The ____ horizon extends to the underlying bedrock, and consists of mineral particles and rock fragments but generally no organic material?
A) A
B) B
C) C
D) D
E) O
Correct Answer:
Verified
Q17: The nutrients that a plant needs for
Q18: What macronutrient is rarely deficient?
A) carbon
B) hydrogen
C)
Q19: What element is considered an essential macronutrient
Q20: Which element is considered an essential micronutrient
Q21: The _ horizon is usually light in
Q23: Scientists are attempting to genetically modify rice
Q24: Soil mineral particles that range from 0.02-0.002
Q25: The surfaces of clay particles in soil
Q26: The soils in which most plants do
Q27: Research in Colorado's San Juan Mountains has
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