Solution Extractors
Mostrando 1-12 de 18 artigos, teses e dissertações.
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1. Watermelon fertigation with electrical conductivity and ph monitoring in the soil solution
ABSTRACT In the olericulture, in general, is practiced intensive fertilization, which creates a risk of salinization and change of high pH, which if not well monitored can cause production losses, excessive spending on fertilizers and environmental contamination. We developed this study with the aim of controlling fertigation on watermelon through the behavi
Eng. Agríc.. Publicado em: 2016-08
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2. Vinhaça concentrada de cana-de-açúcar: monitoramento das propriedades químicas do solo e mineralização líquida de nitrogênio / Concentrated vinasse from sugarcane: monitoring of soil chemical properties and net nitrogen mineralization
A geração de grande quantidade de vinhaça resultante da produção de etanol induziu questionamentos a respeito de sua disposição e possível armazenamento. No Estado de São Paulo, a norma P4.231 da CETESB restringiu a aplicação de vinhaça em muitos solos, resultando na necessidade de distribuí-la em áreas distantes da usina. Porém, devido a gran
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 16/07/2012
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3. Reações de obtenção de NOx empregado no processo Humifert para a produção de compostos organofosfatados. / NOx reactions applied in a organophosphated compounds production by Humifert process.
Humiphert process is an alternative used for producing phosphated compound fertilizers with a slower solubilization when compared to other traditional fertilizers, resulting in a longer period of plant nutrition. During the process, phosphatic rocks are used along with some sort of limitation according to the normal development, both by their lower content p
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 25/05/2011
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4. Calibration and management of porous cap soil solution samplers and pressure transducers for monitoring fertigation ions / Calibração e manejo de extratores providos de cápsulas porosas e transdutores de pressão para monitoramento de íons na fertirrigação
The fertigation management with ion concentration control in the soil solution its an alternative technique and feasible economic, however its necessary to calibrate it to be effectively recommended. This work had the aim to determine calibrated equations to monitor the electrical conductivity (EC) and the solution ion concentration in soils of two different
Publicado em: 2010
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5. Monitoring of potassium in a culture of irrigated bell pepper in semiarid region / Monitoramento do potássio em um cultivo de pimentão irrigado em região semiárida / Monitoramento do potássio em um cultivo de pimentão irrigado em região semiárida / Monitoramento do potássio em um cultivo de pimentão irrigado em região semiárida / Monitoring of potassium in a culture of irrigated bell pepper in semiarid region / Monitoring of potassium in a culture of irrigated bell pepper in semiarid region
The bell pepper is of high importance within the vegetable crops, thus becoming an alternative source of income for small producers and family farms. Potassium is the nutrient most absorbed by bell pepper and diffusion the main transport mechanism to the roots, although the mass flow can have significant contribution in the process under high potassium conce
Publicado em: 2010
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6. Efeito do fosfato bicálcico ou monoamônico sobre a digestibilidade ruminal do feno de coast-cross / Effects of dicalcium or monoammonium phosphate on ruminal digestibility of coast-cross hay
The effects of phosphorus from Dicalcium Phosphate (DCP) or Monoammonium Phosphate (MAP) sources were evaluated on in situ ruminal digestibility of coast-cross hay (Cynodon dactylum) and also their solubility using in vitro study. Twelve Suffolk crossbred wethers were used, fitted with ruminal cannulas. The experimental period was divided into two stages: th
Publicado em: 2009
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7. Compostagem de esterco de galinha: composiÃÃo quÃmica da matÃria orgÃnica e extraÃÃo de substÃncias hÃmicas / Chicken manure composting: organic matter composition and humic substances extraction
The agro-industrial activities are responsible for the generation of large amounts of organic waste, and composting is an efficient process for the treatment of such waste; humification degree is an important parameter for determining the quality of the compost produced. This study aims to evaluate the dynamics of humification of organic matter during compos
Publicado em: 2009
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8. Fertigation management in melon crop by soil solution ions control / Manejo da fertirrigação na cultura do meloeiro mediante o controle de íons da solução do solo
A fertirrigação tornou-se uma prática comum entre os agricultores mais tecnificados, constituindo uma das alternativas mais consistentes para se garantir altas produtividades. Tradicionalmente, o manejo da fertirrigação é feito mediante o uso curvas de absorção de nutrientes e recomendações para aplicação de fertilizantes. O monitoramento da conc
Publicado em: 2009
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9. Rendimento do feijoeiro (Phaseolus vulgaris L.) e comparaÃÃo de relaÃÃes solo-soluÃÃes extratoras em Latossolos contaminados por metais pesados / Bean (Phaseolus vulgaris L.) productivity and comparison of the soil relations-extractor solution on Latosol infected by heavy metals
A contaminaÃÃo dos solos por metais pesados tem se tornado uma preocupaÃÃo constante nas Ãltimas dÃcadas. VÃrios estudos tÃm sido realizados sobre os efeitos desses metais em plantas e mÃtodos de anÃlises desses metais no solo. Este estudo em casa de vegetaÃÃo teve como objetivos avaliar os teores de Cd, Pb, Zn e Cu solÃveis em soluÃÃo extrato
Publicado em: 2009
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10. Behavior of dissolved inorganic N in surface and sub-surface waters in a cultivated sugar cane area / Comportamento do N inorgânico dissolvido em águas superficiais e sub-superficiais em área com cultivo de cana-de-açúcar
The sugar cane is an important agricultural activity in Brazil and its productivity is related to several factors, such as the availability of suitable nutrients quantities, with emphasis on the nitrogen. However, the constant use of fertilizers increases the possibility of environmental contamination, mainly in water bodies. In this study were evaluated the
Publicado em: 2008
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11. Validation of the NUTMON model for the diagnosis of agricultural management: study on two family farms in Rio de Janeiro State. / Validação do modelo NUTMON para o diagnóstico do manejo agrícola: Estudo em duas propriedades familiares do Rio de Janeiro.
This study had the following hypothesis: the agricultural production systems adopted by small farmers brings about nutrient negative balances to soil, which causes the loss of soil fertility and crop yield decline in the time span. The general objective of this study was to validate the NUTMON model of the Food and Agriculture Organization of the United Nati
Publicado em: 2008
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12. Níveis de salinidade e manejo da fertirrigação sobre o cultivo do tomateiro (Lycopersicon esculentum Mill) em ambiente protegido / Salinity control and fertigation management on the cultivation of tomato (Lycopersicon esculentum Mill) in greenhouse
Due to the need of increasing the productivity in the agricultural section the use of fertilizers in the production of food was increased, causing among other things the salinization of the soil, the consequences for the humankinds health and the environmental impact that are not totally known. This work had as objective evaluate the effect of different leve
Publicado em: 2007