Podcast
Questions and Answers
=The advantage of soil microbial diversity includes _________
=The advantage of soil microbial diversity includes _________
- =Functional redundancy
- =Enhance soil resilience following disturbance
- a and b plus, reduces weeds
- only a and b (correct)
The correct order of the microorganisms according to their role to soil aggregates is ___
The correct order of the microorganisms according to their role to soil aggregates is ___
- fungi > actinomycetes > gum producing bacteria > yeasts (correct)
- fungi > yeasts > gum producing bacteria > Actinomycetes
- Actinomycetes > fungi > gum producing bacteria > yeasts
- None of the above
All of the following are factors that reduce soil microbial diversity, except____
All of the following are factors that reduce soil microbial diversity, except____
- Increased intensity of tillage
- Deforestation
- Crop rotation and application of fertilizer (correct)
- Crop monoculture
The highest microbial diversity of soil is observed in _________soil
The highest microbial diversity of soil is observed in _________soil
The symbiotic nitrogen fixation system that is beneficial in rice production among the following is ____
The symbiotic nitrogen fixation system that is beneficial in rice production among the following is ____
What is the role of mycorrhizae in plant nutrition?
What is the role of mycorrhizae in plant nutrition?
What is the role of Bt biopesticides in pest management?
What is the role of Bt biopesticides in pest management?
What are the key factors influencing microbial organic matter decomposition in soil?
What are the key factors influencing microbial organic matter decomposition in soil?
What are the key factors influencing exchangeable cations in soil?
What are the key factors influencing exchangeable cations in soil?
Why are nitrogen (N) and phosphorus (P) considered limiting nutrients in most soils?
Why are nitrogen (N) and phosphorus (P) considered limiting nutrients in most soils?
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Study Notes
Soil Microbial Diversity
- Soil microbial diversity has several advantages, including improved ecosystem functioning, increased nutrient cycling, and enhanced plant growth.
Role of Microorganisms in Soil Aggregates
- The correct order of microorganisms according to their role in soil aggregates is: fungi, bacteria, and archaea.
Factors Affecting Soil Microbial Diversity
- All factors except soil pH reduce soil microbial diversity, including land use change, climate change, pollution, and intensive agricultural practices.
Soil Type with Highest Microbial Diversity
- The highest microbial diversity is observed in tropical soil.
Symbiotic Nitrogen Fixation in Rice Production
- The symbiotic nitrogen fixation system beneficial in rice production is Rhizobium-legume symbiosis.
Role of Mycorrhizae in Plant Nutrition
- Mycorrhizae play a crucial role in plant nutrition by facilitating nutrient uptake, particularly phosphorus, and improving plant water relations.
Role of Bt Biopesticides in Pest Management
- Bt biopesticides are used in pest management to control insect pests by producing toxins that kill specific insect species.
Factors Influencing Microbial Organic Matter Decomposition
- Key factors influencing microbial organic matter decomposition in soil include temperature, moisture, oxygen availability, and nutrient availability.
Factors Influencing Exchangeable Cations in Soil
- Key factors influencing exchangeable cations in soil include pH, clay content, and organic matter content.
Limiting Nutrients in Soil
- Nitrogen (N) and phosphorus (P) are considered limiting nutrients in most soils because they are essential for plant growth, but their availability is often limited due to various factors, including soil type, nutrient cycling, and human activities.
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