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| Registros recuperados: 30 | |
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| 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 |
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| 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 |
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| 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 < C rich soil < 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 |
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| 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 |
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| 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 |
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| 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<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... |
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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 |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| 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 (< 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 |
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| Registros recuperados: 30 | |
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