Results 11 to 20 of about 136,707 (154)

Canalized to heat, plastic to cold: adaptive coordination of leaf and seed strategies in populations spanning an elevational gradient. [PDF]

open access: yesNew Phytol
Summary In tropical mountains, surviving temperature extremes demands finely tuned strategies. We investigated how populations of the bromeliad Pitcairnia flammea across a 2200 m elevational gradient balance genetic canalization and plasticity, and whether thermal strategies are coordinated between seeds and leaves.
Chaves CJN   +17 more
europepmc   +2 more sources

Diverse anthropogenic disturbances shift Amazon forests along a structural spectrum

open access: yesFrontiers in Ecology and the Environment, Volume 21, Issue 1, Page 24-32, February 2023., 2023
Amazon forests are being degraded by myriad anthropogenic disturbances, altering ecosystem and climate function. We analyzed the effects of a range of land‐use and climate‐change disturbances on fine‐scale canopy structure using a large database of profiling canopy lidar collected from disturbed and mature Amazon forest plots.
Marielle N Smith   +51 more
wiley   +1 more source

AMAZONIA CAMTRAP: A data set of mammal, bird, and reptile species recorded with camera traps in the Amazon forest

open access: yesEcology, Volume 103, Issue 9, September 2022., 2022
Abstract The Amazon forest has the highest biodiversity on Earth. However, information on Amazonian vertebrate diversity is still deficient and scattered across the published, peer‐reviewed, and gray literature and in unpublished raw data. Camera traps are an effective non‐invasive method of surveying vertebrates, applicable to different scales of time
Ana Carolina Antunes   +158 more
wiley   +1 more source

Soil dissolved organic carbon responses to sugarcane straw removal

open access: yesSoil Use and Management, Volume 37, Issue 1, Page 126-137, January 2021., 2021
Abstract Global demand for bioenergy increases interest in biomass‐derived fuels, as ethanol from sugarcane straw. However, straw is the main carbon source to soil and its removal reduces C input, affecting active fractions (dissolved organic carbon, DOC) and C storage.
Maria Regina Gmach   +6 more
wiley   +1 more source

Indicadores de sustentabilidade para sistemas agroflorestais: levantamento de metodologias e indicadores utilizados [PDF]

open access: yesRevista de Economia e Sociologia Rural, 2022
Resumo Os sistemas agroflorestais (SAFs) se apresentam viáveis para a agricultura familiar como alternativa à agricultura convencional. Para avaliar a sustentabilidade desses sistemas, pode-se fazer uso de indicadores.
Fabiana Aparecida da Silva Araújo   +3 more
doaj   +1 more source

Can Additional Inoculations Increase Soybean Nodulation and Grain Yield?

open access: yesAgronomy Journal, Volume 110, Issue 2, Page 715-721, March–April 2018., 2018
Core Ideas A full set of N2–fixing nodules can supply soybean N demands.Seed inoculation increased nodulation and grain yield of field‐grown soybean.Additional spray inoculations (V1, V3, V6, R1, or R3) resulted in further increases.New nodules and grain yield increases can be achieved by additional inoculations. Highly productive soybean [Glycine max (
Luiz Gustavo Moretti   +6 more
wiley   +1 more source

Agricultura sustentável nos trópicos

open access: yesEstudos Avançados, 2001
A Agricultura sustentável deve envolver o manejo eficiente dos recursos disponíveis para satisfazer às crescentes aspirações de uma também crescente população, mantendo ou melhorando a qualidade do ambiente e conservando os recursos naturais.
Ernesto Paterniani
doaj   +1 more source

Commercialization of hormonal herbicides and proposal for a risk analysis of their use in municipalities in the Rio Grande do Sul State, Brazil

open access: yesPesquisa Agropecuária Gaúcha
Analysis of the trade of hormonal herbicides in cities in Rio Grande do Sul provides important guidance for regulatory and educational actions. The aim of this study was to carry out a diagnositic of commercialization in municipalities in the Campanha ...
Michelle Cristine Rodrigues Gomes   +5 more
doaj   +1 more source

CONTRIBUIÇÕES DO PRONAF PARA A AGRICULTURA FAMILIAR

open access: yesRevista Extensão & Cidadania, 2016
Este artigo relata a produção agrícola familiar, Programa Nacional de Apoio à Agricultura Familiar (PRONAF), no Brasil, no Nordeste e na Bahia, bem como discute questões referentes ao uso sustentável dos recursos naturais por esta modalidade de ...
Adriana Ribeiro Mota
doaj   +1 more source

Modelos de produção agroecológica familiar: o caso dos distritos de Metuge e Gondola, Moçambique

open access: yesRevista Verde de Agroecologia e Desenvolvimento Sustentável, 2022
A produção agroecológica é uma estrutura abrangente para o uso sustentável da biodiversidade que também apoia a produtividade e a resiliência. Os agricultores se beneficiam de sistemas diversificados por meio de maior resiliência econômica, redução da ...
Rafael Francisco Nanelo   +1 more
doaj   +1 more source

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