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10 questions from this quiz
Minerals, organic matter, water, air
Plants cannot absorb N2N_2N2 directly
Rhizobium bacteria
40%40\%40% sand, 40%40\%40% silt, 20%20\%20% clay
Low fertility levels
High plasticity
Loam soils
A horizon
Component of chlorophyll for photosynthesis
Involved in energy transfer processes
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