v.27. April-June.
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| Technical and informative notes Genetically modified crops, 2004 |
| Research advances Evaluation of two analytical methods to quantify nitrogen losses by volatilization from soils in the Cauca River Valley |
| Reports Sugarcane and sugar production in the Cauca River Valley, first half of 2005 Climatological bulletin: first half of 2005. Automated Meteorological Network |
| General Information Developments in the sugar chemical sector |