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Effectiveness of Current Fertilizer Recommendations for Irrigated Rice in Integrated Crop-Livestock Systems Rev. Bras. Ciênc. Solo
Carmona,Felipe de Campos; Anghinoni,Ibanor; Mezzari,Célito Pescador; Martins,Amanda Posselt; Carvalho,Paulo César de Faccio.
ABSTRACT: Irrigated rice in the state of Rio Grande do Sul (Brazil) has shown significant growth in yield in recent years due to improved management practices, especially in regard to fertilizer use. However, the response curves that led to the current fertilizer recommendations do not consider integrated systems prevailing in rice-producing regions that have adopted the practice of integrated crop-livestock systems. The aim of the present study was to evaluate the effectiveness of current fertilizer recommendations for irrigated rice in lowland soils in Rio Grande do Sul under integrated crop-livestock systems for different periods of time. The experiments were performed in the 2012/2013 growing season on four farms in the state with different forage...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Economic response to fertilization; Lowland soils.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832016000100546
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Developing a Soil Physical Quality Index (SPQi) for lowlands under different deployment times of no-tillage Scientia Agricola
Reis,Diony Alves; Lima,Claudia Liane Rodrigues de; Bamberg,Adilson Luís.
ABSTRACT: Soil physical quality in lowlands from the Pampa biome under no-tillage (NT) plays an important role; therefore, this study aimed to establish a soil physical quality index (SPQi) from a minimum data set to detect the effects of different deployment times of NT in an Albaqualf. The comparison of areas with one (NT1), three (NT3), five (NT5) and seven (NT7) years of notillage was established using as reference a non-cultivated field plot (NC) for at least thirty years, nearby the sites under NT. Soil samples with undisturbed and disturbed structure were collected to determine the physical quality indicators and soil organic matter (SOM) fractions. The factor analysis (FA) was used to identify and select a minimum data set. The SPQi was elaborated...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Factor analysis; Minimum data set; Management systems; Lowland soils.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162019001200157
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