Factors influencing availability of nutrients - SS2 Agriculture Past Questions and Answers - page 2
What is the primary role of beneficial soil microbes?
Cause nutrient loss
Immobilize nutrients
Break down organic matter, releasing nutrients
Reduce soil aeration
Which environmental condition can lead to nutrient loss through leaching?
Drought
Excessive rainfall
Low temperatures
High humidity
What can help prevent nutrient depletion when crops are harvested?
Crop rotation
Soil compaction
Over-irrigation
Fertilization
Which factor can directly affect soil nutrient availability?
Soil color
Soil density
Soil texture
Soil temperature
What is the term for the process of nutrient immobilization by harmful microbes?
Nutrient cycling
Nutrient cycling
Nutrient fixation
Nutrient release
How can farmers mitigate the effects of nutrient leaching in their fields?
Farmers can mitigate nutrient leaching by adjusting irrigation practices, using cover crops, and applying controlled-release fertilizers.
Explain how soil texture influences the availability of nutrients.
Soil texture influences nutrient availability by affecting how well the soil retains or drains water, with clay soils holding nutrients better than sandy soils.
What are the benefits of maintaining a balanced pH level in the soil for crop production?
Maintaining a balanced pH level in the soil ensures that essential nutrients are available to plants, as extreme pH levels can limit nutrient uptake.
Describe the role of organic matter in soil in relation to nutrient availability.
Organic matter in soil serves as a source of nutrients over time as it decomposes, enriching the soil and making nutrients available to plants.
How can soil microbial activity be promoted to enhance nutrient cycling in agricultural practices?
Soil microbial activity can be promoted through practices such as adding organic matter, reducing soil disturbance, and using microbial inoculants, which enhance nutrient cycling and benefit plant growth.