Yield Estimates

Harvest potatoes from several 10-ft sections of row, calculate the average wt. in lbs., then multiply by the following numbers to estimate approximate yield/acre in cwt.

Approximate Cwt/Acre = lbs/10 ft. x Multiplication Factor

Row Width (in)

Multiplication Factor

33

16.4

34

15.4

36

14.5

Seed Requirements

Approximate Cwt. of Seed Required to Plant an Acre Using 34-inch Rows
For 36-inch rows, multiply by 0.93

Seed

Seed piece Weight (oz)

Spacing (in)

1

1.5

1.75

2

6

19.2

28.8

33.6

38.4

8

14.4

21.6

25.2

28.8

10

11.4

17.4

20.4

22.8

12

9.6

14.4

16.8

19.2

15

7.8

11.4

13.8

15.6

Potato Weights & Volumes

1 lb./acre = 1.12 kilogram/hectare

1 kilogram/hectare = 0.892 lb./acre

1 cwt/acre = 0.112 metric tons/hectare

1 metric ton/hectare = 8.93 cwt/acre

1 bushel of potatoes = 53 lbs.

1 bushel = 1.244 cu ft = 35.2 liter

1 cu ft of potatoes = about 42 lbs.

1 cwt. of potatoes = 2.38 cu ft

42 lbs./cu ft = 672.5 kg/cubic meter

1 barrel = 11 pas = 165 lb. = 3.93 cu ft = 0.11 cu meter

1 short ton = 2000 lb.

1 metric ton = 2204.6 lb.

Sprayer Calibration

Broadcast Sprayer Calibration:
Gallons/acre = (5940 x gallons/minute/nozzle)/(nozzle spacing in inches x mph)
Example (5940 x 0.35 gpm)/(18 inches x 4.5 mph) = 25.7 gpa

Band Sprayer Calibration:
Gallons/acre = (5940 x gpm/nozzle)/(nozzle band width x mph)
Example (5940 x 0.35 gpm)/(12-inch band x 4.5 mph) = 38.5 gpa