v.21. .
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| Technical Notes |
| Research notes Management of green sugarcane harvest residues Agroecological zones for sugarcane cultivation in the Cauca River Valley |
| Reports Census of varieties and production of sugarcane and sugar in the Cauca River Valley, 1999 Climatological summary. Automated meteorological network |
| Comments Control of chimney emissions: the case of the Mayagüez sugar mill Environmental management system – ISO 14000 |
| General Information ICA-CENICAÑA Agreement: Continuation of the quarantine station |