Results 101 to 110 of about 17,132 (282)

Characterization of cover crops by NMR spectroscopy: impacts on soil carbon, nitrogen and phosphorus under tillage regimes

open access: yesRevista Ciência Agronômica, 2014
The objective of this study was to investigate the chemical composition of cover crops by solid-state CPMAS 13C NMR spectroscopy and its effects on carbon, nitrogen and phosphorus in a Typic Acrustox.
Arminda Moreira de Carvalho   +4 more
doaj  

Oxidative Damage, Energy Imbalance, and Behavioral Disruptions in Girardia tigrina Exposed to Treated Sewage Effluents

open access: yesEnvironmental Toxicology, EarlyView.
ABSTRACT This study assessed the ecotoxicological effects of treated sewage on the freshwater planarian Girardia tigrina, integrating biochemical, energetic, and behavioral biomarkers. Planarians were exposed for 48 h to different concentrations of treated sewage (12.5%, 25%, 50%, and 100%) and compared to controls using commercial water and water from
Renata M. P. Freitas   +3 more
wiley   +1 more source

IMPACTO DO MANEJO CONVENCIONAL SOBRE PROPRIEDADES FÍSICAS E SUBSTÂNCIAS HÚMICAS DE SOLOS SOB CERRADO IMPACT OF CONVENTIONAL MANAGEMENT UPON BOTH PHYSICAL PROPERTIES AND HUMIC SUBSTANCES OF SOILS UNDER CERRADO

open access: yesCiência Rural, 2001
A utilização do manejo convencional em solos sob cerrado tem acarretado modificações nas suas propriedades, bem como no comportamento e qualidade da sua matéria orgânica.
Tony Jarbas Ferreira Cunha   +5 more
doaj   +1 more source

Antimicrobial Residues in a Key Cerrado River: Distribution, Persistence, and Effects on Zebrafish Embryo‐Larval Development

open access: yesEnvironmental Toxicology, EarlyView.
ABSTRACT The current study aimed to quantify the antimicrobials amoxicillin (AMX), cefazolin (CFZ), chloramphenicol (CHL), metronidazole (MTZ), and sulfamethoxazole (SX) in effluents and surface water of an important Cerrado river, calculate their half‐lives, and analyze their ecotoxicity following single and combined exposures.
Náthala Maria Simão   +12 more
wiley   +1 more source

Influência da antibiose exercida por actinomicetos às estirpes de Bradyrhizobium SPP., na nodulação da soja Influence of antibiosis produced by actinomycetes on strains of Bradyrhizobium SPP. on soybean nodulation

open access: yesPesquisa Agropecuária Brasileira, 1999
Este trabalho teve por objetivo avaliar o espectro antibiótico de actinomicetos provenientes de solos de Cerrados e a sua influência na nodulação da soja.
João Carlos Pereira   +2 more
doaj   +1 more source

Cerrados: sua biodiversidade é uma benção da natureza - anais.

open access: yes, 2011
Monitoramento de areas de cerrado atraves da utilizacao de tecnicas de sensoriamento remoto e geoprocessamento; Zoneamento agroclimatico para graos na regiao do Meio-Norte brasileiro; Principais classes de solos com ocorrencia de cerrado no Meio-Norte ...
SIMPOSIO SOBRE OS CERRADOS DO MEIO-NORTE, 1., 1997, Teresina, PI.
core  

Long‐term changes in functional diversity and its implications for mammalian conservation and ecological restoration in a grassland ecosystem

open access: yesFunctional Ecology, EarlyView.
Read the free Plain Language Summary for this article on the Journal blog. Abstract Paleontological data provide information on natural environments prior to human influence, which are useful for tracking changes in ecosystem functioning through time. During the Late Pleistocene, about 10% of terrestrial mammalian species were extinct in South America.
Thayara S. Carrasco   +3 more
wiley   +1 more source

Inovações Técnicas e suas Relações com Inovações Sociais e Institucionais no Norte de Minas:

open access: yesSustentabilidade em Debate, 2015
O presente trabalho visa apresentar alguns aspectos da relação entre inovações técnicas, sociais e institucionais em comunidades de agricultores familiares de Rio Pardo de Minas, norte de Minas Gerais, no sentido de buscar diálogos com a construção do ...
João Roberto Correia   +1 more
doaj  

Manual de usuário do fórum eletrônico da Embrapa Cerrados. [PDF]

open access: yes, 2011
: This paper is an user's manual for the phpBB2, a bulletin board package (BBS) developed by the phpBB Group. It's an Open Source software chosen, experimentally, as a knowledge management tool to improve research and development activities at Embrapa ...
KINPARA, D. I.
core  

Open letter: A call to integrate plant regeneration into sustainability science and policy

open access: yes
PLANTS, PEOPLE, PLANET, EarlyView.
Fernando A. O. Silveira   +16 more
wiley   +1 more source

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