Each of the experimental variables was taken at
three different levels so, the sum of the experimental units
would get 34= 81 treatments. The first 27 treatments were
achieved at the winter season form 22 Dec., 1996 to 26 Feb.,
1997; the second 27 treatments were performed at the spring
season form 1 Mar., to 10 Apr., 1997; and the last 27
treatments were undertaken at the summer season from 1
July to 26 Aug., 1997, to cover the sun period range all over
the yea