During the 1980-1981 and 1981-1982 was carried an experiment at the Tobacco Experimental Station of San Juan y Martinez, Pinar del Rio province, in the dark tobacco Criollo variety, grown under irrigation conditions, using for irrigation water from wells with 403 mg / litre for total soluble salts and 21 mg / l for chloride. The experiment was to compare the formulas of fertilizers 10-8-17-3, 10-4-15-2 and the unfertilised control and study the influence of treatments on the combustibility of the tobacco leaves.

 

It were determined the contents of chlorine and potassium and its relation to the combustion time by foliar levels. There were not significant differences in the combustion time and the potassium/chlorine ratio between the two formulations of fertilizer. It is found that when the potassium/chlorine ratio is greater than 5, has a positive effect on combustibility. We found that you can use either fertilizer formulas studied, without affecting significantly the quality of the combustion of tobacco leaves.