Abstract
The integrated study of soil properties allows the establishment of appropriate management practices in the Brazilian Semi-arid region. This study aimed at evaluating the physical and chemical attributes in Neosols under different agricultural uses in different landscape positions. The evaluations were carried out in five areas in the city of Martins, RN: Consortium of corn/bean/cassava (CON), monoculture of corn (MM) and banana (BN) all in Lithic Neosol; monoculture of sugarcane (SC) and elephant grass (EG) in Fluvic Neosol and native forest area (NF). For chemical and physical analysis, samples were collected from layers of 0.00-0.10, 0.10-0.20 and 0.20-0.30 m. Data were analyzed using multivariate analysis. The main results of the principal components analysis, CP1, CP2, CP3 and CP4, explained 87.16% of data variance: CP1 represented by pH and exchangeable cations (Ca2+, Mg2+), base saturation (SB), and the contrast represented by the potential acidity (H+Al) and aluminum (Al3+). In CP2 electrical conductivity (EC), sodium (Na+), aluminum (Al3+) and acidity by aluminum (m) were responsible for the differentiation of uses, highlighting the importance of maintaining crop residues as responsible for the reduction of exchangeable Al3+ content and the increase in pH and release of exchangeable bases. It is concluded that agricultural systems that favored the maintenance of the total organic carbon were the grass-Elephant grass (EG), followed by the consortium of corn, beans and cassava (CON). The attributes (pH, Ca2+ and Mg2+), sum of bases (t, V, EG, Na+ and PST) were indicators of separation of environments, and the most sensitive (Al3+and H+Al). The chemical attributes in agricultural uses of banana monoculture (BN), consortium of corn, beans and cassava (CON), monocultures of Elephant grass (EG) and native forest (NF) had stood, reflecting higher weights in module, following the order of importance of the components: CP1>CP2>CP3>CP4. Key words: Landscape, consortium, multivariate, soil management.
Highlights
IntroductionThe location of soils in the landscape, different systems of agricultural use and soil management are considered to be the main tools for changing its composition and structural arrangements
Among the different factors that influence the spatial variability of soil attributes, the position of terrain in the landscape stands out for being a characteristic that controls the routes preferred by water
Analyzing systems of agricultural use in the semi-arid region of Brazil, Marinho et al (2016), found that the soil under agro-ecological areas (AGA) was less damaging to recalcitrant soil organic material fractions, with it being of a similar condition to that of native scrub (NSA), and obtaining higher levels of C-Hum humin carbon and C-FV fulvic acid carbon, unlike systems with intensive soil preparation
Summary
The location of soils in the landscape, different systems of agricultural use and soil management are considered to be the main tools for changing its composition and structural arrangements. Alterations resulting from inappropriate use of natural resources are normally compared to areas with less human interference and that are used as a reference. This includes the removal of original vegetation and the planting of crops, together with intensive soil preparation practices, which cause break ups in soil-plant-atmosphere stability (Bargali et al, 1992, 1993a, b; Bargali, 1996; Joshi et al, 1997). It was found that plant diversity in the systems is positively reflected in the maintenance and/or improvement of soil productive capacity, and connected to root growth and the permanence of residual vegetation on the surface (Padalia et al, 2015; Parihaar et al, 2015)
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Journal of Soil Science and Environmental Management
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
