Consulta: subjectFacets:"Soil properties"
Registros recuperados: 30
Data/hora: 09/06/2024 08:30:54

Capacidad productiva de praderas mono-específica, asociada y silvopastoril en un ambiente tropical seco.
Provedor de dados: 32
Autores: Jiménez Guillén, Régulo.
Esta investigación tuvo como objetivo describir las características edáficas, del  forraje y la respuesta productiva de bovinos, en tres tipos de pradera para un ambiente tropical seco. Los tratamientos fueron praderas con: A) Andropogon gayanus; A+C) A. gayanus y Clitoria ternatea y A+C+M) A. gayanus, C. ternatea y Morus alba. En la época de lluvias el forraje ofrecido, residual y desaparecido, fue diferente (P&lt;0.05) entre tratamientos. El forraje total ofrecido fue de 2,007 b, 4,089 a y 4,192 a kg de materia seca (MS) ha-1 para praderas con A, A+C y A+C+M, respectivamente y, en la época seca, la cantidad de forraje ofrecida fue de 1,435 b, 3,471 a y 2,547 ab kg de MS ha-1, para las mismas praderas. Durante la época de lluvia los cambios en forraje...
Palavras-chave: Praderas asociadas; Características del suelo; Cambios en el forraje; Ganancias de peso vivo; Associated prairies; Soil properties; Forage changes; Live weight gains; Ganadería; Doctorado.
Ano: 2012
URL: http://hdl.handle.net/10521/666

Liming acidic soils.
Provedor de dados: 14
Autores: MACHADO, P. L. O. de A.; BENITES, V. de M.; BOLAN, N.
1. Description of the practice. 2. Range of applicability. 3. Impact on soil organic carbon stocks. 4. Other benefits of the practice. 5. Potential drawbacks to the practice. 6. Recommendations before implementing the practice. 7. Potential barriers for adoption.
Tipo: Capítulo em livro técnico (INFOTECA-E)
Palavras-chave: Solo Ácido; Acid soils; Liming; Soil organic carbon; Soil properties; Climate change; Greenhouse gas emissions.
Ano: 2021
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1137163

Cambios en el carbón orgánico del suelo en la cuenca superior del río Heihe, China
Provedor de dados: 85
Autores: Qin,YY; Qi,F; Holden,NM; Cao,JJ.
The Heihe River Basin is a globally significant carbon pool, but its soil organic carbon dynamics is poorly understood. Soil samples taken between 2500 m and 4100 m revealed that the majority (&gt;75%) of soil organic carbon was from 0-40 cm. It showed a negative relationship with pH and soil bulk density, and a positive relationship with altitude and soil water content, respectively. From 2005 to 2011, soil carbon content in the upper catchment decreased from 93 g/kg to 53 g/kg. These results suggest that policies should aim to reduce carbon loss by transferring it from the top- to the sub-soil.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Soil properties; Soil carbon content; Soil carbon storage; Qilian Mountains.
Ano: 2016
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572016000100020

Weed Flora of Citrus Orchards and Factors Affecting its Distribution in Western Mediterranean Region of Turkey
Provedor de dados: 87
Autores: ONEN,H.; AKDENIZ,M.; FAROOQ,S.; HUSSAIN,M.; OZASLAN,C.
ABSTRACT: Citrus is an important export commodity, mostly grown on Mediterranean and Aegean coasts of Turkey. Weeds are hidden foes impairing citrus productivity. Limited knowledge of weed distribution and factors affecting the distribution are among major hurdles in successful weed management. In this study, weed flora of citrus orchards and factors affecting its distributions in Mugla province of Turkey were determined. Sixty orchards were surveyed in spring and autumn seasons of 2010 and 2011. Data relating to frequency, coverage and density of weed species were recorded. Soil samples (0-30 cm depth) were collected and analyzed for physicochemical properties. Climatic variables, altitude and soil properties were correlated with weed flora. Sixty-eight...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Weeds; Multivariate analysis; Soil properties; Weather.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582018000100236

Integration of Allelopathic Crop Residues and NPK Fertilizer to Mitigate Residue-Phytotoxicity, Improve Soil Fertility and Wheat Growth under Different Moisture Conditions
Provedor de dados: 87
Autores: FAROOQ,N.; IQBAL,M.; ZAHIR,Z.A.; FAROOQ,M.
ABSTRACT: Phytotoxic effects of allelopathic crop residues are important to trickle for their use as a source of organic amendments to improve soil fertility. In present study, through pots and two year field studies, we examined the integrated effect of allelopathic residues and NPK fertilizer treatments including T0 (control), T1 (200-150-100 kg NPK ha 1), T2 (100-75-50 kg NPK ha-1 + mung bean straw 4 t ha-1), T3 (100-75-50 kg NPK ha-1 + rice straw 4 t ha-1), T4 (mung bean straw 8 t ha-1) and T5 (rice straw 8 t ha-1) under different water regimes on soil fertility and wheat crop. Solo application of mung bean residue and rice straw caused significant inhibition of various germination and growth traits of wheat while minimal inhibition occurred when...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Integrated nutrient management; Organic amendments; Wet dry cycles; Soil properties.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582018000100319

Developing a hydrological model for the Mekong Basin: impacts of basin development on fisheries productivity.
Provedor de dados: 31
Autores: Kite,   Geoff.
Tipo: Working or Discussion Paper
Palavras-chave: Simulation models; Hydrology; River basins; Water resource management; Productivity; Flow; Fisheries; Mapping; Data collection; Computer techniques; Climate; Soil properties; Stream flow; Dams; Productivity Analysis; Resource /Energy Economics and Policy.
Ano: 2000
URL: http://purl.umn.edu/92781

Urban wastewater:  A valuable resource for agriculture - A case study from Haroonabad, Pakistan
Provedor de dados: 31
Autores: van der Hoek,   Wim; Ul Hassan,   Mehmood; Ensink,   Jeroen H.J.; Feenstra,   Sabiena; Raschid-Sally,   Liqa; Munir,   Sarfraz; Aslam,   Rizwan; Ali,   Nazim; Hussain,   Raheela; Matsuno,   Yutaka.
Farming communities in water-scarce regions increasingly practice the use of urban wastewater in agriculture. Untreated urban wastewater is generally considered unacceptable for direct use because of potential health risks. However, in many parts of the world, poor farmers in peri-urban areas use untreated wastewater. This situation is considered likely to continue even in the foreseeable future due to the high investment cost associated with the installation of treatment facilities.
Tipo: Report
Palavras-chave: Waste waters; Irrigation water; Water reuse; Economic analysis; Soil properties; Households; Water availability; Water use; Water quality; Groundwater; Public health; Risks; Case studies; Agribusiness; Agricultural and Food Policy; Consumer/Household Economics; Crop Production/Industries; Environmental Economics and Policy; Farm Management; Food Consumption/Nutrition/Food Safety; Production Economics; Risk and Uncertainty.
Ano: 2002
URL: http://purl.umn.edu/44566

Productivity and performance of irrigated wheat farms across canal commands in the Lower Indus Basin
Provedor de dados: 31
Autores: Hussain,   Intizar; Marikar,   Fuard; Jehangir,   Waqar Ahmed.
A study of the enormous differences in agricultural productivity that exist across farms and regions in Pakistan, where, for example, recent farm-level data from Sindh, indicates that irrigated wheat output per hectare varies from 0.5 to 5.4 tons across farms. Looks at the central goal of agricultural policy in the country, viz. improving and sustaining productivity, narrowing the existing productivity gaps, and enhancing resource use efficiencies to meet food requirements of a rapidly growing population.
Tipo: Report
Palavras-chave: Irrigated farming; Wheat; Productivity; Performance evaluation; Water management; Cropping systems; Water supply; Soil properties; Models; Pakistan; Lower Indus Basin; Agribusiness; Agricultural Finance; Crop Production/Industries; Environmental Economics and Policy; Farm Management; Production Economics; Productivity Analysis.
Ano: 2000
URL: http://purl.umn.edu/53023

Wastewater use in agriculture: Review of impacts and methodological issues in valuing impacts
Provedor de dados: 31
Autores: Hussain,   Intizar; Raschid,   Liqa; Hanjra,   Munir A.; Marikar,   Fuard; van der Hoek,   Wim.
Tipo: Working or Discussion Paper
Palavras-chave: Waste waters; Water quality; Flow; Water reuse; Recycling; Irrigation water; Public health; Crop production; Salinity; Soil properties; Groundwater; Ecology; Social impact; Economic impact; Cost benefit analysis; Crop Production/Industries; Demand and Price Analysis; Environmental Economics and Policy; Health Economics and Policy; Resource /Energy Economics and Policy.
Ano: 2002
URL: http://purl.umn.edu/92696

Productivity and performance of irrigated wheat farms across canal commands in the Lower Indus Basin
Provedor de dados: 31
Autores: Hussain,   Intizar; Marikar,   Fuard; Jehangir,   Waqar Ahmed.
A study of the enormous differences in agricultural productivity that exist across farms and regions in Pakistan, where, for example, recent farm-level data from Sindh, indicates that irrigated wheat output per hectare varies from 0.5 to 5.4 tons across farms. Looks at the central goal of agricultural policy in the country, viz. improving and sustaining productivity, narrowing the existing productivity gaps, and enhancing resource use efficiencies to meet food requirements of a rapidly growing population.
Tipo: Report
Palavras-chave: Irrigated farming; Wheat; Productivity; Performance evaluation; Water management; Cropping systems; Water supply; Soil properties; Models; Pakistan; Lower Indus Basin; Community/Rural/Urban Development; Crop Production/Industries; Demand and Price Analysis; Environmental Economics and Policy; Farm Management; Production Economics; Productivity Analysis.
Ano: 2000
URL: http://purl.umn.edu/53024

Chronofunctions of Heilu soil developed from Loess in Luochuan, on the chinese Loess plateau
Provedor de dados: 90
Autores: Liu,Gang; Xu,Wennian; Cai,Chongfa.
Soil chronofunctions are an alternative for the quantification of soil-forming processes and underlie the modeling of soil genesis. To establish soil chronofunctions of a Heilu soil profile on Loess in Luochuan, selected soil properties and the 14C ages in the Holocene were studied. Linear, logarithmic, and third-order polynomial functions were selected to fit the relationships between soil properties and ages. The results indicated that third-order polynomial function fit best for the relationships between clay (&lt; 0.002 mm), silt (0.002-0.02 mm), sand (0.02-2 mm) and soil ages, and a trend of an Ah horizon ocurrence in the profile. The logarithmic function indicated mainly variations of soil organic carbon and pH with time (soil age). The variation in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: 14C age; Soil properties; Element migration; Soil development.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832011000400003

Pedological Heterogeneity of Soils Developed from Lithologies of the Pirambóia, Sanga-do-Cabral, and Guará Geological Formations in Southern Brazil
Provedor de dados: 90
Autores: Santos,Pablo Grahl dos; Almeida,Jaime Antonio de; Sequinatto,Letícia; Miquelluti,David José.
ABSTRACT The source material is one of the factors that most influence soil genesis and the mainly responsible for the nature, composition, and behavior of the soil. Given the geological complexity of the Santa Maria River basin, the objective of this study was to investigate whether the new lithologies described recently may be responsible for a greater variation in soil properties, as well as in the soil taxonomy itself. The study area is located in the municipality of Rosário do Sul, RS, Brazil at 30° 15’ 28” S and 54° 54’ 50” W, with average altitude of 132 m and climate type Cfa. This study was supported by a cartographic base composed of topographic charts, geological maps, satellite images, digital elevation models, and maps of geomorphometric...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Lithology; Topolithosequence; Geomorphic surfaces; Soil properties; Multivariate analysis.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832017000100310

Impacts of land leveling on lowland soil physical properties
Provedor de dados: 90
Autores: Parfitt,José Maria Barbat; Timm,Luís Carlos; Reichardt,Klaus; Pauletto,Eloy Antonio.
The practice of land leveling alters the soil surface to create a uniform slope to improve land conditions for the application of all agricultural practices. The aims of this study were to evaluate the impacts of land leveling through the magnitudes, variances and spatial distributions of selected soil physical properties of a lowland area in the State of Rio Grande do Sul, Brazil; the relationships between the magnitude of cuts and/or fills and soil physical properties after the leveling process; and evaluation of the effect of leveling on the spatial distribution of the top of the B horizon in relation to the soil surface. In the 0-0.20 m layer, a 100-point geo-referenced grid covering two taxonomic soil classes was used in assessment of the following...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Soil management practices; Land forming; Irrigated rice crop; Soil movement; Soil properties.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832014000100032

Soil Erodibility under Natural Rainfall Conditions as the K Factor of the Universal Soil Loss Equation and Application of the Nomograph for a Subtropical Ultisol
Provedor de dados: 90
Autores: Cassol,Elemar Antonino; Silva,Tiago Stumpf da; Eltz,Flávio Luiz Foletto; Levien,Renato.
ABSTRACT: Erodibility represents the intrinsic susceptibility of the soil to the erosion process, represented by the K factor in the Universal Soil Loss Equation (USLE). In Brazil, there are few field experiments determined with a series larger than ten years of data, which are the most reliable for quantifying the K factor. The aim of this study was to determine the K factor of the USLE by the direct method, relating soil losses determined in the field under standard conditions to erosivity of rains, and by the analytic method, applying the Wischmeier nomograph. The data on soil loss by water erosion were obtained in a field experiment under natural rainfall conditions from 1976 to 1989 in an Ultisol at the Agronomic Experimental Station in Eldorado do...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Water erosion; Soil loss; Soil properties; Erosion modeling; Surface runoff.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832018000100518

Spatial Variability of Soil Fauna Under Different Land Use and Managements
Provedor de dados: 90
Autores: Silva,Raimunda Alves; Siqueira,Glécio Machado; Costa,Mayanna Karlla Lima; Guedes Filho,Osvaldo; Silva,Ênio Farias de França e.
ABSTRACT Geostatistics allows the evaluation of the distribution pattern of data with high spatial variability in agricultural systems. This study aimed to evaluate the spatial variability of biological diversity indices of soil fauna under different land (agriculture and forest). Samples were collected in seven areas (millet, soybean, corn, eucalyptus, pasture crops, and preserved and disturbed Cerrado), in Maranhão state, Brazil. The soil fauna was caught trapped in pitfall traps, installed 3 m away from each other. In each area, 130 traps were maintained for seven days. After this period, they were removed and their content transferred to bottles and taken to the laboratory, where the insects were screened and identified at the level of orders and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Soil biodiversity; Soil properties; Geostatistics.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832018000100409

State-space analysis of soil data: an approach based on space-varying regression models
Provedor de dados: 63
Autores: Timm,Luís Carlos; Barbosa,Emanuel Pimentel; Souza,Manoel Dornelas de; Dynia,José Flávio; Reichardt,Klaus.
The assessment of the relationship among soil properties (such as total nitrogen and organic carbon) taken along lines called transects is a subject of great interest in agricultural experimentation. This question has been usually approached through standard state-space methods by some authors in the soil science literature. Important limitations of the mentioned procedures used in practice are pointed out and discussed in this paper, specially those related to the model parameters, meaning and practical interpretation. In the standard state-space approach, based on an autoregressive structure, it does not present any parameters that express the variables relationship at the same point in space, but only at lagged points. Also, its model parameters (in the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Dynamic regression; Soil properties; Spatial heterogeneity; Kalman filter.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162003000200023

Soil spiders (Arachnida: Araneae) in native and reforested Araucaria forests
Provedor de dados: 63
Autores: Pereira,Jamil de Morais; Cardoso,Elke Jurandy Bran Nogueira; Brescovit,Antonio Domingos; Oliveira Filho,Luís Carlos Iuñes de; Segat,Julia Corá; Baretta,Carolina Riviera Duarte Maluche; Baretta,Dilmar.
ABSTRACT: Spiders are part of the soil biodiversity, considered fundamental to the food chain hierarchy, directly and indirectly influencing several services in agricultural and forest ecosystems. The present study aimed to evaluate the biodiversity of soil spider families and identify which soil properties influence their presence, as well as proposing families as potential bioindicators. Native forest (NF) and reforested sites (RF) with Araucaria angustifolia (Bertol.) Kuntze were evaluated in three regions of the state São Paulo, both in the winter and summer. Fifteen soil samples were collected from each forest to evaluate the biological (spiders and microbiological), chemical and physical soil properties, in addition to properties of the litter (dry...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Spider fauna; Soil biodiversity; Soil properties; Soil quality.
Ano: 2021
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162021000300701

Sorption and desorption of indaziflam degradates in several agricultural soils
Provedor de dados: 63
Autores: Alonso,Diego Gonçalves; Oliveira Jr,Rubem Silvério de; Koskinen,William Charles; Hall,Kathleen; Constantin,Jamil; Mislankar,Suresh.
ABSTRACT Processes regulating pesticide fate in the environment are influenced by the physicochemical properties of pesticides and soils. Sorption and desorption are important processes as they regulate the movement of pesticides in soil. Although sorption-desorption is widely studied for herbicides, studies involving their metabolites in soil are scarce. Sorption and desorption of indaziflam metabolites (indaziflam-triazinediamine (FDAT), indaziflam-triazine-indanone (ITI) and indaziflam-carboxilic acid (ICA)) were investigated in six Brazilian (BRA) soils and three United States (USA) soils with different physicochemical properties. The Freundlich equation described sorption of the metabolites for all soils (R2 &gt; 0.98; 1/n ~ 1). Sorption order (Kf)...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Adsorption; Hysteresis; Metabolites; Soil properties.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162016000200169

อิทธิพลของการใช้ที่ดินต่อสมบัติของดินในพื้นที่อ่างขาง จังหวัดเชียงใหม่
Provedor de dados: 106
Autores: Naruemol Wasuwan.
Thesis (M.Sc. in Agriculture)
Tipo: PhysicalObject
Palavras-chave: Soil properties; Soil conservation; Soil management; Land use; Ang Khang area; Chiang Mai province; การใช้ที่ดิน; การอนุรักษ์ดิน; การจัดการดิน; คุณสมบัติของดิน; พื้นที่อ่างขาง; จ.เชียงใหม่.
Ano: 2008
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5472

การศึกษาระดับธาตุอาหารพืชและคุณสมบัติของดินที่สำคัญต่อการใช้ที่ดินบนดอยอ่างขาง
Provedor de dados: 106
Autores: Somnuk Manlanont.
Thesis (M.Sc. in Agriculture)
Tipo: PhysicalObject
Palavras-chave: Corn; Soil analysis; Soil properties; Nutrient level; Doi AngKhang; Doi Pui; Pak Chong series; ข้าวโพด; ดินที่สูง; คุณสมบัติทางเคมีและกายภาพของดิน; ระดับธาตุอาหารพืช; การตอบสนองต่อปุ๋ย; ดอยอ่างขาง; ดอยปุย; ดินชุดปากช่อง.
Ano: 1977
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5353

ผลกระทบของการปลูกสวนป่าต่อลักษณะดินในพื้นที่ลาดชัน บริเวณดอยอ่างขาง จังหวัดเชียงใหม่
Provedor de dados: 106
Autores: Tawatchai Jamrassang.
Thesis (M.Sc. in Environmental Science)
Tipo: PhysicalObject
Palavras-chave: Forest plantation; Soil properties; Slope land; Impact; Doi Angkhang; สวนป่า; ลักษณะดิน; พื้นที่ลาดชัน; พื้นที่ป่าเสื่อมโทรม; พื้นที่ทำการเกษตรแบบไร่เลื่อนลอย; คุณสมบัติดิน; การคัดเลือกพันธุ์ไม้; ดอยอ่างขาง.
Ano: 1996
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5473

Studies on the role of green manure legumes for corn and sorghum cropping system
Provedor de dados: 106
Autores: Aschan Sukthumrong; Sukum Chotechuangmanirat; Jongruk Chanchareonsook.
5 tables
Palavras-chave: Corn; Maize; Sorghum; Legumes; Green manures; Fertilizers; Rock phosphate; Cropping systems; Yields; Economic analysis; Soil properties; ข้าวโพด; ข้าวฟ่าง; ระบบการปลูกพืช; พืชตระกูลถั่ว; ปุ๋ยพืชสด.
Ano: 1981
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4070

ผลของการตัดขยายระยะต่อการเติบโต การใช้น้ำ และคุณสมบัติของดินบางประการของสวนป่าไม้ต่างถิ่นในที่สูง
Provedor de dados: 106
Autores: Kritsanakorn Phankham.
Thesis (M.Sc. in Forestry)
Tipo: PhysicalObject
Palavras-chave: Exotic tree plantation; Thinning; Growth; Water use; Soil properties; High land; ไม้กระถินดอย; สวนป่าไม้ต่างถิ่น; การเติบโต; การใช้น้ำ; คุณสมบัติของดิน; การตัดขยายระยะ; ผลผลิต.
Ano: 2004
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5463

Spatial dependency and correlation of properties of soil cultivated with oil palm, Elaeis guineensis, in agroforestry systems in the eastern Brazilian Amazon
Provedor de dados: 36
Autores: SILVA,Camila Santos da; MENDONÇA,Bruno Araujo Furtado de; PEREIRA,Marcos Gervasio; ARAÚJO,Emanuel José Gomes de; CASTELLANI,Débora Christina.
ABSTRACT Geostatistics is a tool that can be used to produce maps with the distribution of nutrients essential for the development of plants. Therefore, the present study aimed to analyze the spatial variation in chemical attributes of soils under oil palm cultivation in agroforestry systems in the eastern Brazilian Amazon, and their spatial dependence pattern. Sixty spatially standardized and georeferenced soil samples were collected at each of three sampling sites (DU1, DU2, and DU3) at 0-20 cm depth. Evaluated soil chemical attributes were pH, Al3+, H+Al, K+, Ca2+, Mg2+, cation exchange capacity (CEC), P, and organic matter (OM). The spatial dependence of these variables was evaluated with a semivariogram analysis, adjusting three theoretical models...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cokriging; Ordinary kriging; Semivariogram; Soil properties.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672018000400280

Effect of fire under the soils on the organization of communities of three remnants of Amazonian savannas
Provedor de dados: 39
Autores: Santos,Ronaldo Oliveira dos; Souza,Alan Pena de; Soares,Rubiene Neto; Rabelo,Fernando Galvão; Silva,Breno Marques da Silva e; Costa Neto,Salustiano Vilar da.
ABSTRACT Areas of cerrado (Brazilian savanna) in the Amazon have been poorly studied from the perspective of fire impacts on environmental sustainability, especially with regard to disturbances to soil and vegetation structure. This study aimed to analyze the influence of edaphic variables and fire together on the composition and structure of tree and shrub vegetation of three cerrado remnants in the Amazon. Eight plots were systematically installed in burned and unburned environments in each remnant. Data were submitted to floristic diversity, similarity, and diametric and altimetric structural assessments. Phytosociological parameters were obtained and submitted to Principal Component Analysis (PCA) and Canonical Correspondence Analysis (CCA). A total of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amazon savannas; PCA; CCA; Soil properties; Phytosociological analysis.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062020000300505

Assessment of Influence and Inter-Relationships of Soil Properties in Tropical Grasslands of Central India
Provedor de dados: 111
Autores: goroshi, sheshakumar k.
The present experiment was carried out to assess influence and inter-relationships of soil properties in grasslands of three wildlife protected national parks in Central India. Aboveground biomass samples of grass and soil samples were collected during different seasons based on specified measurement protocol by the state forest department. Aboveground biomass of grass demonstrated a characteristic growth pattern throughout the year, increased and achieved maximum biomass during at the end of rainy season (September), while started decreasing and attained minimum biomass during pre-summer (March) season. Mean aboveground biomass in the study regions was varied from 2.03 (Bandhavgadh National Park) to 5.44 Mg ha-1 (Kanha  National Park) with an average...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Grassland; Aboveground biomass; Soil moisture; Soil properties; Central India.
Ano: 2015
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/2535

Environmental controls of lucerne (Medicago sativa L.) growth across a climatic and edaphic gradient
Provedor de dados: 114
Autores: Druille,M.; Deregibus,V.; Garbulsky,M. F.
Lucerne is one of the most valuable forage species because of its high productivity and nutritional traits. However, the knowledge of spatio-temporal variability and environmental controls of its growth generated from the simultaneous study of several sites and throughout several years is extremely scarce. Five-year biomass data were analyzed from four rain fed sites located across a climatic and edaphic gradient in Argentina. The aims proposed were to characterize annual and seasonal lucerne growth, to analyze environmental controls of spatial and temporal growth, and to compare water use efficiency (WUE) among sites. Annual growth differed significantly among sites, ranging between 7,514 and 14,262 kg DM/ha. This range at the spatial scale was mainly...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Soil properties; Water use efficiency; Forage production; Climate.
Ano: 2017
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1668-298X2017000200002

Differential response of microbial respiration to supplied nitrogen forms in 3 contrasting alpine meadow soils on the Tibetan Plateau
Provedor de dados: 53
Autores: Zeng,Xiaoyang.
ABSTRACT An incubation experiment was conducted to examine the effects of nitrogen (N) applications in different forms (NH4NO3, NH4Cl, and KNO3) on microbial respiration considering 3 different alpine meadow soils (C poor soil, pH = 8.1, 1.6% C; C moderate soil, pH = 6.0, 5.0% C; C rich soil, pH = 7.1, 7.4% C) in the Tibetan Plateau. The addition of NH4NO3 and NH4Cl increased the microbial respiration in C poor soil, but KNO3 had no effect. The inorganic N forms had no effects on C rich soil, but decreased microbial respiration in C moderate soil. Soil microbial respiration levels across the different types were ordered as follows: C poor soil &lt; C rich soil &lt; C moderate soil, regardless of N addition. These results suggest that the effect of N on...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: C cycling; Microbial activity; N deposition; Soil properties; High-altitude region.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052017000300416

Influence of Municipal Solid Waste Compost on Soil Properties and Plant Reestablishment in Peri-Urban Environments
Provedor de dados: 117
Autores: Civeira,Gabriela.
Soils in urban areas often present characteristics that might submit these environments to erosion processes. Applying municipal solid wastes (MSW) composts to soils have been suggested as a means to improve physical and chemical properties. A field experiment with a completely randomized design was conducted in a Typic Argiudoll from a degraded area in Buenos Aires City. The objective was to evaluate the effect of MSW compost application on soil properties, residue decomposition and Poa (Poa pratensis L.) reestablishment. At the beginning of the trial, compost was prepared and applied in a bare soil on 0.25 m² square plots afterwards litterbags were incorporated and Poa was sown. Compost amounts were: 0 (control); 2 (low); 4 (medium) and 7 kg m-2 (high)...
Tipo: Journal article
Palavras-chave: Soil restoration; Municipal solid waste compost; Soil properties.
Ano: 2010
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392010000300012

Variability of Soil Types in Wetland Meadows in the South of the Chilean Patagonia
Provedor de dados: 117
Autores: Filipová,Ladislava; Hédl,Radim; Covacevich C.,Nilo.
The wetland meadows and pastures (vegas) of the agricultural zone of the Magallanes Region and the Chilean Patagonia are productive and intensively exploited ecosystems. However, there is scarce data about the typology and the physical and chemical properties of the soils that determine the agricultural potential of vegas sites. Sampling of the main horizons of 47 soil profiles was conducted throughout the area. The profiles were described in the field and consequently classified according to the soil typology system of the WRB (IUSS Working Group WRB, 2006). Analyses of bulk and particle densities, capillary water capacity, pH (H2O), pH (CaCl2), texture, organic material, C:N ratio, electrical conductivity, effective cation exchange capacity, N, P,...
Tipo: Journal article
Palavras-chave: Histosols; Fluvisols; Peat; Soil properties; Salinization; Soil degradation.
Ano: 2010
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392010000200010