Phosphate Fertilizers
Mostrando 13-24 de 97 artigos, teses e dissertações.
-
13. Phosphorus fractions in apple orchards in southern Brazil
ABSTRACT Phosphorus (P) applications at dosages higher than the necessary may cause P buildup in the soil labile fractions and, consequently, pollution of water sources. This study aimed to assess accumulation of P fractions as well as the parameters of adsorption isotherms in soil profiles having a history of application of phosphate fertilizers and cultiva
Bragantia. Publicado em: 29/05/2017
-
14. Broadcast distribution uniformity of fertilizer with centrifugal spreaders used in variable rate application
ABSTRACT The quality of fertilizer distribution process is important to the success of agriculture. This research aimed to study the distribution uniformity of fertilizers with spreaders capable of performing variable rate. Evaluations were carried out in different farms, in the Southwest region of the State of Goiás, Brazil. 13 longitudinal and transversal
Eng. Agríc.. Publicado em: 2016-10
-
15. SUSTENTABILIDADE NO USO DO FÓSFORO: UMA QUESTÃO DE SEGURANÇA HÍDRICA E ALIMENTAR
The phosphorus used as fertilizer in agriculture is extracted from phosphate rocks, which after extraction reacts with sulfuric acid, releasing phosphoric acid, a raw material for the fertilizer industry. Studies point to a possible depletion of world reserves of phosphate rock in the next 50-100 years. A phosphorus scarcity is closely linked to global food
Quím. Nova. Publicado em: 2016-07
-
16. Characterization of Single Superphosphate Powders – a study of Milling Effects on Solubilization Kinetics
Conventional single superphosphate (SSP) is known as one of the most important and common sources of phosphorus in agriculture. Despite SSP has been widely produced as a fertilizer, a few studies have been done to describe the fundamental aspects of this P-fertilizer, i.e., phase composition, thermal degradation behavior, and solubility kinetics. Therefore,
Mat. Res.. Publicado em: 12/02/2016
-
17. Rock biofertilizer and earthworm compost on sugarcane performance and soil attributes in two consecutive years
ABSTRACT The deployment of soluble fertilizers has been one of the most commonly applied agricultural practices in the bid to increase crop yield. However, the production of soluble fertilizers has a considerable economic cost and consumes a substantial amount of energy. In general, soil organic matter provides the nutrients needed for plant growth in organi
Sci. agric. (Piracicaba, Braz.). Publicado em: 2016-02
-
18. Plant growth-promoting bacteria as inoculants in agricultural soils
Abstract Plant-microbe interactions in the rhizosphere are the determinants of plant health, productivity and soil fertility. Plant growth-promoting bacteria (PGPB) are bacteria that can enhance plant growth and protect plants from disease and abiotic stresses through a wide variety of mechanisms; those that establish close associations with plants, such as
Genet. Mol. Biol.. Publicado em: 03/11/2015
-
19. Efeito de enxofre elementar na eficiência de fosfatos naturais / Effect of elemental sulfur on the efficiency of phosphate rocks
É amplamente conhecida a importância do fósforo (P) para a obtenção de boa produtividade de culturas. Sabe-se, também, que a matéria prima para produção de adubos fosfatados é um recurso escasso e não renovável. Utilizações adequadas e alternativas que busquem melhorias da eficiência das fontes de P são de grande importância para o manejo da
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 21/06/2012
-
20. Resposta da cultura do milho aos fertilizantes fosfatados e nitrogenados revestidos com polímeros / Response of maize to polymer-covered phosphate and nitrogen fertilizers
The effective use of fertilizers, besides resulting in greater yield, can reduce production costs, with positive results in the end of the cropping season. Soil correction and fertilization in intensive maize production systems represent, on average, 40% to 45% of the production cost. Phosphorus is considered as a nutrient with low absorption by plants due t
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 06/01/2012
-
21. Fosfato monoamônio revestido com polímeros no plantio das culturas de milho irrigado e cana-de-açúcar
Phosphorus (P) is the most limiting nutrient, in tropical conditions, for crop yield, mostly due to its low contents and high fixation in soils. Moreover, it is common to observe low efficacy of phosphate fertilizers, with plant absorption varying from 20% to 30%. Therefore, the reduction of phosphate fertilizers expenses and, or, increasing its efficacy, co
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 04/01/2012
-
22. Performance of maize landrace under no-till as affected by the organic and mineral fertilizers
The aim of this work was to study the effects of organic and mineral fertilizers at sowing (without fertilizers, organic poultry litter fertilizer on the surface and mineral NK + reactive natural phosphate from Arad and NK + triple superphosphate in the furrow) and topdressing (without fertilizers, organic poultry litter fertilization and urea) on chemical a
Brazilian Archives of Biology and Technology. Publicado em: 2012-04
-
23. Isolamento e caracterização de bactérias promotoras de crescimento vegetal de lavouras experimentais de arroz sob diferentes níveis de fertilização
Chemical fertilization is widely used for increased crop productivity, but its production and use lead to serious environmental damage. To reduce the use of fertilizers, one can make use of plant growth promoting rhizobacteria (PGPR), which are plant-associated bacteria that increase plant health, size and yield through various mechanisms. PGPR effectiveness
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2012
-
24. DINÂMICA DO FÓSFORO NA INTEGRAÇÃO LAVOURA-PECUÁRIA SOB SISTEMA PLANTIO DIRETO / Phosphurus dynamic in crop livestock integration under notillage.
The necessity to preserve the soil, coupled with the constant search for lower production costs and increased productivity resulted in the use no-tillage (NT). Efficient technique in the preservation and use of highly weathered soils (tropical and subtropical soils). However, only the continuous cultivation of monocultures has been implicated in reduced prof
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/11/2011