Topsoil (horizon A):Very rich in humus(dead organic matter like plants) and minerals.
Subsoil (horizon B):less rich in humus and minerals
Weathered Rock (horizon C):Little or no plant life due to it being all rock
Hope this helps :)
This technique is called cystoureterography
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Answer:
Most food modifications have primarily focused on cash crops in high demand by farmers such as soybean, corn, canola, and cotton. Genetically modified crops have been engineered for resistance to pathogens and herbicides and for better nutrient profiles.
Explanation:
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Polar Bears International (PBI)