Consulta: subjectFacets:"Soil physical properties"
Registros recuperados: 22
Data/hora: 13/06/2024 04:35:01

SIMULATION OF SODIUM AND POTASSIUM DYNAMICS BY THE HYDRUS 2D MODEL IN A HAPLIC PLANOSOL VIA RESIDUE WATER
Provedor de dados: 70
Autores: Andrade,Carolyne W. L. de; Montenegro,Suzana M. G. L.; Miranda,Jarbas H. de; Montenegro,Abelardo A. de A.; Assis,Fred M. C. V. de.
ABSTRACT The application of chemical substances to the soil together with little attention given to the possible environmental impacts, transformed the environment into a recipient of waste. The aim of this study was to simulate the movement of water and solutes (sodium and potassium together) using the STANMOD and HYDRUS-2D models in a typical Haplic Planosol under the application of wastewater via surface irrigation under different flow rates. The experiment was conducted in the laboratory by miscible displacement tests, first using columns with deformed soil under saturation and steady water flow conditions, at a rate of 11.7 cm3 min-1, to obtain transport parameters of sodium and potassium ions, and in the applied residual water, the values of 475 and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Modeling; Nutrients; Soil physical properties; Water reuse.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162018000600874

Qualidade física de solos influenciada pelo uso e manejo na região de Guaraí-TO.
Provedor de dados: 14
Autores: FILIZOLA, H. F.; FONTANA, A.; DONAGEMMA, G. K.; SOUZA, M. D. de; BORTOLON, E. S. O.; BORTOLON, L.
Resumo: As terras onde predominam solos arenosos distribuem-se em extensas áreas em todas as regiões do Brasil, sendo muito utilizadas em áreas de intensificação da agricultura. O uso desses solos nos sistemas agrícolas tem efeito sobre suas características e atributos. Com o objetivo de avaliar as consequências desse uso sobre algumas das suas propriedades físicas foi selecionada uma área localizada em uma propriedade agrícola no município de Guaraí (TO). Em amostras de solos coletadas em 18 trincheiras foram avaliadas a textura, a estabilidade dos agregados, o grau de floculação das argilas, a porosidade, a densidade, a condutividade hidráulica saturada (K s ), a infiltração e a retenção da água no solo. Os solos avaliados não apresentam nenhum dos...
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Solo arenoso; Física do solo; Uso da terra; Textura do solo; Condutividade hidráulica; Porosidade; Retenção de água no solo; Sandy soils; Soil physical properties; Aggregate stability; Soil texture; Soil density; Hydraulic conductivity; Soil water retention; Soil permeability.
Ano: 2017
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1081400

Qualidade física de solos influenciada pelo uso e manejo na região de Guaraí-TO.
Provedor de dados: 14
Autores: FILIZOLA, H. F.; FONTANA, A.; DONAGEMMA, G. K.; SOUZA, M. D. de; BORTOLON, E. S. O.; BORTOLON, L.
Resumo: As terras onde predominam solos arenosos distribuem-se em extensas áreas em todas as regiões do Brasil, sendo muito utilizadas em áreas de intensificação da agricultura. O uso desses solos nos sistemas agrícolas tem efeito sobre suas características e atributos. Com o objetivo de avaliar as consequências desse uso sobre algumas das suas propriedades físicas foi selecionada uma área localizada em uma propriedade agrícola no município de Guaraí (TO). Em amostras de solos coletadas em 18 trincheiras foram avaliadas a textura, a estabilidade dos agregados, o grau de floculação das argilas, a porosidade, a densidade, a condutividade hidráulica saturada (K s ), a infiltração e a retenção da água no solo. Os solos avaliados não apresentam nenhum dos...
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Solo arenoso; Física do solo; Uso da terra; Textura do solo; Condutividade hidráulica; Porosidade; Retenção de água no solo; Sandy soils; Soil physical properties; Aggregate stability; Soil texture; Soil density; Hydraulic conductivity; Soil water retention; Soil permeability.
Ano: 2017
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1075224

Efeito da intensidade de movimentação do solo na produção de soja nas entrelinhas da erva-mate
Provedor de dados: 190
Autores: Dedecek, Renato Antonio; Philipowski, João Filipe; Medrado, Moacir José Sales.
O cultivo de cultura anual nas entrelinhas de plantios de erva-mate é um dos sistemas agroflorestais mais característicos do Sul do Brasil, constituindo-se numa das principais fontes de emprego e renda para os agricultores. A maior ou menor movimentação do solo, no preparo para plantio dos cultivos anuais intercalares à erva-mate, tem gerado dúvidas sobre possíveis prejuízos ao sistema radicular desta. Também não são muito claros os efeitos do uso de gramíneas e/ou leguminosas de inverno como coberturas verdes. Foram objetivos deste trabalho: verificar a influência da movimentação do solo em diferentes sistemas de preparo na implantação de uma cultura de verão nas entrelinhas da erva-mate, em sucessão a coberturas verdes de inverno, e avaliar as...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Coberturas verdes de inverno; Atributos físicos do solo; Sistema agroflorestal; Sistemas de preparo do solo Soil cover crop; Soil physical properties; Agroforestry systems; Soil tillage systems.
Ano: 2003
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/1604

Temporal changes of an alfalfa succession and related soil physical properties on the Loess Plateau, China
Provedor de dados: 86
Autores: She,Dong Li; Shao,Ming An; Timm,Luis Carlos; Reichardt,Klaus.
The objective of this work was to investigate the relationship between changes in the plant community and changes in soil physical properties and water availability, during a succession from alfalfa (Medicago sativa L.) to natural vegetation on the Loess Plateau, China. Data from a succession sere spanning 32 years were collated, and vegetative indexes were compared to changes related to soil bulk density and soil water storage. The alfalfa yield increased for approximately 7 years, then it declined and the alfalfa was replaced by a natural community dominated by Stipa bungeana that began to thrive about 10 years after alfalfa seeding. Soil bulk density increased over time, but the deterioration of the alfalfa was mainly ascribed to a severe reduction in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Medicago sativa; Agropastoral transition zone; Community characteristics; Soil physical properties; Soil water restoration.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2009000200011

Optimum Weed Control Method Increases the Yield of Kinnow by Improving the Physical Properties of Soil
Provedor de dados: 87
Autores: SAJID,M.; AHMAD,S.; JASKANI,M.J.; YASIN,M.
ABSTRACT: Going towards sustainable fruit culture, it is very important that soil fertility should maintain by adopting the proper weeds control and adding the organic matter. This research was carried out to identify the most suitable weed control method for Kinnow orchard. The plants of Kinnow at the age of 6 years grown under drip irrigation were selected. Weeds of orchard were managed by mulching (wood chip and black polyethylene), mechanical (cultivator and rotavator) and chemical (glyphosate) methods. Mechanical weed control was taken as control treatment. The plants where wood chip mulching was used for weed control showed maximum increase in shoot length (24.00 cm), chlorophyll contents (84.00 SPAD value) and yield (11.88 ton ha-1) followed by the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Citrus; Mulches; Glyphosate; Mechanical control; Soil physical properties; Yield.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582018000100284

Physical properties of an Alfisol and no-till soybean yield
Provedor de dados: 90
Autores: Tavares Filho,João; Guimarães,Maria de Fátima; Curmi,Pierre; Tessier,Daniel.
It is known that any kind of soil management causes changes in the soil physical characteristics and can affect agricultural yield. The purpose of this study was to evaluate soil properties of an Alfisol and soybean yield under different management systems for no-tillage annual crops, no-tillage with chiseling and no-tillage crop rotation. The 11-year experiment was initiated in the 1998/99 growing season, on 100 x 30 m plots (11 % slope). Soil samples (5 per management system) were systematically collected (0-25 cm layer) in the summer growing season, to quantify soil organic matter, bulk density, macroporosity and flocculation, as well as soybean yield. The highest values for soil bulk density and organic matter content and the lowest for macroporosity...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: No tillage; Soil physical properties; Organic matter; Crop rotation.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832012000100026

Spatial and linear correlations between soil and corn
Provedor de dados: 90
Autores: Chioderoli,Carlos Alessandro; Mello,Luiz Malcom Mano de; Noronha,Rafael Henrique de Freitas; Pariz,Cristiano Magalhães; Lima,Ronaldo Cintra.
The Technologies setting at Agricultural production system have the main characteristics the vertical productivity, reduced costs, soil physical, chemical and biological improvement to promote production sustainable growth. Thus, the study aimed to determine the variability and the linear and special correlations between the plant and soil attributes in order to select and indicate good representation of soil physical quality for forage productivity. In the growing season of 2006, on the Fazenda Bonança in Pereira Barreto (SP), the productivity of autumn corn forage (FDM) in an irrigated no-tillage system and the soil physical properties were analyzed. The purpose was to study the variability and the linear and spatial correlations between the plant and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Soil physical properties; Soil management; Geostatistics; No-tillage; Forage crops.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832012000300008

Structural changes and degradation of Red Latosols under different management systems for 20 years
Provedor de dados: 90
Autores: Tavares Filho,João; Melo,Thadeu Rodrigues de; Machado,Wesley; Maciel,Bruno Vieira.
Soils are the foundation of terrestrial ecosystems and their role in food production is fundamental, although physical degradation has been observed in recent years, caused by different cultural practices that modify structures and consequently the functioning of soils. The objective of this study was to evaluate possible structural changes and degradation in an Oxisol under different managements for 20 years: no-tillage cultivation with and without crop rotation, perennial crop and conventional tillage, plus a forested area (reference). Initially, the crop profile was described and subsequently, 10 samples per management system and forest soil were collected to quantify soil organic matter, flocculation degree, bulk density, and macroporosity. The results...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Profile; Soil physical properties; Organic matter; Soil quality.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832014000400025

Physical quality of an oxisol under different uses
Provedor de dados: 90
Autores: Mota,Francisco Ocian Bastos; Ness,Ricardo Luiz Lange; Mota,Jaedson Cláudio Anunciato; Clemente,Celso Augusto; Sousa,Sebastião Cavalcante.
The use of a soil induces changes in the physical properties according to the management, tillage intensity and type of crop. The objective of this work was to measure the alterations of some of the soil physical properties and evaluate the physical quality by the S index, an indicator proposed by Dexter (2004), comparing the land uses: eucalyptus plantations at different ages, grazing pasture, annual crops, and an area of preserved secondary vegetation with an area of preserved native forest (National Forest Araripe - NFA) as control. The study was carried out on an Oxisol on the Fazenda Redenção, in Jardim, State of Ceará, Brazil. The experiment was arranged in a completely randomized design with seven treatments and three replications in the layers...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Land use; Soil physical properties; S index; Soil degradation; Araripe Plateau - Brazil.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832012000600017

Multivariate analysis applied to the study of the relationship between soil and plant properties in a peach orchard
Provedor de dados: 90
Autores: Terra,Viviane Santos Silva; Valgas,Ricardo Alexandre; Reisser Júnior,Carlos; Timm,Luis Carlos; Pereira,José Francisco Martins; Carvalho,Flávio Luiz Carpena; Oldoni,Henrique.
In the State of Rio Grande do Sul, the municipality of Pelotas is responsible for 90 % of peach production due to its suitable climate and soil conditions. However, there is the need for new studies that aim at improved fruit quality and increased yield. The aim of this study was to evaluate the relationship that exists between soil physical properties and properties in the peach plant in the years 2010 and 2011 by the technique of multivariate canonical correlation. The experiment was conducted in a peach orchard located in the municipality of Morro Redondo, RS, Brazil, where an experimental grid of 101 plants was established. In a trench dug beside each one of the 101 plants, soil samples were collected to determine silt, clay, and sand contents, soil...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Prunus persica; Canonical correlation; Soil physical properties.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832014000300007

Pine Harvest Impact on Soil Structure of a Dystric Cambisol (Humic)
Provedor de dados: 90
Autores: Costa,Adriano da; Albuquerque,Jackson Adriano; Costa,André da; Warmling,Maria Tereza; Magro,Bruno Afonso.
ABSTRACT Traffic of heavy machinery at harvest and log extraction causes structural degradation of the soil, but studies on the effects of forest harvesting on soils with high organic matter content and exchangeable Al are scarce. The objective of this study was to evaluate the effect of mechanized forest harvesting operations on a Dystric Cambisol (Humic) with high organic matter (more 50 g kg1) content and exchangeable Al (more 6,0 cmolc kg-1), reforested with Pinus taeda L. The evaluated harvesting system were the whole-tree, in which the feller-buncher cuts and lays the trees down in bundles; the skidder drags the tree bundles up near a road; and the harvester delimbs and cuts the trees into short logs, stacking them on the roadside to be loaded onto...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Soil compaction; Mechanized harvesting; Traffic; Soil physical properties.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832016000100410

Water balance of a sugarcane crop: quantitative and qualitative aspects of its measurement
Provedor de dados: 91
Autores: Timm,Luis C.; Oliveira,Julio C. M. de; Tominaga,Tania T.; Cássaro,Fabio A. M.; Reichardt,Klaus; Bacchi,Osny O. S.
The quantification of soil water balance components was conducted in a sugarcane (Saccharum officinarum L.) field differently managed, as well as a qualitative analysis of the methodologies used for their estimation. The study was conducted in randomized block experiment with four replicates and three treatments: bare soil, mulched soil using trash left on the soil surface after harvest, and soil with burnt trash. The soil was classified as a Rhodic Kandiudalf, locally called 'Terra Roxa Estruturada', the experimental area having a slope of 7.4%. Run-off, soil water fluxes at the lower soil volume limit, and soil water storage changes were not affected by the different soil management practices. Furthermore, it was found that the evaluation of run-off and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Water balance; Soil physical properties; Soil management.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662002000100011

Effect of wildfire on soil physical and chemical properties in a Nothofagus glauca forest, Chile
Provedor de dados: 97
Autores: LITTON,CREIGHTON M.; SANTELICES,RÓMULO.
Effects of a wildfire on soil chemical and physical properties in a Nothofagus glauca (Phil.) Krasser forest in the Coastal Mountain Range of south-central Chile were investigated. Response of the soil during the first two years following a wildfire was examined, where data from soil in a burned forest were compared to that in an adjacent, unburned stand. The effects that wildfire have on soil properties in this highly fragmented ecosystem are not well understood, but results from this study suggest similar responses to those found in other mediterranean forest systems. Both physical (bulk density, percent soil moisture, and soil organic matter content) and chemical properties (exchangeable inorganic nitrogen, extractable phosphorus, exchangeable...
Tipo: Journal article
Palavras-chave: Nothofagus glauca; Soil chemical properties; Soil physical properties; Wildfire.
Ano: 2003
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2003000400001

Sampling equipament for soil bulk density determination tested in a Kandiudalfic Eutrudox and a Typic Hapludox
Provedor de dados: 63
Autores: Folegatti,Marcos Vinícius; Brasil,René Porfirio Camponez do; Blanco,Flávio Favaro.
In spatial variability studies of soil physical properties the influence of different samplers on the results is seldomly taken into account. The objective of this work was to evaluate the performance of five different types of sampling equipment for soil bulk density determination, in two different soils a Kandiudalfic Eutrudox and a Typic Hapludox, both of Piracicaba, SP, Brazil. Equipment used for soil undisturbed sampling were: (i) Uhland soil sampler; (ii) Kopecky's Ring; (iii) soil core sampler, model "Soil Moisture"; (iv) soil core sampler Bravifer AI-50 and (v) soil core sampler Bravifer AI-100. The sampling was made in 4 grids of 1m², each with 25 sampling points, with five replications, resulting 100 samples for each soil. It was concluded that...
Tipo: Info:eu-repo/semantics/report
Palavras-chave: Soil sampling; Soil pososity; Soil physical properties.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162001000400027

Plant response to mechanical resistance and air-filled porosity of soils under conventional and no-tillage system
Provedor de dados: 63
Autores: Silva,Alvaro Pires da; Imhoff,Silvia; Kay,Beverley.
Roots may respond to restrictive soil physical conditions and send signals to shoots to control plant growth. Soil mechanical resistance and aeration can be managed to improve the soil physical conditions for plant growth by using different tillage systems. The objective of this study was to quantify the influence of no-tillage and conventional-tillage systems on plant response to soil mechanical resistance and aeration. The study was carried out on a farm, cultivated with corn, with a side-by-side comparison of no-tillage and conventional-tillage systems. Thirty-two paired sampling sites were located along two transects, located one in each treatment. Soil water content, bulk density, and plant growth were measured in each treatment. Based on the soil...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Plant growth; Plant height; Soil physical properties; Tillage system.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162004000400016

Soil structure degradation in patches of alfalfa fields
Provedor de dados: 63
Autores: Miretti,María Celeste; Imhoff,Silvia; Silva,Alvaro Pires da; Lavado,Raúl.
Alfalfa (Medicago sativa) is the basic forage resource for milk production in the flat Pampa of the Santa Fe Province of Argentina. However, the presence of microrelief with patches threatens the expansion of the area cultivated with alfalfa. The lower productivity in the patches is attributed to the inferior soil physical quality. The objectives of this study were to quantify indicators of soil physical quality and to establish the soil properties that would affect the alfalfa productivity in patches (PA) and normal areas (NA). Additionally, the macro and micro nutrient contents in both areas were determined. The experiment was carried out on an Aquic Argiudoll. Eighteen sampling sites, nine in NA and nine in PA were established. At each site, undisturbed...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Soil physical properties; Soil nutrient content; Alfalfa growth.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162010000500015

Establishing management zones using soil electrical conductivity and other soil properties by the fuzzy clustering technique
Provedor de dados: 63
Autores: Molin,José Paulo; Castro,Cesar Nunes de.
The design of site-specific management zones that can successfully define uniform regions of soil fertility attributes that are of importance to crop growth is one of the most challenging steps in precision agriculture. One important method of so proceeding is based solely on crop yield stability using information from yield maps; however, it is possible to accomplish this using soil information. In this study the soil was sampled for electrical conductivity and eleven other soil properties, aiming to define uniform site-specific management zones in relation to these variables. Principal component analysis was used to group variables and fuzzy logic classification was used for clustering the transformed variables. The importance of electrical conductivity...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Precision agriculture; Soil physical properties; Fuzziness.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162008000600001

ผลของอัตราปุ๋ยเคมีและน้ำกากส่าต่อผลผลิตอ้อยและความอุดมสมบูรณ์ของดินร่วนทราย ชุดยโสธร
Provedor de dados: 106
Autores: Srisuda Thippayarugs; Kobkiet Paisancharaen; Jeam Jabrakon.
Tipo: PhysicalObject
Palavras-chave: Sugarcane; Loamy sand; Yasothon soil series; Chemical fertilizer; Vinasse; Soil chemical properties; Soil physical properties; Sugarcane yield; อ้อย; การปลูก; ดินร่วนทราย; ชุดดินยโสธร; การบำรุงดิน; การให้ปุ๋ย; อัตราปุ๋ย; ปุ๋ยเคมี; น้ำกากส่า; ปริมาณธาตุอาหารพืช; คุณสมบัติทางเคมีกายภาพของดิน; ผลผลิต; ผลกระทบ.
Ano: 2012
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5826

Modeling of soil penetration resistance using statistical analyses and artificial neural networks - doi:  10.4025/actasciagron.v34i2.11627
Provedor de dados: 1
Autores: Santos, Fábio Lúcio; Universidade Federal de Viçosa; Jesus, Valquíria Aparecida Mendes de; Universidade Federal de Viçosa; Valente, Domingos Sárvio Magalhães; Universidade Federal de Viçosa.
An important factor for the evaluation of an agricultural system’s sustainability is the monitoring of soil quality via its physical attributes. The physical attributes of soil, such as soil penetration resistance, can be used to monitor and evaluate the soil’s quality. Artificial Neural Networks (ANN) have been employed to solve many problems in agriculture, and the use of this technique can be considered an alternative approach for predicting the penetration resistance produced by the soil’s basic properties, such as bulk density and water content. The aim of this work is to perform an analysis of the soil penetration resistance behavior measured from the cone index under different levels of bulk density and water content using statistical analyses,...
Palavras-chave: 5.03.00.00-8 modeling; Soil physical properties; Neural networks.
Ano: 2012
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/11627

Design a Combined Machine for Seedbed Preparation
Provedor de dados: 111
Autores: Salama, dina Saber; Pibars, Sabreen KH; Abdelhay, Yossry B.; Tayel, mohamed Y.; Nasr, Gamal M.
Soil preparation is a very important part of the grain production process as it is necessary to maximize the possible yield. The mechanical soil preparation assists better water and air circulation and fertilizer dissolving in soils, which can increase the grain yield. The aim of this investigation was to design a new combined machine for seedbed preparation in one trip and assesses its effect on some soil physical properties and crop yield. Field experiments were carried out on clay loam, three diverse tillage methods were conducted under the same conditions of soil moisture content, operating speed and plowing depth. The tillage methods were: new combined (NCM), traditional method (TM) and no tillage method (NT). Results Clarified that the new combined...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Seedbed preparation; Combined machine; Soil physical properties; Onion yield; Clay loam soil.
Ano: 2018
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/4591

Site index and soil properties in young plantations of Eucalyptus grandis and E. urophylla in Southeastern Mexico
Provedor de dados: 115
Autores: Delgado-Caballero,Carina E.; Gómez-Guerrero,Armando; Valdez-Lazalde,José R.; De los Santos-Posadas,Hector; Fierros-González,Aurelio M.; Horwath,William R.
Research on the ability of tropical soils to support fast-growing forests species is required to optimize, preserve and select lands for timber production. In this work site index (SI) of Eucalyptus grandis and E. urophylla plantations in Southeastern Mexico, was related to chemical and physical soil properties. Based on a joint model of SI vs. sand content, the fit suggests that SI improves as the sand content increases (p&lt;0.01). Sand content of 28% in the surface soil (0-5 cm) and 24% in the sub-surface soil (5-30 cm) is a desired minimum for establishing highly productive stands. The best SI conditions were found on sandy soils with a sand content of 65 %. Other variables, such as soil bulk density, N mineralization and organic matter were also...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Forest plantations; Forest soils; Site productivity; Soil physical properties.
Ano: 2009
URL: http://www.scielo.org.mx/scielo.php?script=sci_arttext&pid=S1405-31952009000100007