Podcast
Questions and Answers
What is a common characteristic used for the classification of soil profiles?
What is a common characteristic used for the classification of soil profiles?
- Number of species in the profile
- Thickness of horizons (correct)
- Annual rainfall in the region
- pH of the soil material
In soil science, what is a hierarchical classification?
In soil science, what is a hierarchical classification?
- A classification based on the chemical composition only
- A classification based on the number of horizons in the profile
- A classification based on soil color only
- A classification where classes form other objects that can be classified further (correct)
What is a major distinction between natural and technical approaches in soil classifications?
What is a major distinction between natural and technical approaches in soil classifications?
- Natural approaches focus on soil genesis, technical approaches focus on parent material
- Natural approaches group soils based on intrinsic properties, technical approaches do not (correct)
- Natural approaches have fewer classification criteria than technical approaches
- Natural approaches reference use, technical approaches do not
What is a characteristic that is NOT used for classifying soil profiles according to the text?
What is a characteristic that is NOT used for classifying soil profiles according to the text?
Which of the following is true about the classification of soil series into reference soil groups?
Which of the following is true about the classification of soil series into reference soil groups?
Why are accessory or covarying characteristics important in the classification of objects?
Why are accessory or covarying characteristics important in the classification of objects?
What are the four basic components that make up soil composition?
What are the four basic components that make up soil composition?
What is one example of natural classification mentioned in the text?
What is one example of natural classification mentioned in the text?
Which factor is NOT considered one of the five soil forming factors mentioned in the text?
Which factor is NOT considered one of the five soil forming factors mentioned in the text?
Which principle involves organizing soil knowledge based on specific objectives?
Which principle involves organizing soil knowledge based on specific objectives?
What percentage of the ideal soil is typically composed of minerals?
What percentage of the ideal soil is typically composed of minerals?
Where is the organic matter content usually much lower than 5% according to the text?
Where is the organic matter content usually much lower than 5% according to the text?
What is the main focus of technical soil classifications?
What is the main focus of technical soil classifications?
Which classification system groups soils based on their development pathway?
Which classification system groups soils based on their development pathway?
Which of the following factors can alter the volume of the pore space in soil?
Which of the following factors can alter the volume of the pore space in soil?
What component of soil composition is found in the pore spaces between solid soil particles?
What component of soil composition is found in the pore spaces between solid soil particles?
What is the main focus of the Principle of Certainty?
What is the main focus of the Principle of Certainty?
Which classification system is specifically mentioned in the text as related to suitability classes?
Which classification system is specifically mentioned in the text as related to suitability classes?
What is the characteristic composition of silicate minerals in soils?
What is the characteristic composition of silicate minerals in soils?
What happens to the charge on particles under moderately acid conditions?
What happens to the charge on particles under moderately acid conditions?
How does the pH affect the charge on colloidal particles?
How does the pH affect the charge on colloidal particles?
What is the most common element found in the Earth's crust after oxygen?
What is the most common element found in the Earth's crust after oxygen?
Which process involves the attachment of H+ ions to surface OH groups under more acidic soil conditions?
Which process involves the attachment of H+ ions to surface OH groups under more acidic soil conditions?
What type of bonding holds Si and Al atoms together with O2 atoms in clays?
What type of bonding holds Si and Al atoms together with O2 atoms in clays?
What is the role of fungi in the soil ecosystem?
What is the role of fungi in the soil ecosystem?
Which of the following microfungi are mentioned as helpful in the preservation of organic materials in the soil?
Which of the following microfungi are mentioned as helpful in the preservation of organic materials in the soil?
What is the characteristic smell associated with actinomycetes in a freshly ploughed field?
What is the characteristic smell associated with actinomycetes in a freshly ploughed field?
Which microorganism is particularly abundant in soils rich in decomposed organic materials?
Which microorganism is particularly abundant in soils rich in decomposed organic materials?
How do algae contribute to soil conservation?
How do algae contribute to soil conservation?
Which of the following microfungi thrive by having a mutual relationship with plants?
Which of the following microfungi thrive by having a mutual relationship with plants?
