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| Matsinhe,Daniel Zefanias; Pereira,Silvio Bueno; Oliveira,Rubens Alves de; Assis,Igor Rodrigues de; Oliveira,Reginaldo Miranda. |
| ABSTRACT Irrigation has a great importance in the production of food, and it is responsible for consuming a large part of the water used by human activities. This makes the rational management of water use fundamental for sustainable food production. For this purpose, the determination of bulk density is important and needs to be obtained with the simplest, least onerous methods possible, while maintaining precision and accuracy. Therefore, the objective of this work was to evaluate the use of PVC pipes of different dimensions to determine bulk density. For comparison purposes, the volumetric ring, paraffin clod, beaker and excavation methods were also used. Deformed and undisturbed soil samples of different granulometries were collected at the depths of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Water use; Irrigated agriculture; Soil management. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902019000100027 |
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| Silva,Felipe Bernardes; Pereira,Silvio Bueno; Martinez,Mauro Aparecido; Silva,Demetrius David da; Vieira,Nayara Paula Andrade. |
| ABSTRACT The present work was performed by applying the principal component analysis, in order to compare the water needs of banana, mango, grape, sugarcane, maize and beans crops in different regions of the São Francisco river basin, aiming to identify the climate elements that most influence the reference evapotranspiration (ET0) in the locations of Pirapora-MG, Jaíba-MG, Barreiras-BA and Petrolina-PE. In addition, the locations with more similarities, according to the evaluated parameters, were verified by applying cluster analysis, and the equivalence relations between the studied crops were determined by integrating the parameters related to the climatic elements and the characteristics of crops and soils. Based on the principal components analysis,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Irrigated agriculture; Crop water balance; Climatic parameters; Evapotranspiration. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902018000300409 |
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