EDITORIAL

The journal Agronomía Colombiana is pleased to present the third issue of 2015, which marks the decision to use the article layout of the previous version in order to promote online publication and reader viewership.

This issue contains the following topics:

The plant breeding, genetic resources and molecular biology section presents the results of a study conducted in the Valle de San Juan on the gene flow of transgenic and non-transgenic maize species.

The results of a study on the effect of the maturation state of fruits and the fermentation period of seeds on the germination of passion fruits (Passiflora edulis Sims f. flavicarpa) and sweet granadilla (Passiflora ligularis Juss.) is published in the propagation and tissue culture section.

The articles in the Crop physiology section deal with topics such as the evaluation of different potato genotypes in the accumulation of arsenic in contaminated soils of Bangladesh and the distribution and assignment of assimilates in criolla potato genotypes in fields in Antioquia (Colombia), while the effect of deficit irrigation in the rapid growth stage on the vegetative growth of pear trees clearly outlines the problems that Colombian agriculture is facing due to the El Niño Phenomenon.

The crop protection section includes an article on the Micropezidae family collection in the Museo Entomologico UNAB de Colombia and an article that relates the nutritional state of banana leaves with the severity of black sigatoka in the Magdalena region (Colombia).

The postharvest physiology and technology section has one study that looked at the changes in cape gooseberry fruits that were refrigerated with the calyx and treated with 1-methylcyclopropene.

Meanwhile, the soils, fertilization and management of water section contains the results of two studies. The first one determined the relationship between the contents of organic material and clay and the friability index of soils cultivated with sugar cane in the Valle del Cauca (Colombia). The second study marked out the management areas of maize crops according to yield and different physical soil parameters in the eastern plains of Colombia.

Within the economy and rural development section, a study observed the rural communities of the Colombian Caribbean with the introduction of fortified food products, as compared to traditional products.

In this issue, a section on Agroecology was added, which contains an article on the technological and scientific challenges seen in agroecology in Latin America for the 21^st century.

With this collection of articles, the journal Agronomía Colombiana continues its goal of publishing articles that deal with current problems and, to this end, inviting researchers and authors to submit manuscripts that are related to climate change and post-conflict problems.