Consulta: subjectFacets:"Soil cover"
Registros recuperados: 17
Data/hora: 11/06/2024 02:32:48

USE OF USLE/ GIS TECHNOLOGY FOR IDENTIFYING CRITERIA FOR MONITORING SOIL EROSION LOSSES IN AGRICULTURAL AREAS
Provedor de dados: 70
Autores: Botelho,Thiago H. A.; Jácomo,Simone de A.; Almeida,Rherison T. S.; Griebeler,Nori P.
ABSTRACT The assessment of land use and occupation is essential for predicting soil loss due to water erosion. The objective of this study was to determine criteria for monitoring soil loss in agricultural areas using the Universal Soil Loss Equation (USLE). Soil loss data were intersected with USLE factors and slope using geoprocessing techniques for the Samambaia River watershed, located in Cristalina, Goiás state, Brazil. A slope of 3% to 8% was found in approximately 50% of the study area. However, mean soil losses &lt;10 t ha-1 year-1 were observed in slopes ≤ 3%, where the mean soil length (L) and slope steepness (S) were ≤2 and 0.2, respectively. The intersection of soil loss data with USLE factors was useful for identifying criteria for monitoring...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Soil cover; Water erosion; Topographic factor; Conservation management.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162018000100013

Desiccation time of the spring sorghum as a predecessor crop for summer soybean and autumn bean in a no-tillage system
Provedor de dados: 70
Autores: Denadai,Marcelo S.; Mello,Luiz M. M. de; Chioderoli,Carlos A.; Gazola,Rodolfo de Niro.
ABSTRACT Several authors have been questioned the desiccation interval between the coverage plants and sowing plants for the soybean crop. Therefore, this study aimed to evaluate the desiccation time of the spring sorghum as a predecessor crop for summer soybean and then for autumn bean, focusing on the straw formation for maintenance of the no-tillage system and to evaluate the yield of soybeans and beans grain, as well as analyzing the interference of sorghum straw in these cultures. The experiment was developed in the Teaching and Research Farm of FE/UNESP located in Ilha Solteira/SP where it was used an experimental design of randomized blocks with five treatments and six repetitions. The treatments consisted of five different intervals between sorghum...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Exudates allelochemicals; Soil cover; Desiccation interval for sowing; Crop rotation; Straw production.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162016000100094

Agronomic performance of soybean grown in succession to winter cover crops
Provedor de dados: 86
Autores: Krenchinski,Fábio Henrique; Cesco,Victor José Salomão; Rodrigues,Danilo Morilha; Albrecht,Leandro Paiola; Wobeto,Katle Samaya; Albrecht,Alfredo Júnior Paiola.
Abstract: The objective of this work was to evaluate the effect of winter cover crop species on the agronomic performance of soybean (Glycine max) cropped in succession, under a no-tillage system. The study was conducted during three crop seasons (2011/2012, 2012/2013, and 2013/2014), with the following cover crops: white oat (Avena sativa), black oat (Avena strigosa), ryegrass (Lolium multiflorum), vetch (Vicia sativa), forage radish (Raphanus sativus), the intercrop black oat + forage radish, and wheat (Triticum aestivum) as the standard management. Forage radish and the intercrop black oat + forage radish provided greater soil cover rates after 30 days of planting, as well as dry matter production in the three crop seasons. After 45 and 90 days from...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Glycine max; Crop rotation; Mulching; No-tillage; Soil cover.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2018000800909

Multivariate analysis using a discriminant method for evaluating the techniques of weed management in soybean crop
Provedor de dados: 87
Autores: Bianchini,Alexandre; V.D. Moraes,Pedro; J. Longhi,Solon; F. Adami,Paulo; Rossi,Patricia; V. Batista,Vanderson.
Abstract  Background: The analysis of information generated from experiments involving different treatments, can be done by multivariate statistical analysis techniques, such as discriminant analysis, to analyze data obtained from predefined groups.  Objective: Verify, through discriminant analysis, the differences among cover crop (Avena strigosa, Chenopodium quinoa, Cichorium intybus, and fallow land) treatments with respect to main crop soybean yield.  Methods: For weed control, these cover crops were subjected to different management techniques, namely mowing, the application of glyphosate or the application of paraquat. The experimental design consisted of completely randomized blocks in a 4 × 3 × 2 factorial scheme, with four replications, consisting...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Soil cover; Avena strigose; Chenopodium quinoa; Cichorium intybus; Allelopathy; Analysis discriminating.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582020000100326

Effect of Different Herbicides, Plant Extracts and Mulches on Yield and Yield Components of Maize
Provedor de dados: 87
Autores: KHAN,I.A.; REHMAN,O.U.; KHAN,S.A.; HAMEED ALSAMADANY,; YAHYA ALZAHRANI,.
ABSTRACT: To examine the effect of pre emergence herbicides, plant extracts and mulches on yield and yield components of maize, a field experiment was carried out at New Developmental Farm, The University of Agriculture Peshawar-Pakistan during summer crop season 2016. Maize variety “Azam” was sown in Randomized Complete Block (RCB) design having four replications and ten treatments i.e. hand weeding, Dual Gold 960 EC (S-metolachlor 1 L ha-1), Stomp 330 EC (pendimethaline 2.5 L ha-1), atrazine 1.25 L ha-1, Eucalyptus camaldulensis L. extract (125 g L-1), Ammi visnaga L. extract (125 g L-1), black plastic mulch, wheat straw mulch, saw dust mulch and weedy check. The data revealed that hand weeding and herbicides significantly affected the weed density...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Allelopthy; Zea mays L.; Chemical control; Soil cover; Weeds; Crop production.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582020000100228

Bermuda grass sod production as related to nitrogen rates
Provedor de dados: 90
Autores: Lima,Claudinei Paulo de; Backes,Clarice; Villas Bôas,Roberto Lyra; Oliveira,Mauricio Roberto de; Kiihl,Tammy Aparecida Manabe; Freitag,Elisa Eni.
Of all nutrients, N has the strongest effect on grass growth and an adequate N fertilization can reduce the time required for the formation of high-quality mats. This study aimed to evaluate the influence of N fertilization on Bermuda grass sod production and quality. The experiment was conducted in an area of commercial sod production, in Capela do Alto, state of São Paulo. Cynodon dactylon (Pers) L., known as Bermuda grass, was evaluated in a randomized complete block design with five treatments and four replications. Treatments consisted of five N rates: 0, 150, 300, 450 and 600 kg ha-1. Increasing N applications to Bermuda grass increased the soil cover rate, reducing the time required for mat formation. The accumulation of rhizome + root + stolon dry...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cynodon dactylon (Pers) L; Fertilization rate; Soil cover.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832010000200010

EFFECT OF SOIL TILLAGE AND PLANT RESIDUE ON SURFACE ROUGHNESS OF AN OXISOL UNDER SIMULATED RAIN
Provedor de dados: 90
Autores: Panachuki,Elói; Bertol,Ildegardis; Alves Sobrinho,Teodorico; Oliveira,Paulo Tarso Sanches de; Rodrigues,Dulce Buchala Bicca.
Surface roughness of the soil is formed by mechanical tillage and is also influenced by the kind and amount of plant residue, among other factors. Its persistence over time mainly depends on the fundamental characteristics of rain and soil type. However, few studies have been developed to evaluate these factors in Latossolos (Oxisols). In this study, we evaluated the effect of soil tillage and of amounts of plant residue on surface roughness of an Oxisol under simulated rain. Treatments consisted of the combination of the tillage systems of no-tillage (NT), conventional tillage (CT), and minimum tillage (MT) with rates of plant residue of 0, 1, and 2 Mg ha-1 of oats (Avena strigosa Schreb) and 0, 3, and 6 Mg ha-1 of maize (Zea mays L.). Seven simulated...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Soil cover; Soil surface microrelief; Soil conservation systems.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832015000100268

Temporal variability of soil water content under different surface conditions in the semiarid region of the Pernambuco state
Provedor de dados: 90
Autores: Santos,Thais Emanuelle Monteiro dos; Silva,Demetrius David da; Montenegro,Abelardo Antônio de Assunção.
Rainfall in the semiarid region of Pernambuco is characterized by irregular distribution in time and space, which significantly hinders the rainfed agriculture in the region. This work aims to evaluate the temporal profile of soil moisture in the semiarid region of the Pernambuco State (Brazil) and the effect of different soil surface conditions on soil water content variation and the yield of rainfed beans. To monitor soil water content, five plots 4.5 m wide by 11 m long were installed in a Yellow Argisol (Ultisol). The following treatments were adopted in the experimental plots: natural vegetation, bean intercropped with cactus, beans planted down the slope, beans planted along contour lines with mulch and rock barriers, and bare soil. In each plot,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Moisture profile; Soil cover; Antecedent rainfall.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832010000500025

Copper translocation and tolerance in seedlings of tree species grown in contaminated soil
Provedor de dados: 91
Autores: Silva,Rodrigo F. da; Ros,Clovis O. Da; Scheid,Douglas L.; Grolli,André L.; Marco,Rudinei De; Missio,Evandro L.
ABSTRACTHigh concentrations of copper (Cu) may be toxic to plants, yet some species can be tolerant to soils contaminated by this metal. The study aimed to evaluate Cu translocation and tolerance in seedlings of ‘timbaúva’ (Enterolobium contortisiliquum (Vell.) Morong), ‘pata-de-vaca’ (Bauhinia forficata Link) and ‘amendoim-bravo’ (Pterogyne nitensTul) subjected to Cu-contaminated soil. The study was conducted in a greenhouse for 120 days, using as substrate a clayey Oxisol. The experiment was set in a completely randomized design, using a 3 x 6 factorial scheme, corresponding to three forest species (‘timbaúva’, ‘pata-de-vaca’ and ‘amendoim-bravo’) and six Cu doses in the soil (0, 60, 120, 180, 240 and 300 mg kg-1), with six replicates. The following...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Heavy metal; Phytoremediation; Reforestation; Soil cover.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662015001101093

Path coefficient analysis, a different approach to identify soil quality indicators
Provedor de dados: 91
Autores: Ramos,Júlio C.; Bertol,Ildegardis; Bandeira,Douglas H.; Barbosa,Fabrício T.; Zangiski,Fernanda.
ABSTRACT Soil quality indicators related to water erosion reduction can assist with correct soil management. The objective of this research was to identify some variables that could be used as soil quality indicators with the aid of path coefficient analysis in order to reduce water erosion. The research was carried out in the field between May 2011 and April 2013 in southern Brazil on an Inceptisol. The following treatments were studied under simulated rainfall conditions: 1) no-tilled, cultivated and covered by cultural residue of ryegrass (Lolium multiflorum) (HCR); 2) no-tilled, cultivated and covered by crop residue of vetch (Vicia sativa) (HCV); 3) cultivated and scarified soil containing ryegrass roots (HRR); 4) cultivated and scarified soil...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Soil cover; Surface roughness; Soil losses.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662019000700545

Surface sealing and water erosion of soils with mulching in the semi-arid region of Brazil
Provedor de dados: 91
Autores: Silva,Fábio F. da; Souza,Thais E. M. dos S.; Souza,Edivan R. de; Correa,Marcelo M.; Rolim,Mário M.
ABSTRACT Evaluating soil sealing process of the semi-arid region of Brazil is important to describe this process and mitigate its effects. The objective of this work was to evaluate surface sealing and physical properties of the main soils of the Upper Ipanema watershed, in Pesqueira, Pernambuco state, Brazil, with the use of mulch. The experiment was conducted in a completely randomized design with three replications, using a 3 × 3 × 2 factorial arrangement consisted of three soil classes (abruptic Eutrophic Yellow Argissolo - AEYA, typical Eutrophic Fluvic Neossolo - TEFN, and typical Eutrophic Yellow Argissolo - TEYA), three application times of simulated rainfalls (at 0, 24, and 48 h), and two mulching conditions (with and without mulch), totaling 54...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Soil micromorphology; Simulated rainfall; Soil cover.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662019000400277

Energy conversion efficiency in sugarcane under two row spacings in northeast of Brazil
Provedor de dados: 91
Autores: Ferreira,Ricardo A.; Souza,José L. de; Lyra,Gustavo B.; Escobedo,João F.; Santos,Marshall V. C.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Soil cover; Specific heat of combustion; Radiation use efficiency.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662015000800741

Temporal stability of soil moisture in an experimental watershed in the Pernambuco semi-arid region
Provedor de dados: 91
Autores: Silva Junior,Valdemir P.; Montenegro,Abelardo A. A.; Melo,Rogério O. de.
ABSTRACT Soil moisture estimation is very important in decision making regarding agricultural practices and investigations in hydrology. The aim of the study was to evaluate surface soil moisture temporal stability under two cover crop conditions in an experimental watershed in the Brazilian semi-arid region, aiming to identify stable points, thus reducing monitoring costs and highlighting the importance of temporal stability in a watershed. Fourty five soil moisture monitoring campaigns in the layers of 0-0.10 and 0.10-0.20 m were conducted using a capacitance probe (Diviner – 2000®) during the period from 10/07/2010 to 03/25/2014, with soil cover under native bushy vegetation and degraded pasture, predominantly Brachiaria decumbens. Temporal stability...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Soil types; Soil cover; Caatinga.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662016001000880

Visual assessment of pasture degradation: validation by ground cover and seasonal variation
Provedor de dados: 124
Autores: Monteiro,Edevaldo de Castro; Burak,Diego Lang; Cunha,Alexson de Mello; Passos,Renato Ribeiro; Mendonça,Eduardo de Sá.
ABSTRACT Visual assessments of pasture degradation levels are widespread because they are rapid, practical and inexpensive. However, they can be subjective, making it difficult to distinguish between degradation levels to establish management practices. This fact, in association with the lack of standardization of the number of levels and the assessment periods, suggests a need for further studies. The objective of this study was to evaluate the relation between the degradation levels of visually evaluated pastures and the soil cover measured in fields in summer and winter. Percentages of Brachiaria grass, bare soil, spontaneous vegetation (broad and narrow leaf) and mulch were evaluated in 35 areas with different levels of visual degradation. Canonical...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Brachiaria spp; Soil cover; Multivariate analysis; Quality assessment.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902018000100174

Soil microbial biomass under mulch types in an integrated apple orchard from Southern Brazil
Provedor de dados: 63
Autores: Almeida,Denice de Oliveira; Klauberg Filho,Osmar; Almeida,Henrique Cesar; Gebler,Luciano; Felipe,Aline Franciane.
The use of mulching is an alternative to control weeds but there are few studies on its effect on soil quality. In this sense, this study aimed to evaluate the effect of types of mulching on the attributes of microbial carbon, nitrogen and phosphorus in a Typic Hapludox with production of integrated apples in southern Brazil. The experiment was conducted in randomized blocks in the Vacaria, state of Rio Grande do Sul, southern Brazil. The soil mulch types studied were: pine needle, sawdust, black plastic and a control. The soil samples were collected in February (summer) and August (winter) of 2006, and the attributes related to total organic and microbial carbon, nitrogen and phosphorus were determined. Organic mulchings (pine needle and sawdust) promoted...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Microbial carbon; Soil cover; Microbial compartments; Microorganisms; Organic mulch.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162011000200012

Water erosion under simulated rainfall in different soil management systems during soybean growth
Provedor de dados: 63
Autores: Engel,Fernando Luis; Bertol,Ildegardis; Mafra,Álvaro Luiz; Cogo,Neroli Pedro.
Soil management influences soil cover by crop residues and plant canopy, affecting water erosion. The objective of this research was to quantify water and soil losses by water erosion under different soil tillage systems applied on a typical aluminic Hapludox soil, in an experiment carried out from April 2003 to May 2004, in the Santa Catarina highland region, Lages, southern Brazil. Simulated rainfall was applied during five soybean cropstages, at the constant intensity of 64.0 mm h-1. Treatments were replicated twice and consisted of: i) conventional tillage on bare soil - control treatment (CTBS), ii) conventional tillage on cultivated soil (CTCS), iii) no-tillage on non tilled soil with burned crop residue (NTRB), iv) no-tillage in non tilled soil with...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Soil cover; Soil loss; Water loss; Soybean crop.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162007000200013

Growth and yield of anthurium in response to sawdust mulching
Provedor de dados: 65
Autores: Lima,Juliana Domingues; Zanetti,Samara; Nomura,Edson Shigueaki; Fuzitani,Eduardo Jun; Rozane,Danilo Eduardo; Iori,Piero.
ABSTRACT: The objectives of the study were to analyze the effect of sawdust mulch on the: (1) soil characteristics; (2) growth and flower yield of the anthurium cv. 'Apalai'. Assay was conducted in a totally randomized design in subdivided plots, with five treatments and eight replications. The treatment consisted of five volumes of sawdust 0, 20, 40, 60 and 80L m-2, distributed over the bed, every three months. Soil, plants and flower stalks were evaluated during two years. Soil temperature, moisture, organic matter, bulk density and water retention conditions were improved, while the leaf area of plants and the yield of flower stalks were increased when the soil were mulched with sawdust. In addition to increasing soil organic matter, however, no change...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Floriculture; Anthurium andraeanum; Soil cover; Wood residue; Flowering interval.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782016000300440