Longterm Field Experiment
Mostrando 1-12 de 27 artigos, teses e dissertações.
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1. Effects of Reduced and Conventional Tillage on Weed Communities: Results of a Long-Term Experiment in Southwestern Spain
RESUMO: Uma desvantagem importante na adoção de técnicas de cultivo mínimo (MT) e plantio direto (NT) é o deslocamento de plantas daninhas frequentemente observado, promovendo espécies adaptadas e, com isso, um controle de plantas daninhas mais precário. Essas mudanças só podem ser detectadas com experimentos de longo prazo, e os resultados podem di
Planta daninha. Publicado em: 02/12/2019
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2. Characterization of the Weed Flora in Rice Areas under Distinct Cropping Systems and Herbicide Managements
RESUMO: O objetivo deste trabalho foi avaliar a ocorrência de plantas daninhas em arroz irrigado por inundação, em função do sistema de plantio e do manejo de herbicidas na safra anterior. O experimento foi instalado em campo, em delineamento experimental de blocos casualizados dispostos em esquema fatorial 3 x 2, com oito repetições. O fator A foi o
Planta daninha. Publicado em: 30/09/2019
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3. Emissions of Nitrous Oxide and Methane in a Subtropical Ferralsol Subjected to Nitrogen Fertilization and Sheep Grazing in Integrated Crop-Livestock System
ABSTRACT Brazilian agriculture contributes significantly to nitrous oxide (N2O) and methane (CH4) emissions, so the understanding of such emissions at the field is crucial for mitigation strategies. This study quantified the impact of N application and sheep grazing on the N2O and CH4 emissions from a subtropical Ferralsol under an integrated crop-livestock
Rev. Bras. Ciênc. Solo. Publicado em: 19/06/2019
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4. Does Ferralsol Clay Mineralogy Maintain Potassium Long-Term Supply to Plants?
ABSTRACT Ferralsols ( Latossolos ) should contain few or no 2:1 clay minerals and have low potassium (K) contents, and consequently low levels of non-exchangeable K forms are expected. The aim of this study was to evaluate how the clay mineralogy of a Ferralsol affects the soil K dynamics in response to K fertilization during cropping and whether the clay mi
Rev. Bras. Ciênc. Solo. Publicado em: 15/04/2019
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5. Effects of Long-Term Fertilization Management Practices on Soil Microbial Carbon and Microbial Biomass in Paddy Soil at Various Stages of Rice Growth
ABSTRACT Soil microbial biomass plays a significant role in soils, and it is often used as an early indicator of change in soil quality. Soil microbial biomass is affected by different fertilization management practices. Therefore, the impact of different long-term fertilization management practices on the soil organic carbon (SOC) content, soil microbial bi
Rev. Bras. Ciênc. Solo. Publicado em: 03/05/2018
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6. SWINE WASTEWATER: IMPACTS ON SOIL, PLANT, AND LEACHATE
ABSTRACT: The use of animal-origin residues as a nutrient source without prior and proper investigations on their positive and negative impacts can affect the quality of agricultural soils and the environment into which they are inserted. In this sense, the aim of this study was to assess the impact of swine wastewater and mineral fertilization application o
Eng. Agríc.. Publicado em: 2017-09
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7. Medidas do fluxo de CO2 do solo pelos métodos da absorção alcalina e analisador de gás infravermelho em diferentes sistemas de manejo no Cerrado.
RESUMO: Avaliou-se, neste trabalho, o efeito de sistemas de manejo no fluxo de CO2 do solo numa rotação soja-milho, durante um período de 398 dias, de abril de 2000 a maio de 2001, em um Latossolo Vermelho-Escuro argiloso, na Embrapa Cerrados, em Planaltina, Distrito Federal. Foram selecionadas uma área com vegetação de Cerrado (CE) e seis parcelas de
Planaltina. Publicado em: 2011
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8. Specific schistosomiasis treatment as a strategy for disease control
The great hope for schistosomiasis treatment began with the development of oxamniquine and praziquantel. These drugs can be administered orally in a single dose and have a high curative power with minor side effects. In this study, we carried out a field experiment involving a population of 3,782 people. The population was examined at four localities in Mina
Memórias do Instituto Oswaldo Cruz. Publicado em: 2010-07
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9. Teor e qualidade de substâncias húmicas de planossolo sob diferentes sistemas de cultivo / Content and quality of humic substances of a Albaqualf under different management systems
Este trabalho teve por objetivo avaliar e comparar os teores e as características químicas das substâncias húmicas (SHs) de um Planossolo háplico submetido a diferentes sistemas de cultivos de arroz. Amostras de solo foram coletadas em um experimento de longa duração (19 anos) nas profundidades de 0-0,025, 0,025-0,05, 0,05-0,20m e no topo do horizonte
Publicado em: 2010
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10. Organic matter in Albaqualf as affected by managements irrigated rice cropping systems the South from Brazil / Matéria orgânica em Planossolo Háplico sob sistemas de manejo no cultivo do arroz irrigado no Sul do Brasil
In the south region from Rio Grande do Sul State, in,Brazil, 950 thousand hectares of soils are cultivated with rice, an important agricultural activity in that region, under an irrigation (flooded) system, using different soil management techniques. Studies regarding the organic matter (OM) dynamic in these soils are incipient, so this work aimed to evaluat
Publicado em: 2010
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11. Biomassa microbiana em diferentes sistemas de manejo do solo e de culturas típicas da região norte do Paraná
The objective of this work was to evaluate the soil microbial biomass (SMB) as a parameter bioindicador of changes in agroecosystem under different soil management and crop rotation systems. The SMB was examined in four different Long-term experiments: In experiment 1: with 26 year-old field experiment established consisting of four systems soil management:
Publicado em: 2008
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12. ATRIBUTOS QUÍMICOS DE UM LATOSSOLO E OMPORTAMENTO DO TRIGO E DA SOJA NO SISTEMA PLANTIO DIRETO INFLUENCIADOS PELA APLICAÇÃO E REAPLICAÇÃO DE GESSO AGRÍCOLA PONTA GROSSA PR
Gypsum application provides chemical changes on soil that can improve crop yield. This study was carried out to investigate the gypsum application and reapplication effects on soil chemical attributes, mineral nutrition and wheat and soybean grain yields under a no-till system. A field experiment was established in 1998 on a dystrophic clayey Rhodic Hapludox
Publicado em: 2008