Goianésia, Brazil
Goianésia, Brazil
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Santos G.G.,Federal University of Goais | Griebeler N.P.,EA UFG | de Oliveira L.F.C.,Federal University of Lavras
Revista Brasileira de Engenharia Agricola e Ambiental | Year: 2010

The most important rainfall characteristics on erosion process are the relationship between intensity, duration and frequency of precipitation and its erosivity. As the soil is a slow renewal resource and can be quickly degraded by erosion, the knowledge about how the precipitation acts in the environment is fundamental. In this way, the development of techniques, technologies and the establishment of actions to diagnose, to evaluate and to present solutions to erosion problems is important both economically and environmentally. Many studies, including research results and development of models have correlated precipitations characteristics in order to understand, to predict and to present solutions for the erosion problem. In this sense, some of these studies were compiled with the purpose of presenting the "state of the art" with respect to precipitations, soil management and water erosion.

Campos P.F.,EA UFG | Junior J.A.,Federal University of Goais | Casaroli D.,Federal University of Goais | Fontoura P.R.,EA UFG | Evangelista A.W.P.,Federal University of Goais
Engenharia Agricola | Year: 2014

The state of Goias is the second largest producer of sugar cane in Brazil. However, it still has low productivity, mainly due to the lack of varieties adapted to the region and the typical water deficit. The experiment aimed to evaluate the performance of sixteen sugarcane varieties submitted to supplementary irrigation in the "Cerrado" (Brazilian Savanna).The experiment was carried out in Goianesia-GO (Brazil), in a Red yellow dystrophic latosol (Oxisol), from April 2011 to May 2012. Randomized blocks design was used, with bifatorials treatments, in sixteen sugar cane varieties: CTC2, CTC4, CTC9, CTC11, CTC15, CTC18, IAC87-3396, IAC91-1099, IACSP94-3046, IACSP94-2094, IACSP94-2101, IACSP95-5000, RB857515, RB92579, RB966928 and SP86-0042; and five evaluation time: 113, 145, 174, 203 and 285 days after plantation (DAP). The supplementary irrigation was of 50% water requirement using a sprinkler system. Varieties performance was evaluated through: tillering, growth, productivity and performance of industrial plants. The results showed significant differences between the varieties. The best results were obtained for varieties CTC9, CTC11, IAC87-3396, IAC91-1099 and SP86-0042, to productivity and industrial performance, which can be recommended in savannah cultivation with supplementary irrigation (50%).

Ganga R.M.D.,Federal University of Goais | Ferreira A.F.,Federal University of Goais | Lazaro J.C.,EA UFG | Ronaldo V.N.,EA UFG | do Nascimento J.L.D.,EA UFG
Revista Brasileira de Fruticultura | Year: 2010

The research intends to characterize trees and fruits from natural populations of Hancornia speciosa Gomes, as well as evaluate the distribution of phenotypic variability among them. Populations of mangaba trees were sampled in the Cerrado, including the states of Goiás, Tocantins, Mato Grosso, Mato Grosso do Sul, and Bahia, covering 109 mother plants from 35 populations of the botanical varieties pubescens, gardneri, speciosa and cuyabensis. The results showed that the H. speciosa plants have high levels of phenotypic variation in terms of fruit characterization and, on the whole, most of this variation occurs among populations. There is also a large phenotypic variability within the botanical varieties. Hancornia speciosa var. gardneri and H. speciosa var. pubescens fruits are larger and heavier. The botanic variety gardneri shows gait higher than the others varieties. In the varieties gardneri and pubescens predominate round shape and light green color, while in speciosa and cuyabensis predominate oblong shape and dark yellow and dark green colors, respectively. The varieties gardneri and pubescens stand out as the most potential for selection based on the characters of the fruit size and fruit mass.

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