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United States Department of Agriculture

Agricultural Research Service

Tips for PAM in Furrow Irrigation
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1 - Tips for PAM in Furrow Irrigation
2 - Table 1
3 - Worksheet 1
4 - Worksheet 2
Worksheet 2

POLYACRYLAMIDE WORKSHEET #2


Calculating Granular Rates Based on Pounds Per Acre


STEPS:

1. Determine the area irrigated by one irrigation set. Use feet for distances

2. Acres served multiplied by 454 grams/lb = total grams needed at 1# /acre. Greater or less than 1 pound per acre (454 g) may be required.

3. Estimate the furrow advance time. Divide the total grams needed by hours of advance to obtain the advance phase rate in grams/hr.

Date &
Field
Acres Per
Irrigation Set
(acres) x 454=
Total Needed
For Set
(grams) ÷
Advance
Time
(hours)=
Rate To
Apply PAM
(grams/hour)
Notes:
Example 5 acres x 2270 grams ÷ 6 hours = 378 g/hour erosion controlled

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Last Modified: 8/10/2009
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