Soil Water Balance
Mostrando 13-24 de 129 artigos, teses e dissertações.
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13. CROP DATA RETRIEVAL USING EARTH OBSERVATION DATA TO SUPPORT AGRICULTURAL WATER MANAGEMENT
ABSTRACT Accurate crop data are essential for reliable irrigation water requirements (IWR) calculations, which can be acquired during the crop growth season for a given region using earth observation (EO) satellite time series. In addition, a relationship between crop coefficients and the NDVI can be established to allow for crop evapotranspiration estimatio
Eng. Agríc.. Publicado em: 19/06/2019
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14. WIND EFFECTS ON FOUNDATIONS OF SILOS AND LIGHT STRUCTURES: SOLUTION BY USE OF STEEL PILES IN DIABASIC SOIL
ABSTRACT Wind solicitations generate horizontal, tensile, and compressive stresses on building foundations. In empty light structures, such as agricultural greenhouses and, in the specific case of silos and elevated structures such as metal water tanks, the consideration of these loads becomes important because the lack of the weight component due to the sto
Eng. Agríc.. Publicado em: 19/06/2019
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15. Actual evapotranspiration and crop coefficient of sweet orange during the initial development phase in the Rio Largo region, Alagoas
RESUMO: A determinação da evapotranspiração real da cultura (ETa) é importante para o manejo da irrigação. Os principais métodos e modelos físicos de estimativa da ETa requerem dados que não são facilmente disponíveis. Neste trabalho, obteve-se o coeficiente da cultura (Kc) da laranja lima na fase inicial de desenvolvimento e avaliou-se o desemp
Cienc. Rural. Publicado em: 30/05/2019
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16. Oomicetos (Oomycota) no Complexo Açude Joana, Pedro II, Piauí, Brasil
Resumo Os oomicetos (Oomycota) são organismos importantes no equilíbrio de diversos ecossistemas terrestres e aquáticos, atuando na ciclagem de nutrientes. Este estudo objetivou conhecer a diversidade de oomicetos no Complexo Açude Joana, no município de Pedro II, Piauí. Em amostras de água e solo foram identificados 20 táxons, pertencentes a 10 gên
Rodriguésia. Publicado em: 25/04/2019
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17. Development, calibration and validation of weighing lysimeters for measurement of evapotranspiration of crops
RESUMO O processo de evapotranspiração é fundamental em estudos de balanço e demanda hídrica de culturas e sua determinação pode ser realizada por diversos métodos. Um método muito utilizado, apesar de seu custo elevado de instalação são os lisímetros de pesagem, que consistem em uma caixa sobre uma balança, conectados a uma célula de carga qu
Rev. bras. eng. agríc. ambient.. Publicado em: 2019-04
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18. IMPACT OF LAND USE CHANGE ON THE WATER BALANCE IN A REPRESENTATIVE WATERSHED IN THE SEMIARID OF THE STATE OF PERNAMBUCO USING THE SWAT MODEL
ABSTRACT The Brazilian semiarid region present high rainfall variability and long dry periods. Thus, the main springs and streams are generally intermittent, and both native vegetation and human activities have a strong influence on hydrological processes and the water yield in the watershed. The aim of this study was to investigate the impacts of reforestat
Eng. Agríc.. Publicado em: 2019-02
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19. Spatial and Temporal Potential Groundwater Recharge: the Case of the Doce River Basin, Brazil
ABSTRACT: Little is known about the groundwater recharge potential of weathered tropical catchments, where increasing water uptake is widespread to meet various water demands. This study aimed to estimate the volume of groundwater recharge of the Doce River Basin, Minas Gerais, Brazil. The BALSEQ model was applied to calculate the water balance over a period
Rev. Bras. Ciênc. Solo. Publicado em: 20/12/2018
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20. TIME AVAILABLE FOR SPRAYING AND MECHANIZED SOWING IN THE NORTHEAST OF THE STATE OF MATO GROSSO DO SUL AND SOUTH OF GOIÁS
ABSTRACT The sizing of mechanized agricultural systems depends on the soil and climatic conditions, the crop and the work regime. The aim of this study was to determine the probabilities of time available during an agricultural year for mechanized spraying and sowing in the northeast region of the State of Mato Grosso do Sul and south of Goiás. The meteorol
Eng. Agríc.. Publicado em: 2018-06
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21. Water extraction and implications on soil moisture sensor placement in the root zone of banana
ABSTRACT: The knowledge on spatial and temporal variations of soil water storage in the root zone of crops is essential to guide the studies to determine soil water balance, verify the effective zone of water extraction in the soil and indicate the correct region for the management of water, fertilizers and pesticides. The objectives of this study were: (i)
Sci. agric. (Piracicaba, Braz.). Publicado em: 2018-04
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22. Energy balance partitioning and evapotranspiration from irrigated Muskmelon under Semi-Arid Conditions
ABSTRACT The Mossoró-Assu-Baraúna district, Rio Grande do Norte State (RN), is recognized by the intense production of horticulture, mainly muskmelon for export. However, this region is often devastated by intense droughts. Thus, the muskmelon production is predominantly under irrigated condition and, due to constant threat of water resources collapse on t
Bragantia. Publicado em: 2018-03
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23. REFERENCE EVAPOTRANSPIRATION FORECASTING BY ARTIFICIAL NEURAL NETWORKS
ABSTRACT: Evapotranspiration (ET) is the main component of water balance in agricultural systems and the most active variable of the hydrological cycle. In the literature, few studies have used the forecast the day before via Artificial Neural Networks (ANNs) for the northern region of São Paulo state, Brazil. Therefore, this aimed to predict the reference
Eng. Agríc.. Publicado em: 2017-12
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24. Genesis of Soils from Bauxite in Southeastern Brazil: Resilication as a Soil-Forming Process
ABSTRACT Pedological studies using X-ray diffraction (XRD), X-ray fluorescence (XRF), optical microscopy, and scanning electron microscopy (SEM-EDS) showed a Xanthic Ferralsol formed from the degradation of bauxite on a slope in the Caparaó region, in southeastern Brazil. We found a decrease in the number and size of bauxite fragments toward the top of the
Rev. Bras. Ciênc. Solo. Publicado em: 09/11/2017