Influence of organic farm yard manure, potassium and boron on quantity and quality of sugar beet in Bardsir region

In order to study the effects of Farm Yard Manure (FYM), Sulfate of Potassium (SOP) and boric acid on quality and quantity of sugar beet, an experiment was conducted in split plot factorial with four replications during 3 years (1999-2001) in Bardsir- Kerman. The FYM was the main plot in 3 levels: 0, 10 and 20 ton.ha-1. SOP was applied at levels, 0, 75 and 150 kg.ha-1 and boric acid at levels 0, 10 and 20 kg.ha-1 which treated in subplot. The results showed that the effect of FYM and SOP on root yield were significant, but boric acid did not have significant effect on increase of moelasses sugar and white sugar content. FYM and SOP application changed sugar beet yield significantly, so that using of 20 t ha-1 FYM and 150 kg.ha-1 potassium sulfate increased white sugar yield 10% and 6% in comparison to the check. Boric acid had no significant effect on white sugar yield. but it increased the white sugar yeild about 1.8% in comparison to the check.