Results 61 to 70 of about 26,126 (298)

Extraction Kinetics and Molecular Size Fractionation of Humic Substances From Two Brazilian Soils

Journal of the Brazilian Chemical Society, 1999
In the present study, the extraction behaviour of humic substances (HS) from an Oxisol and a Mollisol from South Brazil, by using 0.1 and 0.5 mol L-1 NaOH and 0.15 mol L-1 neutral pyrophosphate solutions, respectively, was systematically studied.
Dick Deborah Pinheiro, Burba Peter
doaj  

Imazaquin sorption in surface and subsurface soil samples Sorção do imazaquin em amostras de solos superficiais e subsuperficiais

Pesquisa Agropecuária Brasileira, 2006
The objective of this work was to study the sorption and desorption of imazaquin, in surface and subsurface soil samples from Brazil. Sorption and desorption steps were carried out using batch equilibration and high performance liquid chromatography ...
Maurílio Fernandes de Oliveira, Hélio Teixeira Prates, Derli Prudente Santanna, Rubem Silvério de Oliveira Júnior   +3 more
doaj   +1 more source

Physical quality of an oxisol under different uses [PDF]

Revista Brasileira de Ciência do Solo, 2012
The use of a soil induces changes in the physical properties according to the management, tillage intensity and type of crop. The objective of this work was to measure the alterations of some of the soil physical properties and evaluate the physical quality by the S index, an indicator proposed by Dexter (2004), comparing the land uses: eucalyptus ...
Mota, Francisco Ocian Bastos, Ness, Ricardo Luiz Lange, Mota, Jaedson Cláudio Anunciato, Clemente, Celso Augusto, Sousa, Sebastião Cavalcante   +4 more
openaire   +4 more sources

Effects of Meloidogyne incognita on agronomic parameters and structural changes in eggplant (Solanum gilo Raddi) roots treated with Purpureocillium lilacinum

Plant Biology, EarlyView.
Meloidogyne incognita impairs eggplant growth through gall formation with changes in root cell wall components and vascular tissue disruption, while the biocontrol agent Purpureocillium lilacinum mitigates these effects by reducing nematode infection. Abstract Meloidogyne spp. induce structural changes during the development of root‐knot galls, leading
R. M. I. F. Vilela, V. C. Kuster, A. A. de Souza, V. C. Martini, T. A. Magalhães, R. M. dos Santos Isaias, D. C. de Oliveira   +6 more
wiley   +1 more source

Dispersão de argila em microagregados de solo incubado com calcário Clay dispersion in microaggregates of soil incubated with limestone

Revista Brasileira de Ciência do Solo, 2008
A compactação do solo restringe o rendimento de culturas de grãos. Dentre outros fatores, a calagem pode favorecer a dispersão de microagregados e a formação de camadas compactadas.
Silvio Tulio Spera, José Eloir Denardin, Pedro Alexandre Varella Escosteguy, Henrique Pereira dos Santos, Enrique Alberto Figueroa   +4 more
doaj   +1 more source

Nitrogen dynamics in soils cultivated with maize and fertilized with pig slurry. [PDF]

, 2017
The proper disposal of pig manure is of great importance because, when mishandled, it can contaminate water resources. This study aimed to evaluate the nitrogen dynamics in a Cerrado Oxisol and its absorption, over time, by a maize crop managed with pig ...
ALVES, M. E. B., AMARAL, T. A., ANDRADE, C. L. T., HICKMANN, C., RESENDE, A. V., SILVA, D. de F.   +5 more
core   +1 more source

Lime and calcium-magnesium silicate in the ionic speciation of an Oxisol

, 2017
Plant residues and certain fertilizers accelerate soil acidification and increase the levels of aluminum-Al+3 in soils under no-tillage (NT). Silicates act as acidity amendments and as a source of silicon as in H4SiO4.
J. Antonangelo, J. F. Neto, C. Crusciol, L. Alleoni   +3 more
semanticscholar   +1 more source

Sustaining Cocoa Production on Oxisols in Malaysia [PDF]

, 2015
Oxisols are dominated by variable charge minerals in their clay fraction, containing an insufficient amount of Ca and Mg in their soil solutions. Under natural conditions, cocoa grown on the soils is subjected to the stress of low pH and Al and/or Mn toxicity, which eventually produces low yields.
Jusop, Shamsuddin, Panhwar, Qurban Ali, Ismail, Roslan, Che Ishak, Fauziah, Naher, Umme Aminun, Hakeem, Khalid Rehman   +5 more
openaire   +1 more source

Nitrogen dynamics as a function of pH in soil cultivated with brachiarias

Agrosystems, Geosciences &Environment, Volume 9, Issue 1, March 2026.
Abstract Brachiaria production is an important segment in Brazil's agriculture, used as a forage or animal feed. Studying the influence of Brachiaria sp. on soil nitrogen (N) dynamics under different soil pH and amendment conditions is a critical research need.
Jhonatas Gomes dos Reis, Gustavo Castoldi, Luiz Henrique Almeida da Silva, Ciro Antonio Rosolem, Osler Ortez   +4 more
wiley   +1 more source

Least limiting water range and degree of compactness of soils under no- tillage

Bioscience Journal, 2015
The least limiting water range (LLWR) and degree of compactness (DC) can be useful indicators of soil physical quality and crop yield. This study focused on assessing of LLWR, DC and evaluation of critical values to crop growth of an Alfisol and Oxisol ...
Claudia Liane Lima, Luis Akiyoshi Suzuki, Dalvan José Reinert, José Miguel Reichert   +3 more
doaj   +3 more sources