COTTON FERTILIZATION WITH COMPOSTS OF (SUGAR-BEET) VINASSE AND AGRICULTURAL RESIDUES

A concentrated depotassified beet vinasse was mixed with each of ten s olid agricultural residues. The ten mixtures were composted for 7 mont hs. The composts obtained after this period were used to fertilize a c otton crop. A mineral treatment was used for comparison and a treatmen t without fertilization was used as control. The nitrate content of pe tiole determined before the first top dressing revealed significant di fferences between treatments: All treatments produced higher yields th an the control. Analysis of fibre quality did not show significant dif ferences between treatments.