3 documents found, page 1 of 1
Indicators for evaluation of model performance: irrigation hydraulics applications
Sobenko, Luiz Ricardo; Pimenta, Bruna Dalcin; Camargo, Antonio Pires de; Robaina, Adroaldo Dias; Peiter, Marcia Xavier; Frizzone, José AntonioSeveral mathematical models have been developed for applications in the hydraulics of irrigation systems and several performance indicators of these models are used and suggested by the literature. Thus, the objective of this work was to investigate the performance of statistical indicators for the evaluation of models in irrigation hydraulics. For this, three case studies which represent typical irrigation hyd...
Graphite action on the longitudinal distribution of soybean seeds in mechanical...
Savi, Daniel; Jasper, Samir Paulo; Zimmermann, Gabriel Ganancini; Kmiecik, Leonardo Leonidas; Strapasson Neto, Lauro; Sobenko, Luiz RicardoThe use of powdered graphite as a solid lubricant to reduce friction among soybean seeds during mechanical sowing aims to facilitate the seed flow into the seed reservoir, while reducing mechanical damage to the seed. The objective of this study was to evaluate the influence of graphite on the longitudinal deposition of soybean seeds using mechanical and pneumatic feeders at different distribution velocities. T...
Estimation of second season maize yield loss by the spatial variability of the ...
Sobenko, Luiz Ricardo; Armindo, Robson André; Wolff, Wagner; Costa, Jéfferson de Oliveira; de Miranda, Jarbas Honório; Duarte, Sérgio NascimentoIrrigation systems are still traditionally dimensioned and managed considering that the cultivated area is homogeneous, thereby not taking into account the spatial variability of soil physical and hydraulic parameters, potentially limiting productivity. The aim of this work was to estimate the yield losses of second season maize crops when comparing the application of constant and variable complementary irrigat...