Results 21 to 30 of about 648,160 (293)

Atributos químicos de solos influenciados pela substituição do carbonato por silicato de cálcio Soil chemical properties influenced by the substitution of calcium carbonate by calcium silicate

Revista Brasileira de Ciência do Solo, 2008
A aplicação de silicatos pode promover incrementos na capacidade de troca de cátions, favorecer a disponibilização de ânions, especialmente o H2PO4- (fosfato diácido), elevar o pH, amenizar a toxidez de Al e, de maneira geral, incrementar a ...
Renato Ferreira de Souza, Valdemar Faquin, Ruy Carvalho, Paulo Rogério Ferreira Torres, Adélia Aziz Alexandre Pozza   +4 more
doaj   +1 more source

What is an adequate sample size? Operationalising data saturation for theory-based interview studies [PDF]

, 2010
In interview studies, sample size is often justified by interviewing participants until reaching “data saturation”. However, there is no agreed method of establishing this.
Eccles, M. P., Entwistle, V., Francis, J., Johnston, M., Entwistle, Vikki Ann, Eccles, Martin P., Robertson, Clare, Grimshaw, J. M., Grimshaw, Jeremy M, Francis, Jill J., Grimshaw, Jeremy M., Robertson, C., Glidewell, L., Glidewell, Liz, Johnston, Marie, Francis, Jill J, Entwistle, Vikki, Eccles, Martin P   +17 more
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Relações entre os tipos e indicadores de acidez do solo em lavouras no sistema plantio direto na região do Planalto do Rio Grande do Sul Relationships among acidity types and indicators in soils under no-tillage system in the Rio Grande do Sul Planalto Region

Revista Brasileira de Ciência do Solo, 2008
A recente mudança no sistema de cultivo do solo ocorrida no Brasil, passando do preparo convencional (PC) para o sistema plantio direto (SPD), altera o funcionamento do solo. No solo cultivado no SPD, as relações se estabelecem no tempo e são preservadas
Margarete Nicolodi, Ibanor Anghinoni, Clesio Gianello   +2 more
doaj   +1 more source

huixin aluminum(3）.jpg

, 2020
Huixin Aluminum has been selling all around China and the world. We always put the customer first before all, which leads to the operation of the company. Today, we have advanced equipment to ensure quality, we have qualified logistics supplier to ensure
Huixin Aluminum (8695332)
core   +1 more source

Indicadores da acidez do solo para recomendação de calagem no sistema plantio direto Soil acidity indicators for liming in no-tillage systems

Revista Brasileira de Ciência do Solo, 2008
O tempo de cultivo do solo no sistema plantio direto (SPD) altera a magnitude das relações entre os componentes da acidez do solo e o rendimento das culturas. Altos rendimentos podem ser obtidos nesse sistema mesmo em áreas com alta acidez.
Margarete Nicolodi, Ibanor Anghinoni, Clesio Gianello   +2 more
doaj   +1 more source

SUGARCANE BAGASSE ASH DOSES AFFECT SOIL CHEMICAL ATTRIBUTES AND PIGEON PEA INITIAL PERFORMANCE

Revista de Agricultura Neotropical, 2023
Brazil stands out in the international scenario as the largest producer of sugarcane, processing billions of tons. Thus, this activity generates residues, such as ashes from bagasse burning and straw from sugarcane cleaning and from the production of ...
Giovana Oliveira Rubio, Diego Oliveira Ribeiro, Zaqueu Henrique de Souza, Rogério Machado Pereira, Jonathan Goularte Silva, Bruno Dalmolin   +5 more
doaj   +1 more source

Soil hydromorphy and aluminum saturation shape tree community composition in a riparian ecotone, Paraná, Brazil

Brazilian Journal of Biology
Riparian ecotones host sharp hydrological-edaphic gradients that can restructure tree communities. We tested how soil hydromorphy and related attributes shape floristic composition in a 7.6-ha ecotone on the eastern boundary of Iguaçu National Park ...
H. M. Munhoz, B. S. Francisco, M. B. Remor, J. Cordeiro, S. C. Sampaio, L. G. Temponi   +5 more
doaj   +1 more source

Crescimento em vasos, de cultivares de soja e de trigo em função da saturação de alumínio Tolerance of soybean and wheat varieties in sub-soil high in exchangeable aluminum

Scientia Agricola, 1995
Um dos problemas que a acidez do solo causa às plantas é concentrar alguns elementos químicos em nível tóxico, como por exemplo de alumínio (Al) e manganês.
H.A.A. Mascarenhas, R.T. Tanaka
doaj   +1 more source

Visualization of Aluminum Dust Flame Propagation in a Square-Section Tube

Chemical Engineering Transactions, 2018
Metallic dust explosion is a challenging research topic. One key point of investigation is the flame propagation velocity, which can be determined experimentally by direct visualization of the explosions.
Clement Chanut, Frederic Heymes, Pierre Lauret, Pierre Slangen   +3 more
doaj   +1 more source

Alloying effect of copper in AA-7075 aluminum composite using bale out furnace

Journal of Materials Research and Technology, 2022
This study investigated the effect of copper addition on AA-7075 aluminum alloy's microstructure and mechanical behavior. Aluminum alloy with copper reinforcement varying between 0.3 and 0.7 wt.% was produced using the stir casting technique.
O.J. Akinribide, O.D. Ogundare, S.O. Akinwamide, Fehmi Gamaoun, P.A. Olubambi   +4 more
doaj   +1 more source