Physical and chemical processes determining soil organic matter dynamics in a managed vertisol in a tropical dryland area

Hidalgo, Claudia; Merino, Agustı́n; Osorio-Hernández, Victorino; Etchevers, J.; Figueroa, Benjamin; Limón-Ortega, Agustín; Aguirre, Eduardo Acuña

doi:10.1016/j.still.2019.104348

Cited by 16 publications

(5 citation statements)

References 58 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…CA had beneficial effects on soil health, especially higher SOM and nitrate and S concentrations in the upper soil layer (Figure 2) and a higher aggregate stability (Figure 5). SOM, soil nitrogen, and soil aggregation are strongly linked, and it is to be expected that all three are impacted together, as SOM contains organic nitrogen and soil aggregates physically protect SOM, which binds together the aggregates and increases stability (Hidalgo et al, 2019;Six, Conant, Paul, & Paustian, 2002). Furthermore, several factors lead to higher aggregate stability in CA, including reduced breakdown due to reduced physical disturbance, reduced slaking due to protective residue cover, and increased soil macrofauna and mycorrhizal hyphae (Verhulst et al, 2010).…”

Section: Discussionmentioning

confidence: 99%

Effects of conservation agriculture on physicochemical soil health in 20 maize‐based trials in different agro‐ecological regions across Mexico

et al. 2021

View full text Add to dashboard Cite

Maize (Zea mays L.) is Mexico's primary staple food, but the Country's degrading soils and climate variability limit its productivity. Conservation agriculture (CA), a management technique that combines minimal tillage, permanent soil cover, and crop diversification, could reduce soil degradation and help improve soil health. There is however a lack of information about the effects of CA on soil health in the diverse agroecological conditions in Mexico. This study reports results of a field trial network established to adapt CA to Mexico's diverse cropping systems and local conditions.Physicochemical soil health, also referred to as soil quality, was studied in 20 trials in agro-ecologies ranging from handplanted traditional systems to intensive irrigated systems, initiated between 1991 and 2016. Soil in CA was compared to the local conventional practice (CP), which commonly involves tillage, residue removal, and continuous maize production. Across the sites, organic matter and nitrates were higher in the top (0-5 cm) layer of soil and soil aggregate stability was greater under CA than under CPs. For other soil health parameters, such as nutrient content, pH or penetration resistance, the effects of management varied widely across sites and soil types

show abstract

Section: Discussionmentioning

confidence: 99%

Effects of conservation agriculture on physicochemical soil health in 20 maize‐based trials in different agro‐ecological regions across Mexico

et al. 2021

View full text Add to dashboard Cite

show abstract

“…The relatively lowest organic matter contents in terraces and cultivated land (especially the latter) may be related to over-tillage. In the early stage of the soil-forming process, it is mainly organic matter that is adsorbed on mineral surfaces, whereas tillage accelerates the decomposition of organic matter (Hidalgo et al, 2019). The intensity of tillage is greater in cultivated land than in terraces.…”

Section: Biogeochemical Cycle Under Different Land Use Typesmentioning

confidence: 99%

Structure and biogeochemical process of microaggregates in a water source area of China’s South-to-North Water Diversion Project according to different land use types

Guo

Shang

et al. 2023

Front. Environ. Sci.

View full text Add to dashboard Cite

Soil biogeochemical processes have the potential to impact water quality in source areas of water diversion projects. This study aimed to explore the differences in biochemical processes and mechanisms at the microaggregate scale for different land use types in the water source area of China's Middle Route of the South-to-North Water Diversion Project. The study compared four typical land use types—forests, shrublands, terraces, and cultivated land—by characterizing the microaggregates using various analytical techniques, including scanning electron microscopy (SEM), SEM-EDS plane scan analysis, X-ray diffraction (XRD), X-ray fluorescence (XRF) spectroscopy, and Fourier transform infrared (FTIR) spectroscopy. Microaggregates from forests and shrublands had a flocculent spatial structure, while those from terraces had a nondirectional plate-like spatial structure, and those from cultivated land had a laminar spatial structure. Additionally, elements such as Mg, Al, and Fe were enriched in clay particles when combined with microaggregates. The mineral composition of clay varied significantly between different land use practices, with illite, chlorite, anorthite, albite, and quartz present in higher proportions in terraces and cultivated land than in forests and shrublands. Moreover, the contents of transitional elements such as Ti, Fe, Zn, Y, and Zr increased with each successive land use practice. Soil organic matter (SOM) was observed to decline in the order of forest > shrubland > terraces > cultivated land. Over-tillage appeared to be the primary mechanism of organic matter loss due to long-term tillage. The results of this study provide valuable insights into soil erosion and chemical transport dynamics. The mineral composition and spatial structure of microaggregates are important determinants of soil biochemical processes and mechanisms, which can influence water quality. The findings suggest that forest and shrubland management practices may be more conducive to maintaining soil health and water quality in source areas of water diversion projects.

show abstract

“…Soil organic carbon is also an indicator of soil quality (Kust et al, 2017). Studies show that soil conservation practices increase the capacity for long-term C sequestration (Hidalgo et al, 2019). Long-term fertilization with N, P, and K fertilizers (NPK) and combined manure (M) signi cantly increases the quantity of soil organic matter (Yang et al, 2011).…”

Section: Soil Organic Carbon Densitymentioning

confidence: 99%

Land Degradation Neutrality Assessment Using Geospatial Techniques in North Wello Zone, Northern Ethiopia

Tessera

Zeleke

Mersha

2021

Preprint

View full text Add to dashboard Cite

Background: Land degradation is increasingly recognized as a serious, nationwide environmental concern in Ethiopia. The key concern is the iterative relationship between land degradation, climate change and agriculture, exacerbating one another via negative and positive feedback loops. Due to the need for an efficient response to land degradation in the country, different sustainable land management practices have been implemented since the late 1980s. In Ethiopia, most of the previous researches were conducted on analyzing the determinants of decisions to implement land management practices. The objective of this study was to analyze land degradation neutrality status using remote sensing data in the study area. Results: We have studied the land degradation neutrality conditions of North Wello Zone by using indicators data, namely land cover change, land productivity dynamics and soil organic carbon stock. The areas of settlement consistently expanded at the fifth speed (2010-2018) from 1995 to 2010. Between 1995 and 2010, forestland declined by 18 percent, while it indicated an increasing trend of 26.8 percent from 2010 to 2018. The wetlands declined by 21.98 percent from 1995 to 2010; whereas zero net degradation was observed from 2010 to 2020. In addition, between 1995 and 2010, cropland and grassland showed an increasing trend but decreasing trends were detected between 2010 and 2018. Land productivity potential assessment results indicate that 52.8 percent of the total area is stable and characterized by a less stressed land productivity status. Approximately 22.7 percent of the land showed an increase in land productivity status from 2001 to 2018. The results also indicated that 19.64 percent of the land shows an early sign of decline or actual land productivity decline. 3.5 percent of land also shows a decline in productivity. The soil organic carbon is comparatively abundant in the high and midland vegetation areas but very thin in lowland areas.Conclusion: Most of the highland and midland parts of the study areas are stable and increasing land productivity condition with high biomass and soil organic content. However, most lowland areas showed a decline land productivity condition.

show abstract

Physical and chemical processes determining soil organic matter dynamics in a managed vertisol in a tropical dryland area

Cited by 16 publications

References 58 publications

Effects of conservation agriculture on physicochemical soil health in 20 maize‐based trials in different agro‐ecological regions across Mexico

Effects of conservation agriculture on physicochemical soil health in 20 maize‐based trials in different agro‐ecological regions across Mexico

Structure and biogeochemical process of microaggregates in a water source area of China’s South-to-North Water Diversion Project according to different land use types

Land Degradation Neutrality Assessment Using Geospatial Techniques in North Wello Zone, Northern Ethiopia

Contact Info

Product

Resources

About