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| Santos,Silvânio R.; Ribeiro,Danilo P.; Matos,Antonio T.; Kondo,Marcos K.; Araújo,Edcássio D.. |
| ABSTRACT We evaluate the application of treated sanitary wastewater (TSW) to provide potassium for crops and reduce demand for fresh water and mineral nutrients. The field experiment was arranged in randomized block design with four replications and five treatments: 50, 100, 150 and 200% of potassium requirements and a control with conventional fertilizer. The TSW was applied to maize (November 2012 to February 2013), cotton (June to November 2013) and bean (April to June 2014). After bean, soil chemical properties were evaluated until 0.8 m depth. Fertigation with TSW to potassium fertilization provided about 50% of water, nitrogen and phosphorus to the bean. The soil nutrient availability and soil organic matter did not increase, whereas sodium had... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Effluent; Fertilization; Irrigation; Sewage; Sodium. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162017000200343 |
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| Araújo,Edcássio D.; Santos,Dionei L.; Alvino,Francisco C. G.; Ferreira,Lucas B.; Cunha,Fernando F. da. |
| ABSTRACT Correct determinations of distribution (Ed) and application (EA) efficiencies allow adequate estimations of the gross irrigation depth. This study aimed: i) to determine the distribution efficiency using the Christiansen uniformity coefficient (CUC) in a sprinkler irrigation system under different weather conditions and working pressures; ii) to compare the mean, median, and cumulative CUC values; and iii) to evaluate the predictive capacity of four EA estimation models. CUC values were determined from 80 assessments, as well as the mean, median, and cumulative. The precipitated water depth accumulated in each collector was considered for the accumulated CUC. More uniform evaluations were used for EA (working pressure of 196 kPa), resulting in 20... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Uniformity coefficient; Irrigation efficiency; Evaporation and wind drift. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162020000100024 |
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| Alves,Pablo F. S.; Santos,Silvânio R.; Kondo,Marcos K.; Pegoraro,Rodinei F.; Araújo,Edcássio D.. |
| ABSTRACT The feasibility of using sewage wastewater as a water and nutrient source for plants is an alternative to harness agricultural natural resource, observing its influence on the organic matter dynamics and soil energy. Our objective here was to evaluate the effects of applying different doses of effluent from a sewage treatment plant, in Janaúba – MG, Brazil, over the physical attributes of a soil grown with “Prata Anã” banana. From soil sample collection at depths of 0-20, 20-40, and 40-60 cm, we determined the following soil properties: soil density, total porosity, macroporosity, microporosity, organic matter, clay dispersed in water and stability of soil aggregate. The experimental design was in randomized blocks with four repetitions.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Musa spp; Agricultural reuse of effluents; Environmental sanitation; Semi-arid. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162015000600998 |
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