What is the purpose of soil classification?
Sorting soils to better understand and use them.
What are the physical properties used in soil classification?
What are the chemical properties considered in soil classification?
What are the formation factors in soil classification?
What are the use and behavior factors in soil classification?
Why classify soils for agriculture?
To choose the right crops for the soil.
Why classify soils for engineering?
To know if soil is strong enough to build on.
Why classify soils for conservation?
To prevent erosion and land degradation.
What is the U.S. Soil Taxonomy?
A system that classifies soils into 12 major soil orders.
What are the key features of Entisols?
Young soils with little development; found in riverbanks and floodplains.
What are the key features of Inceptisols?
Slightly developed, young soils; found in hills and forested slopes.
What are the key features of Ultisols?
Highly weathered, acidic soils; found in tropics and needs fertilization.
What are the key features of Andisols?
Soils formed from volcanic ash; very fertile and good for farming.
What are the key features of Vertisols?
Where are Vertisols commonly used?
What are the characteristics of Oxisols?
Where are Oxisols typically found?
What is a characteristic of Cambisols?
What defines Ferralsols?
What are Gleysols known for?
What is the first step in soil classification?
Observe the soil profile (layers/horizons)
What does soil texture affect?
Why is color important in soil classification?
Indicates organic matter or minerals
How does pH affect soil?
Affects nutrient availability
What does soil structure determine?
How air and water move
What soil property indicates how soil has developed over time?
Depth & layers
What does soil classification help us understand?
What factors are used for soil classification in the Philippines?
What are the major soil orders in the Philippines?
What is a characteristic of Ultisols?
Where are Ultisols commonly found in the Philippines?
What is a characteristic of Inceptisols?
Young soils with some horizon development
What type of soil is found in hilly areas and upland farming zones?
Moderately fertile soil, used for vegetables, corn, and root crops.
Where are Entisols commonly found?
Along riverbanks and coasts, such as Cagayan Valley and Pampanga River basin.
What crops are grown in Entisols?
Rice, sugarcane, and other irrigated crops.
What is a key characteristic of Vertisols?
High in clay that expands and cracks, making it hard to manage when dry or wet.
Where can Vertisols be found?
In Cotabato Valley and parts of Isabela.
What crops are typically grown in Vertisols?
Rice, corn, and pasture.
What are Andisols formed from?
Volcanic ash, making them very fertile and well-drained.
Where are Andisols commonly found?
In Mount Mayon area, Laguna, and Bukidnon.
What high-value crops are grown in Andisols?
Pineapple, banana, and vegetables.
What are Oxisols characterized by?
Very old and weathered soils with low fertility, often found in tropical rainforests.
Where are Oxisols found?
Parts of Mindanao and Palawan.
What is the common use of Oxisols?
Forestry or with heavy fertilization.
What is Luisiana Clay?
Red clay soil that is well-drained, used for coconut and pineapple.
What is Guimbalaon Clay Loam known for?
Loamy soil with good fertility, used for rice, corn, and vegetables.
What are the key features of Entisols?
Young soils with little development; found in riverbanks and floodplains.
What are the key features of Inceptisols?
Slightly developed, young soils; found in hills and forested slopes.
What are the key features of Ultisols?
Highly weathered, acidic soils; found in tropics and needs fertilization.
What are the key features of Andisols?
Soils formed from volcanic ash; very fertile and good for farming.
What does soil classification help us understand?
What factors are used for soil classification in the Philippines?
Where are Ultisols commonly found in the Philippines?
What type of soil is found in hilly areas and upland farming zones?
Moderately fertile soil, used for vegetables, corn, and root crops.
Where are Entisols commonly found?
Along riverbanks and coasts, such as Cagayan Valley and Pampanga River basin.
What is a key characteristic of Vertisols?
High in clay that expands and cracks, making it hard to manage when dry or wet.
What are Oxisols characterized by?
Very old and weathered soils with low fertility, often found in tropical rainforests.
What is Guimbalaon Clay Loam known for?
Loamy soil with good fertility, used for rice, corn, and vegetables.
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