Institutional landmarks in Brazilian research on soil erosion: a historical overview

Telles, Tiago Santos; Dechen, Sônia Carmela Falci; Guimarães, María de Fátima

doi:10.1590/s0100-06832013000600001

Cited by 13 publications

(7 citation statements)

References 9 publications

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“…The main consequences of erosion are losses of water, soil, OM, nutrients and the costs generated (Pimentel et al, 1995;Telles et al, 2011;Telles et al, 2013a). The study of this phenomenon is of utmost importance, since freshwater is a scarce natural resource and that the gradual losses of soil can turn it into an unproductive land (Pimentel et al, 1995;Lal, 1998;Den Biggelaar et al, 2003a, b).…”

Section: Introductionmentioning

confidence: 99%

Perdas e custos associados à erosão hídrica em função de taxas de cobertura do solo

et al. 2015

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The aim of this study was to estimate water erosion costs associated with nutrient losses in four different rates of artificial cover. The experiment was carried out from 1987 to 1996 in runoff plots to measure soil losses in Campinas, State of Sao Paulo, in an Ferralsol under natural rainfall. The experimental design was completely randomized, with four treatments (0%, 24%, 40% and 90% artificial cover) and three replications. To estimate costs, P, K + , Ca 2+ and Mg 2+ concentrations in runoff water and soil removed by erosion were summed up, converted into triple superphosphate, potassium chloride and dolomitic limestone and multiplied by their respective market prices. The results indicate that, under the experimental conditions, the greater the percentage of soil cover, the lower the losses of water, soil, organic matter and nutrients. The soil with 90% cover presented reduction of 51.97% in average water losses, 54.44 in soil losses and 54.91% in organic matter losses than the treatment with 0% cover. In bare soil, losses were estimated at 16% P 2 O 5 and 8% KCl in terms of the amount of fertilizers recommended. Costs varied from US$ 107.76 ha -1 year -1 in bare soil (0% cover) to US$ 18.15 ha -1 year -1 in soil with 90% cover. With these values, losses were estimated at 616.5 million tons of soil per year for Brazil, as a result of soil erosion in annual crops, and cost of this process is around US$ 1.3 billion per year.

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Section: Introductionmentioning

confidence: 99%

Perdas e custos associados à erosão hídrica em função de taxas de cobertura do solo

et al. 2015

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“…This fact highlights the importance of maintaining and preserving the topsoil, the most active soil layer and susceptible to degradation due to poor soil management. This shows the importance of NT in Brazil since its introduction in the 1970s, reducing and controlling erosion and the loss of soil, nutrients, and water (Telles et al 2013).…”

Section: Effect Of Tillage Systems On C Accumulationmentioning

confidence: 88%

Soil organic matter fractions in an Oxisol under tillage systems and winter cover crops for 26 years in the Brazilian subtropics

Conceição

Casali

Canalli³

et al. 2022

Bragantia

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The improvement of carbon (C) accumulation in soils has been one of the main purposes of the conservation systems in agricultural production. This study aimed to assess the long-term effect of conventional tillage (CT) and no-tillage (NT) combined with winter cover crops, black oat and oilseed radish, and fallow on C accumulation and stabilization in a very clayey Oxisol in Southern Brazil. Soil samples were collected in the 0-0.05, 0.05-0.10 and 0.10-0.20 m layers of a 26-year-old experiment. Distribution of size-class aggregates, C stock in aggregates, total C stock, and C stocks in the physical fractions, free particulate organic matter (free-POM), occluded particulate organic matter (occluded-POM) and mineral-associated organic matter (min-OM) were assessed. NT had a higher percentage of macroaggregates and C stock in this size-class, and also higher C stock in bulk soil, free-POM and occluded-POM fractions than CT in 0-0.05 m (Tukey's test p < 0.05), due to higher input of biomass and minimum soil mobilization in NT. Oat and radish had higher C stock in macroaggregates than fallow in 0.05-0.10 m (Tukey's test p < 0.05). Radish had the highest C stock in the free-POM (0-0.05 m). Fallow decreased the stabilization of macroaggregates and C accumulation in free-POM, due to the lower C input from aboveground biomass over the years. In conclusion, NT after 26 years improved C accumulation and stabilization, mainly in the superficial layer and in POM fractions, and winter cover crops favored the formation and stability of macroaggregates.

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“…In the early 1970s, soil conservation practices were adopted in Brazil to control and reverse soil erosion and degradation issues, including no-tillage -NT [1,2]. NT emerged as an alternative to the conventional tillage, which involved plowing and harrowing and left the soil exposed and vulnerable to the erosion process [3].…”

Section: Introductionmentioning

confidence: 99%

No-Tillage and Conservation Agriculture Adoption by Farmers in Southern Brazil

Mantovani,

Pellini,

Bordin

et al. 2024

Braz. arch. biol. technol.

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Brazil, the development of a strong technical foundation for soil and water conservation has made no-tillage (NT) the leading method for preparing land for temporary crops. Despite this, there's insufficient information regarding the extent to which farmers have adopted NT and conservation agriculture (CA) and the distribution and evolution of these practices within Paraná-a state at the forefront of NT and CA implementation. This study investigates the adoption rates of NT and CA among Paraná's farmers, focusing on temporary crops. It utilizes specialized data from the Brazilian Institute of Geography and Statistics' agricultural censuses of 2006 and 2017. Adoption rates for NT and CA were determined by comparing their proportions in both the number of farming properties and the overall land area devoted to temporary crops across various microregions. Findings indicate a rise in the adoption of NT from 68.5% to 78.9% and CA from 14.6% to 27.7% over the 2006 to 2017 period. Moreover, adoption rates varied across the 39 microregions, with the highest rates in regions dominated by temporary crops, particularly soybeans, maize, and wheat. Conversely, the lowest adoption rates were found in microregions where permanent crops and pastures prevailed, and sugarcane, cassava, and rice were the primary temporary crops.

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Institutional landmarks in Brazilian research on soil erosion: a historical overview

Abstract: SUMMARY

Cited by 13 publications

References 9 publications

Perdas e custos associados à erosão hídrica em função de taxas de cobertura do solo

Perdas e custos associados à erosão hídrica em função de taxas de cobertura do solo

Soil organic matter fractions in an Oxisol under tillage systems and winter cover crops for 26 years in the Brazilian subtropics

No-Tillage and Conservation Agriculture Adoption by Farmers in Southern Brazil

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