Farm systems, soil chemical properties, and clay dispersion in watershed áreas
Amanda Letícia Pit Nunes,Glassys Louise de Souza Cortez,Thadeu Rodrigues de Melo,Alex Figueiredo,Cassio Alexandre Rolan Wandscheer,Jeankleber Bortoluzzi,George G. Brown,Marie Luise Carolina Bartz,Ricardo Ralisch,Maria de Fátima Guimarães +9 more
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TLDR
In this article, the effect of different farm systems on clay dispersion and its relationship with soil chemical properties and the no-tillage system participatory quality index (IQP), in watershed areas in the west of the state of Parana, Brazil, were evaluated.Abstract:
The objective of this work was to evaluate the effect of different farm systems on clay dispersion and its relationship with soil chemical properties and the no-tillage system participatory quality index (IQP), in watershed areas in the west of the state of Parana, Brazil. The farm systems evaluated were: no-tillage; no-tillage with crop succession; no-tillage with soil disturbance; and conventional system. In addition, the farm systems were evaluated for their IQP. Soil samples were collected at 0.0-0.20-m soil depth, in 40 agricultural areas and in 6 native forests considered as references. The degree of clay dispersion, total organic carbon, pH (CaCl2), exchangeable potassium (K+), available phosphorus (P), exchangeable calcium and magnesium (Ca2++Mg2+), and potential acidity (H+Al3+) were determined. A linear multiple regression model was fitted by the method of least squares. The averages of clay dispersion degree per watershed were compared at 5% probability. The farm systems were compared by Scott-Knott’s test. Soil chemical properties showed a higher influence on clay dispersion than the different farm systems assessed. The no-tillage system alone showed the highest content of organic carbon, which was similar to those of the native areas. The conventional system and the no-tillage system with soil disturbance showed a lower IQP and a higher degree of clay dispersion than the areas with the no-tillage system alone. The IQP allows distinguishing the conventional system from the no-tillage system.read more
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Adoption of the no-tillage system in Paraná State: A (re)view
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TL;DR: In this article, the authors identified appropriate soil quality indicators from factor analysis (FA) of five treatments: no-till corn (Zee mays) without manure (NT), NO-Till corn with manure (NM), NOTILL corn with NTR, conventional tillage corn (CT), and meadow (M) in Coshocton, Ohio.
Journal ArticleDOI
Three decades of soil microbial biomass studies in Brazilian ecosystems: Lessons learned about soil quality and indications for improving sustainability
TL;DR: In this paper, the benefits of no-tillage in preserving MB-C and reducing metabolic quotient (qCO2) in comparison to conventional tillage were evaluated.
Journal ArticleDOI
Soil structure and its influence on microbial biomass in different soil and crop management systems
Adriana Pereira da Silva,Letícia Carlos Babujia,Julio Cezar Franchini,Ricardo Ralisch,Mariangela Hungria,Maria de Fátima Guimarães +5 more
TL;DR: In this paper, the authors quantify homogeneous morphological units (HMUs) in dystroferric Red Latosol, in a 22-year experiment with treatments consisting of a no-tillage planting system (NT), no-thresholding with chiseling every 3 years (NTC), and conventional tillage (CT), using crop rotation (CR) [with five different crop species in 3 years] and succession systems (CS) [only two crop species].
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