Coffee producing countries with more than one wet and dry season will have more than one harvesting season. There is a direct relationship between extremes of day and nighttime temperatures and coffee quality.
When guitar tab has a x and then a number at the end of the tab what does it mean? 'x' means the particular string it is next to is not played, 'number' is at which fret to play the string the number is by, counting down from the headstock.
X means any number. E means is an Element of. R means the set of Real numbers. For the domain and range...it depends on which function you use to draw the circle. Only functions have domain and range. If you use a polar function, which uses angle and radius instead of X and Y, you could draw a circle by saying f(t)= r*pi*t, where t is the angle.