ABSTRACT
Code for good agricultural practice. 1999. Jelgava LV, 103 pp. Maidl, F., Sticksel, E., Retzer, F. and Fischbeck, G. 1998. Effect of varied N-fertilisation on
yield formation of winter wheat under particular consideration of main stems and trillers. J. Agron. Crop. Sci. 180, (1): 15-22.
