils are more likely to suffer compaction than are sandy soils. 15. ..... is adsorbed as a cation and is part of the chlorophyll molecule. A) Na+. B) H+. C) Ca+2. D) Mg+2. Show Answer Correct Answer: D) Mg+2. 16. A sodic soil is characterized by having a disproportionally high concentration of what exchangeable cation in the Cation Exchange Capacity (CEC) complex? A) Calcium. B) Chloride. C) Magnesium. D) Sodium. Show Answer Correct Answer: D) Sodium. 17. ..... is an eroded material deposited by running water including gravel, sand, silt, and clay. A) Bedrock. B) Glacial till. C) A loess deposit. D) An alluvial deposit. Show Answer Correct Answer: D) An alluvial deposit. 18. UAN fertilizer at 28% nitrogen costs $ 226.50 per ton. The liquid fertilizer weighs 10.67 pounds per gallon. What is the per pound cost for the nitrogen? A) $ 0.37/pound. B) $ 0.40/pound. C) $ 0.55/pound. D) $ 0.63/pound. Show Answer Correct Answer: B) $ 0.40/pound. 19. Of soil compaction severity occurs with the ..... tire pass although the depth of the compaction is determined by the ..... axle load. A) First, lightest. B) First, heaviest. C) Last, lightest. D) Last, heaviest. Show Answer Correct Answer: B) First, heaviest. 20. What causes clay soils to often drain slower than loam soils following heavy rain or irrigation? A) Clay soils have more sodium. B) Clay soils have smaller diameter pores. C) Loam soils have less total pore space. D) Clay soils often have less organic matter. Show Answer Correct Answer: B) Clay soils have smaller diameter pores. Next →Related QuizzesAgronomy QuizzesAgronomy Quiz 2Agronomy Quiz 3 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books