Fig. 2 Relationship between fertilizer N rate of the previous onion crop and sugarbeet petiole nitrate N concentration 30 June 1991 and 18 June 1992. Error bars show standard error of the mean
Fig. 2 Relationship between fertilizer N rate of the previous onion crop and sugarbeet petiole nitrate N concentration 30 June 1991 and 18 June 1992. Error bars show standard error of the mean