Agronomy Basic 2 — Questions and Answers
Question 1: Which soil texture has the largest individual particle size?
- Clay
- Silt
- Sand (Correct answer)
- Loam
Correct answer: Sand
Sand particles are the largest, ranging from 0.05 to 2.0 mm in diameter.
Question 2: What is the primary purpose of crop rotation in agronomy?
- Increase irrigation efficiency
- Break pest and disease cycles while maintaining soil fertility (Correct answer)
- Reduce labor costs
- Improve farm equipment longevity
Correct answer: Break pest and disease cycles while maintaining soil fertility
Crop rotation disrupts pest and disease cycles and helps maintain soil nutrient balance by alternating crops with different nutrient needs.
Question 3: What does the term 'photoperiodism' refer to in plants?
- The rate of photosynthesis per day
- A plant's response to the relative length of day and night (Correct answer)
- The amount of light a plant absorbs
- The angle at which leaves capture sunlight
Correct answer: A plant's response to the relative length of day and night
Photoperiodism is a plant's physiological response to the duration of light and dark periods, which often triggers flowering.
Question 4: Which macronutrient is most commonly associated with promoting root development in crops?
- Nitrogen (N)
- Potassium (K)
- Phosphorus (P) (Correct answer)
- Calcium (Ca)
Correct answer: Phosphorus (P)
Phosphorus is essential for energy transfer and root development, often applied to encourage strong root systems.
Question 5: What is 'no-till farming' primarily designed to conserve?
- Water usage through irrigation
- Soil structure and organic matter (Correct answer)
- Seed germination rates
- Pesticide application costs
Correct answer: Soil structure and organic matter
No-till farming avoids disturbing the soil, which conserves soil structure, reduces erosion, and maintains organic matter levels.
Question 6: The process by which plants lose water vapor through small pores in their leaves is called:
- Osmosis
- Transpiration (Correct answer)
- Evaporation
- Respiration
Correct answer: Transpiration
Transpiration is the process by which water moves through a plant and evaporates from aerial parts, primarily through stomata.
Question 7: Which of the following is classified as a legume crop?
- Wheat
- Corn
- Soybean (Correct answer)
- Sorghum
Correct answer: Soybean
Soybeans are legumes that form symbiotic relationships with nitrogen-fixing bacteria, making them valuable in crop rotations.
Agronomy Basic 2
Which soil texture has the largest individual particle size?