where ADd is the accumulated degree-days, i is the day of year, Tmax is the daily maximum temperature, Tmin is the daily minimum temperature, and Tb is the base temperature.
The base temperature is a function of the plant species and varies between 0 and 10°C (Vander Weide, 1992; Satorre, 1996). The Tb used in this method was 5°C. Temperature data were used from the weather station of Setif, 2 km east of the field experiment. During the 5 years of observations the first rains were noted at the end of November. December 1 was taken as initial date to count number of days and the number of degree-days. The obtained data were subjected to an analysis of variance.
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Do we really want the one thing that gives us its resources unconditionally to suffer even more than it is suffering now? Nature, is a part of our being from the earliest human days. We respect Nature and it gives us its bounty, but in the recent past greedy money hungry corporations have made us all so destructive, so wasteful.