SQFT: square feet of turf..................

CF/YR: cubic feet per year.................

GTF: Grass Type Factor.....................

G/YR: gallons per year.....................

CFNR/YR: cubic feet of natural rainfall....

GNR: gallons of natural rainfall...........

NR: natural rainfall (Austin = 32).........


STEP 1

50 X SQFT / 12 = CF/YR

STEP 2

CF/YR X	7.48 X	GTF = G/YR

STEP 3

NR X SQFT / 12 = CFNR/YR


STEP 4

CFNR/NR X 7.48 = GNR


STEP 5

G/YR (Step 2) - GNR(Step 4) = WATERING REQUIREMENT