EFFECT OF NPK FERTILIZATION AND YEAR ON T HE FLOUR-EXTRACTIONS AND BRAN-EXTRACTIONS OF WHEAT-VARIETIES

In the tests the flour and bran extractions of two wheat varietie were evaluated over two years at different fertilizer levels. Concerning t he two mill-industrial characteristics it can be stated that the effec t of variety and year significantly influenced the parameters tested, while the effect of the different fertilizer treatments was not so mar ked. The year x variety x fertilizer interaction was strong. The year 1991 resulted in a higher flour extraction % in both wheat varieties a t the 16 different fertilizer levels. The flour extraction % in variet y GK Csuros was in every treatment during the two years significantly higher than that of variety GK Kata. The rate of the flour and bran ex tractions in the two wheat varieties was decisively controlled by the genotype. The variety GK Csuros showed at increasing N doses at 0 P an d 0 K levels a growing flour extraction % in both years, while in vari ety GK Kata this was contradictory at similar treatment levels. The in creasing P, K dosings at 0 N level in GK Csuros gave in the most combi nations reliable flour extraction %, while in GK Kata the development of this parameter during the two years partly rose, and partly decreas ed. The combined P, K and N fertilizations strengthened in GK Csuros t he increase of flour extraction, while in GK Kata this effect was not as marked. The year had a strong influence on the improving effect of combined fertilizers on flour extraction %. The rate of bran extractio n showed always an inverse tendency with the flour extraction %.