Miguel Cooper

Universidade de São Paulo

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Pablo Vidal‐Torrado

Universidade de São Paulo

Laura Fernanda Simões da Silva

Universidade Federal de São Carlos

Renata Cristina Bovi

Universidade Estadual Paulista (Unesp)

Raquel Stucchi Boschi

Universidade Federal de São Carlos

Raul Shiso Toma

Universidade Federal do Ceará

Gerd Sparovek

Universidade de São Paulo

Ricardo Ribeiro Rodrigues

Universidade de São Paulo

Jaqueline Dalla Rosa

Universidade Federal do Sul da Bahia

Simone Di Prima

University of Basilicata

João Carlos Medeiros

Universidade Federal do Sul da Bahia

Cooperative Institutions

Universidade de São Paulo

164

Brazilian Agricultural Research Corporation

Forest Science and Research Institute

Methodist University of Piracicaba

Universidade Estadual Paulista (Unesp)

Universidade Estadual de Campinas (UNICAMP)

Universidade Federal do Paraná

Secretaria de Agricultura e Abastecimento

Universidade Metodista de São Paulo

Universidade Brasil

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Environmental impact of the Brazilian Agrarian Reform process from 1985 to 2001

Scientia Agricola (2006)

J.A. van de Steeg Gerd Sparovek S. B. L. Ranieri Rodrigo Fernando Maule Miguel Cooper

During the past 20 years, most settlements of the Brazilian Agrarian Reform (AR) have been established in or near better-preserved natural ecosystems, where environmental impact is likely to be negative and contribute to natural resources degradation. The objective of this work is providing a first, comprehensive insight of the impacts related to the environmental quality of these settlements, based on the primary survey of 4,340 AR settlements installed between 1985 and 2001. An index was calculated to integrate different aspects of environmental impacts in one single number. The index showed significant regional variation, with lower values (low environmental quality) for the North and Northeast of Brazil, intermediate values for the Central-west and Southeast, and high values for the South. Environmental impacts resulting from AR and settlement creation are slowly decreasing with time, but are still very high in absolute values. The lack of protection of riparian areas, cultivation of legal reserves, and deforestation, are the main concerns related to environmental impacts.

Human settlement

Deforestation

Environmental Quality

Environmental degradation

Agrarian Reform

Settlement (finance)

10.1590/s0103-90162006000200010

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Condition of the soil resource and provision of ecosystem services from a Brazilian Oxidic soil under conventional and integrated livestock-based systems

Journal of New Zealand Grasslands (2023)

Gustavo Pereira Valani Aline Fachin Martíni José Ricardo Macedo Pezzopane A. C. de C. Bernardi P. P. A. Oliveira

Integrated crop-livestock-forest systems promote soil health and deliver more ecosystem services (ES) compared to conventional livestock systems, although most studies on the subject poorly describe the soil component of these systems. This preliminary studyassessed the condition of the soil resource and its role in the provision of ecosystem services from a Brazilian Oxidic soil under conventional and integrated livestock-based systems. Five systems were studied from pasture only to partial and fully integrated croplivestock-forest systems. All are located on one of the Brazilian Agricultural Research Corporation (Embrapa) Research Farms. Data for the quantification of the soil resource and ES for each of these livestockbased systems were retrieved from previous studiesand used to quantify soil health, the provision of food and fibre and climate regulation, as well as report their impacts on receiving environment. Soil organic carbon content, a key component of soil health, was higher in the most integrated system. Soil-based grass yields were lower in integrated systems due to competition for resources from the trees or space taken by crops but had the highest overall provision of food and fibre. Carbon sequestration by trees in the integrated systems offsets enteric methane emissions from beef production, and this ES contributes to mitigating climate change. Future studies should include analysis of all the naturalresources and a wider range of soil-based ecosystem services, along with impacts on receiving environmentsto provide a more complete picture of the performance of integrated livestock-based systems.

Soil carbon

10.33584/jnzg.2023.85.3656

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Sediment Morphology, Distribution, and Recent Transport Dynamics in a Reforested Fragment

Figshare (2017)

Renata Cristina Bovi Laura Fernanda Simões da Silva Mariana Delgado Oliveira Zenero Camila Carolina de Carvalho Miguel Cooper

Abstract Erosion generates large amounts of sediment, which may be deposited at the site of origin, on the slope of a hill, or along waterways. The transportability of each type of sediment by runoff and its potential for subsequent deposition largely depends on its morphological features and particle size distribution. The aim of this study is to describe and characterize the morphology and micromorphology of sediments deposited in a reforested area and to understand the dynamics of the transport process. In order to understand the sedimentation processes, the following analyses were performed: particle size distribution, with and without the use of a dispersant solution; statistical analysis of the sand fraction using Folk and Ward parameters; sediment and soil micromorphology; and two-dimensional distribution and geometry of soil horizons and sediments. The sedimentation occurred in a localized and discontinuous manner and in the lowest parts of the landscape. The sediments were generated by low intensity erosive events producing well-sorted sediments and the clay in these deposits was transported mainly in the form of silt-sized clay aggregates. Microscopic analysis of the sediments was important for clarifying the genesis and transport dynamics of the sedimentary deposits.

Fragment (logic)

Morphology

Dynamics

10.6084/m9.figshare.5670724

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Stratigraphical discontinuities, tropical landscape evolution and soil distribution relationships in a case study in SE-Brazil

Revista Brasileira de Ciência do Solo (2002)

Miguel Cooper Pablo Vidal‐Torrado I. F. Lepsch

On a regional summit surface in the county of Piracicaba (SP) within the Peripheric Depression of São Paulo, formed of discontinued flattened tops, there is an abrupt transition between a Typic Hapludox and a Kandiudalfic Eutrudox, together with two stoneline layers. Using stratigraphical, mineralogical, and cartographic studies, this transition and the soil distribution of this surface were studied, correlating them with the different parent materials and the morphoclimatic model of landscape evolution in Southeastern Brazil. The Typic Hapludox was formed on a sandy Cenozoic deposit (Q) that overlies a pellitic deposit of the Iratí formation (Pi), representing a regional erosive discordance. Westwards to the Piracicaba River, this sequence is interrupted by a diabase sill overlain by a red clayey material which gave origin to the Kandiudalfic Eutrudox. Two post-Permian depositional events were identified by the two stonelines and stratigraphical discontinuities. The first event generated the deposition of a sandy sediment in the form of levelled alveoluses on regional barriers, most of these formed by dikes and diabase sills, probably during a drier phase. The second depositional event, leading to the deposition of the red clay was probably the dissection of the previously formed pediplane during a humid climate, followed by another pedimentation process during a later, drier period.

Deposition

Colluvium

10.1590/s0100-06832002000300012

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Caracterização do funcionamento do solo em sistemas agroextrativistas da amazônia oriental

Resumos (2012)

Mateus de Souza Macul Selene Cristina de Pierri Castilho Mariana D. N. Oliveira Miguel Cooper

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Evolução da porosidade do solo entre horizontes B nitico e B latossólico utilizando a técnica de análise de imagens

Miguel Cooper Pablo Vidal‐Torrado Marie-Paule Grimaldi Pierre Curmi

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Determination of soil pore size distribution and water retention curve by internal magnetic field modulation at low field 1H NMR

Geoderma (2023)

E. H. Novotny Eduardo R. deAzevedo Gustavo de Godoy Daniel Martelozo Consalter Miguel Cooper

The determination of the soil pore size distribution, water retention curve, and derived parameters that control important processes in soils, such as water supply for plants; infiltration; water and solute movement in soils; erosion; plant nutrients and contaminants transport, etc, are challenging and the available methods are expensive, time-consuming and prone to bias and errors. The use of 1H Nuclear Magnetic Resonance (NMR) relaxometry to characterise the soil porosity and hydraulic properties through spin-lattice and spin-spin relaxometry results in an ill-posed problem with two correlated unknown quantities: the pore length scales, and surface relaxivity. To overcome this limitation of NMR relaxometry, we propose the use of a method that directly accesses the NMR diffusion modes governed only by the pore size, and therefore, independent of the unknown surface relaxivity. The manuscript describes an unprecedent application in Soil Science of the Decay due to Diffusion in Internal Field (DDIF) method to successfully determine the pore size distribution of undisturbed soil samples, as well as to estimate the water retention curves from the pore size distribution.

Soil test

10.1016/j.geoderma.2023.116363

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Citations (22)

Dinâmica físico-hídrica de uma toposseqüência de solos sob Savana Florestada (Cerradão) em Assis, SP

Revista Brasileira de Ciência do Solo (2006)

Carlos Eduardo Pinto Juhász Patrícia Ribeiro Cursi Miguel Cooper Thalita Campos Oliveira Ricardo Ribeiro Rodrigues

Este trabalho teve como objetivo a caracterização morfológica e físico-hídrica de uma toposseqüência de solos sob floresta nativa de uma parcela permanente de 320 x 320 m, instalada na Estação Ecológica de Assis (SP). A vegetação da parcela consiste em um remanescente de Savana Florestada (Cerradão) da zona limítrofe sul do grande domínio do Cerrado. O estudo da geometria bidimensional (horizontal e vertical) dos horizontes em uma toposseqüência possibilitou o detalhamento da morfologia do solo. Para estudar a dinâmica da água no ambiente de desenvolvimento das plantas nativas, foram obtidas curvas de retenção, análise granulométrica e medidas de condutividade hidráulica saturada no campo, utilizando o permeâmetro de Guelph. O monitoramento da umidade do solo in situ, utilizando o sensor WCR, e da distribuição de chuvas foi realizado no período de novembro de 2003 a novembro de 2004. Os solos foram classificados de montante a jusante em Latossolo Vermelho, Latossolo Vermelho-Amarelo, Latossolo Amarelo e Gleissolo Háplico. O alto teor de argila no horizonte de subsuperfície do Gleissolo, em contraste aos Latossolos com maior teor de areia, determina menor drenagem, maior retenção hídrica e baixa condutividade hidráulica nesta camada, não atingindo a saturação em nenhum momento do ano monitorado. O comportamento físico-hídrico dos solos é influenciado pelas condições do relevo, evidenciado pela transição lateral contínua de cor, textura e estrutura dos solos na toposseqüência, e pela pluviosidade. Em superfície, ocorre uma oscilação da umidade do solo intimamente ligada a eventos chuvosos. Em subsuperfície, este efeito é menos intenso, sendo deslocado no tempo. A disponibilidade de água em toda a toposseqüência é limitada na estação seca e também em parte da estação úmida, o que deve definir as características florísticas da formação florestal da parcela e determinar a distribuição espacial do mosaico vegetacional.

10.1590/s0100-06832006000300002

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ESTRUTURA DO SOLO SOB FEIJÃO IRRIGADO E DIFERENTES MANEJO DO SOLO

Revista Brasileira de Ciência do Solo (2015)

Lorena Adriana de Gennaro Zigomar Menezes de Souza Laura Fernanda Simões da Silva Miguel Cooper Milton César Costa Campos

O manejo agrícola influencia a estrutura do solo, modificando os atributos físicos e o comportamento hídrico do solo. O objetivo deste trabalho foi avaliar os efeitos da semeadura direta (SD) e do preparo convencional (PC) sobre a estrutura do solo, por meio de atributos físicos e da distribuição dos poros, utilizando imagens digitais 2-D. O estudo foi realizado em um Latossolo Vermelho distroférrico com delineamento de blocos casualizados. A densidade do solo, macroporosidade, diâmetro médio ponderado (DMP), condutividade hidráulica do solo saturado (Kfs) e análise de imagens digitais 2-D (resolução de 156,25 μm2) foram avaliadas nas profundidades de 0-0,20 e 0,20-0,40 m. Os manejos não diferiram para a densidade e macroporosidade do solo. A SD revelou maior DMP e Kfs em relação ao PC. O PC apresentou maior área total de poros na profundidade de 0-0,20 m em relação ao SD, ocorrendo o inverso na profundidade de 0,20-0,40 m. A SD apresentou maior quantidade de poros complexos de tamanho grande (>0,156 mm2) na camada de 0,20-0,40 m em relação ao PC, que evidenciou predomínio de poros arredondados. A SD demonstrou melhorias na estrutura do solo em relação ao PC, com maior estabilidade dos agregados, condutividade hidráulica e área total de poros, contribuindo para a conservação do solo e da água em sistemas produtivos.

10.1590/01000683rbcs20140441

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Controlled traffic and soil physical quality of an Oxisol under sugarcane cultivation

Scientia Agricola (2015)

Gustavo Soares de Souza Zigomar Menezes de Souza Miguel Cooper Cássio Antônio Tormena

Machinery traffic in sugarcane (Saccharumsp.) plantations reduces soil physical quality, and hinders both root development and crop yield. We evaluated the physical quality of an Oxisol and the development of sugarcane roots under controlled traffic. The treatments assessed were: without controlled machinery traffic (WCT), controlled traffic by adjusting the tractor and infield wagons to a 3.0 m track width with the operator guiding the machinery (CT1) and the previous treatment using real time kinematic / global positioning system (RTK / GPS) precision auto steer (CT2). Soil samples were collected from the planting rows, seedbed and inter-row center to determine the least limiting water range (LLWR) and soil porosity from scanned 2-D images. The root dry mass was sampled from monoliths, separated from the soil by washing through a 2-mm sieve and dried in an oven. A higher LLWR was observed in the planting row under CT1 and CT2 than under WCT. The planting row had a predominance of complex pores with a diameter > 500 µm in the 0.15-0.27 m depth layer under CT1 and CT2. In the planting rows under WCT, the root dry mass was only 44 % of that measured under CT2. Benefits regarding soil physical quality and growth roots were observed when the tractor-wagon track width was adjusted based on the sugarcane spacing using either precision auto steering or manual operation of the machinery.

Seedbed

Oxisol

Tractor

10.1590/0103-9016-2014-0078

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Citations (74)