Question

The application of raw, uncomposted poultry manure in cotton fields can sometimes cause severe 'Nitrogen Drawdown' (immobilization) because poultry manure has a?

A Very high Carbon to Nitrogen (C:N) ratio (e.g., 80:1)
B Very low Carbon to Nitrogen (C:N) ratio (e.g., 5:1)
C High concentration of heavy metals
D High concentration of uric acid
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