Distribution and amount of soil organic C in long-term management systems in Texas

Soil organic carbon (SOC) distribution is altered by residue management practices, but the effect on total C mass is not well understood, especially in warm regions. The objective of this study was to determine the effect of residue management practices on SOC distribution and amount across an 1100...

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Bibliographic Details
Published in:Soil & tillage research 1998-07, Vol.47 (3), p.309-321
Main Authors: Potter, K.N, Torbert, H.A, Jones, O.R, Matocha, J.E, Morrison, J.E, Unger, P.W
Format: Article
Language:English
Subjects:
Agronomy. Soil science and plant productions
APLICACION DE ABONOS
Biological and medical sciences
CARBON
Carbon sequestration
CARBONE
CARBONO
CERO-LABRANZA
Chemical, physicochemical, biochemical and biological properties
CLIMA
CLIMAT
CLIMATE
CONDUITE DE LA CULTURE
CROP MANAGEMENT
CROP RESIDUES
FERTILISATION
FERTILIZER APPLICATION
Fundamental and applied biological sciences. Psychology
MANEJO DEL CULTIVO
MATERIA ORGANICA DEL SUELO
MATIERE ORGANIQUE DU SOL
No-till
NON TRAVAIL DU SOL
Organic matter
Physics, chemistry, biochemistry and biology of agricultural and forest soils
RESIDU DE RECOLTE
RESIDUOS DE COSECHAS
ROTACION DE CULTIVOS
ROTATION CULTURALE
ROTATIONAL CROPPING
SOIL ORGANIC MATTER
Soil science
TEXAS
ZERO TILLAGE
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Summary:Soil organic carbon (SOC) distribution is altered by residue management practices, but the effect on total C mass is not well understood, especially in warm regions. The objective of this study was to determine the effect of residue management practices on SOC distribution and amount across an 1100 km transect (northwest to southeast) of Texas. Long-term (>10 years) continuous cropping rotation and residue management plots located near Bushland, Temple, and Corpus Christi, Texas, were sampled incrementally with depth for SOC distribution and mass. The mass of SOC varied among locations depending on management, and climatic conditions. No-tillage management resulted in increased SOC concentration and mass in the surface 0.07 m in comparison to more intensive tillage management (e.g., sweep, chisel plow, moldboard plow). Fertilization had little effect on C sequestration at any site. Carbon sequestration decreased as mean annual temperature increased. Carbon may be sequestered in soil under Texas climatic conditions, but the amounts may be quite small.
ISSN:0167-1987
1879-3444
DOI:10.1016/S0167-1987(98)00119-6