Runoff Weed Seed, Sediment, Infiltration and Weed Establishment as Affected by PAM in Furrow-Irrigated Corn
Table 4.   1997 & 1998 Forage Yield (Mg ha-1)
Treatments Adjusted Yield at 70% H2O
PAM Herbicide 1997 1998
Mean SD Mean SD
No PAM Dual 49 5 55 9
Eradicane 50 12 51 4
None 51 10 53 6
Average 50 9 53 6
NRCS STD Dual 56 7 54 10
Eradicane 57 14 57 8
None 52 10 54 7
Average 55 10 55 8
Patch Dual 58 10 56 11
Eradicane 55 8 59 10
None 54 8 48 11
Average 56 9 54 11
Average Dual 55 8 55 10
Eradicane 54 11 56 8
None 53 9 52 8
Table 4.   Forage Yield

Forage yields were similar among years and all treatments.  There were slight yield increases associated with improved weed control and with PAM treatment.  In this study, weed control until canopy coverage was reasonably good in all treatments because of conventional cultivation.  Irrigation was adequate among treatments as well, therefore the increased infiltration was not greatly expressed as yield.  Some loss of nitrogen may have occurred with increased infiltration, partially negating the yield advantage of improved infiltration.

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