On Tue, 16 Nov 1999, Gert Doering wrote: Thank you very much gert it now cleared my doubt. *~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~* Dr. S. K. Singh, Agril. Res. Services. Scientist (AG&B) and I/C ARIS Cell, CIRG, Makhdoom, Farah, Mathura 281122, India. Ph. 91-565-7-63334(R) 63246 (Fax), 63325 (O) *_*_*_*_*_*_*_*_*_*_*_*_*_*_*_*_*_*_*_*_*_*_*