ปัญหา 2เลือกประเภทWhich soil layer is known as the top layer of soil, where organic matter is most abundant?C HorizonB HorizonA HorizonO Horizon
ปัญหา 3เลือกประเภทWhat is the primary composition of the B Horizon in soil?Organic matterMineralsAir and waterSand and silt
ปัญหา 4เลือกประเภทWhat is the main characteristic of the C Horizon in soil?Weathered rockRich organic materialsHigh nutrient contentClay and minerals
ปัญหา 5เลือกประเภทWhich soil layer is typically referred to as 'topsoil'?C HorizonB HorizonA HorizonO Horizon
ปัญหา 6เลือกประเภทHow does soil texture affect plant growth?It does not affect growthIt influences water retention and nutrient availabilityIt only affects the color of the soilIt determines the type of plants that can grow
ปัญหา 7เลือกประเภทWhat role does the O Horizon play in the ecosystem?It prevents erosionIt stores waterIt contains mineralsIt supports biodiversity
ปัญหา 8เลือกประเภทWhat process leads to the formation of soil layers over time?Soil formationErosionSedimentationPollution
ปัญหา 9เลือกประเภทWhich of the following best describes the properties of clay soil?Good drainage and low nutrient retentionHigh permeability and low water retentionHigh water retention and low drainageLow fertility and high aeration
ปัญหา 10เลือกประเภทIn which layer would you primarily find decomposed organic matter?B HorizonC HorizonA HorizonO Horizon
ปัญหา 11เลือกประเภทWhich soil layer is most likely to experience leaching?C HorizonA HorizonB HorizonO Horizon