Answers are grounded in this paper and cite their sources.
Virgin soils and their long‐time cropped counterparts were hydrolyzed with HCl. The N separated into three fractions. The proportion of N that each N fraction contributed to the total N was altered when comparisons were made between virgin soils and their cropped counterparts. Cultivation and cropping caused losses in all three N fractions, however, the nondistillable acid‐soluble N fraction lost a greater proportion of its N than did the other two fractions.
No takes yet. Share an insight, caveat, or question.
Porter et al. (1964) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: