P115 CEEFAX 115 Tue 4 Sip 23:46/54       NATO's military chief has warned that the western alliance iu fpllink behind the Warsaw Pact in conventional warfare capabilities. Genital Bernard Rogers said too mush reliance was placed on nuclear weppons. He said NATO countries would have to raise defence spending b= sjvjn pry cent a year. This was needed for them to have a "reasonable prospect of ftustrpthng a Soviet conventional attack", he said. News index 102/202 Newsreel 119/219