Soil Organic Matter Content and Composition as Related to Ley Clipping Management and Fertilization
1970
Tan, K. H. | Edwards, J. H. | Beaty, E. R. | McCreery, R. A.
Soil organic matter content' and composition, with particular attention to C/Pₒᵣg and C/N relationship, were investigated under clipping and fertility treatments applied to Pensacola bahiagrass (Paspalum notatum, Flugge) grown on a Eustis loamy sand. The results indicated that soil organic matter accumulation was influenced by the interaction of nitrogen fertilization and clipping management. Nitrogen fertilization alone had some effect, whereas clipping only had no influence on the organic C content of the surface soil. The C/N ratio decreased with depth in the profile with weekly clipping, but remained relatively constant from the surface to 30–40 cm depth with monthly clipping intervals. The C/Pₒᵣg ratio in the surface soil increased with increasing N-fertilization as well as by monthly and 6-weeks clippings. The effect of interaction of N-fertilization and clipping frequency on the C/Pₒᵣg ratio was greater than the influence of clipping frequency or N-fertilization alone. The C/Pₒᵣg ratio of the subsoil was unaffected by either.
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