Nitrate Leaching
Mostrando 1-12 de 25 artigos, teses e dissertações.
-
1. Leaching of Heavy Metals in Soils Conditioned with Biosolids from Sewage Sludge
ABSTRACT A promising use of biosolids is as organic fertilizer in agricultural and forestry activities. However, its composition might contain several pollutants, especially heavy metals, which may result in an increase in the concentrations of these elements in the soil and the risk of groundwater contamination. This study aimed to determine the leaching le
Floresta Ambient.. Publicado em: 03/10/2019
-
2. Vermicompost and biochar substrates can reduce nutrients leachates on containerized ornamental plant production
RESUMO A produção de plantas ornamentais em contêineres está enfrentando vários desafios ambientais. Um deles é substituir os substratos amplamente utilizados, mas com sustentabilidade questionável, baseados em turfa, e outro é evitar a contaminação da água por produtos químicos lixiviados do viveiro. Verificou-se que as plantas de petúnia e ger
Hortic. Bras.. Publicado em: 15/04/2019
-
3. Reducing the leachability of nitrate, phosphorus and heavy metals from soil using waste material
Abstract Contaminants like nitrate (NO3), phosphorus (P) and heavy metals in water are often associated with agricultural activities. Various soil and water remediation techniques have been employed to reduce the risk associated with these contaminants. A study was conducted to examine the extent of leaching of heavy metals (Cd, Ni, Pb and Cr), NO3 and P. Fo
Braz. J. Chem. Eng.. Publicado em: 2017-07
-
4. Association of swine wastewater and mineral fertilization on black oat production
ABSTRACT Swine wastewater (SW) has high organic load, becoming an important source of macro and micronutrients to plants, promoting the improvement of soil quality and development in various cultures. However, when done without agronomic and environmental criteria, it can cause soil problems, nutrient leaching, water resource damage and plant toxicity. The o
Eng. Agríc.. Publicado em: 2016-10
-
5. Organic and Nitrogen Fertilization of Soil under ‘Syrah’ Grapevine: Effects on Soil Chemical Properties and Nitrate Concentration
ABSTRACT Viticulture is an activity of great social and economic importance in the lower-middle region of the São Francisco River valley in northeastern Brazil. In this region, the fertility of soils under vineyards is generally poor. To assess the effects of organic and nitrogen fertilization on chemical properties and nitrate concentrations in an Argissol
Rev. Bras. Ciênc. Solo. Publicado em: 26/04/2016
-
6. LEACHING OF COARSE CALICHE ORE. EXPERIMENT AND MODELLING
Abstract Heap leaching of caliche ores is frequently performed with run-of-mine (ROM) material, which includes rocks of very different sizes; however, most of the experimental data are obtained using small particles. To contribute to the understanding of caliche leaching, an experiment using coarse particles was carried out. The recoveries obtained from this
Braz. J. Chem. Eng.. Publicado em: 2016-03
-
7. GESSO AGRÍCOLA E ADUBAÇÃO NITROGENADA NA CULTURA DO MILHO EM SISTEMA PLANTIO DIRETO
A considerably part of the high nitrogen (N) rates applied in corn is not absorbed due root growth restriction by subsoil acidity. Gypsum is able to improve conditions for root growth and lead to greater N uptake efficiency, increasing corn yield. Thus to evaluate the effect of gypsum and N on top dressing on soil chemical attributes, root growth , mineral n
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 10/11/2012
-
8. Teores de água e solutos no solo: desempenho e sensibilidade do modelo Hydrus-1D / Water and solutes contents in soil: performance and sensitivity of Hydrus-1D model
A preocupação com o destino de produtos químicos e água, aplicados ao solo, tem motivado vários pesquisadores a desenvolverem e aplicarem modelos teóricos, objetivando descrever os processos físicos envolvidos no transporte desses produtos no perfil do solo. Nesse sentido, a presente pesquisa teve como objetivo a aplicação do modelo Hydrus-1D para s
Publicado em: 2010
-
9. Perdas de nitrogênio por volatilização e lixiviação provenientes de fertilizantes granulados NK e NS / Nitrogen losses by volatilization and leaching from a granulated fertilizer NK and NS
In order to evaluate the volatilization of N-NH3 and leaching of N from granulated mixtures NK (urea and potassium chloride) and NS (urea and ammonium sulfate) in two soils, two experiments were conducted in a greenhouse with controlled temperature and humidity. The experiment followed a completely randomized design, in factorial 12 x 2 x 2 + control treatme
Publicado em: 2009
-
10. Adsorção e dessorção aniônicas individuais por gibbsita pedogenética
Anion adsorption/desorption dynamics was studied as individual processes on surface of particles of a gibbsitic clay. The data suggest a remarkable gibbsite role as nitrate leaching retardant in soil. The opposite behavior of gibbsite towards adsorption/desorption of silicate and phosphate suggests the need of an adequate compromise solution regarding interv
Química Nova. Publicado em: 2009
-
11. Uréia com NBPT em cobertura na cultura do milho
The urea is subject to significant losses of nitrogen by immobilization, mainly by leaching and volatilization, an alternative to minimize these losses is the pretreatment with an inhibitor of urease, the NBPT [N-(n-butyl) thiophosphoric triamide]. The objective was to evaluate, in a commercial field, the effect of coverage on application of different levels
Publicado em: 2009
-
12. Perdas nitrogenadas e recuperação aparente de nitrogênio em fontes de adubação de capim elefante / Nitrogen losses and aparent recovery of nitrogen in sources of fertilization of elephant-gass
The efficiency of nitrogen fertilization is one of the key elements to grass production. The knowledge of nitrogen losses within this practice associated with the application of alternative nitrogen sources provide efficient use and flexibility in choosing between nitrogen fertilizers. The objective of this study was to evaluate nitrate leaching, ammonium vo
Publicado em: 2008