A handbbok on Weed Control in Rice.pdf

Appendices
A. Useful conversions
Weights
1 gram = 0.03527 ounces
1 ounce = 28.4 grams
1 kilogram = 2.2 pounds
1 pound = 454 grams (0.454 kilogram)
1 metric ton = 2,204.6 pounds (1,000 kilograms)
Area
1 acre = 4,840 sq yards = 43,560 sq feet = 0.405 hectare = 4,050 sq meters
1 hectare = 2.41 acres
Volume
1 gallon (Imperial) = 4.546 liters
1 gallon (Imperial) = 1.2 U.S. gallons
1 gallon (U.S.) = 3.785 liters
1 fluid ounce = 28.4 milliliters
1 liter = 0.22 gallons = 1.76 pints
Measurements
1 inch
1 foot
1 yard
1 mile
1 centimeter
1 meter
1 meter
1 kilometer
1 kilopascal (kpa)
2.54 centimeters
0.305 meter
0.914 meter
1.609 kilometers
0.394 inch
3.281 feet
1.094 yards
0.621 mile
0.145 pound per square inch (psi)
Quick conversions
1 liter/hectare = 0.089 gallon/acre
1 kilogram/hectare = 0.892 pound/acre
1 kilogram/liter = 8.33 pounds/gallon
B. Conversion table for liquid formulations
Desired Percent concentration of active ingredient in formulation
active
ingredients 100 90 80 75 70 60 50 40 30 25
(in kg/ha) (liters of formulation needed to spray 1 ha)
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
=
=
=
=
=
=
=
=
=
1.11
1.66
2.22
2.78
3.33
3.89
4.44
5.0
5.55
6.11
6.66
1.25
1.87
2.5
3.13
3.75
4.38
5.0
5.63
6.25
6.88
7.5
1.33
2.0
2.66
3.33
4.0
4.66
5.32
6.0
6.67
7.32
7.98
1.45
2.18
2.9
3.63
4.35
5.08
5.80
6.53
7.14
8.0
8.7
1.66
2.49
3.32
4.15
4.98
5.81
6.64
7.5
8.33
9.13
7.96
2.0
3.0
4.0 a
5.0
6.0
7.0
8.0
9.0
10.0
11.0
12.0
2.5
3.75
5.0
6.25
7.5
8.75
10.0
11.25
12.5
13.75
15.0
3.33
5.0
6.60
8.33
9.99
11.66
13.32
15.0
16.67
18.32
10.0
a For example, to apply 2.0 kg ai/ha using a formulation containing 50% active ingredient, use 4.0 liters of the formulated product.
4.0
6.0
8.0
10.0
12.0
14.0
16.0
18.0
20.0
22.0
24.0
20
5.0
7.5
10.0
12.5
15.0
17.5
20.0
22.5
25.0
27.5
30.0
Appendices 107