 Weeds
and weeds control
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The
Ultuna Experiment
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Weedkiller
in Denmark
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Some
previous costumers
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Other
areas of use
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Pictures
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The
Swedish Agricultural University
Uppsala
The Ultuna Experiment UL 1214
The results from studies of the Weedkiller unit show that the efficiency of the spreading was quite extraordinary – between 83 and 95 per cent effective against couch grass. There was little difference between the stubble heights. The results are presented in the table. The wiping was carried out on 5 October, i.e. late in the year. Meteorological data from Ultuna shows that there were hard frosts on the nights before the wiping, but that the following nights were relatively mild. These climatic conditions strengthened the effect of Roundup as shown in the Hallgren & Nilsson Table. Wiping with the Weedkiller unit – stubble lengths of 10 and 30 cm, dosages 0.75 and 1.5 litres/ha. UL-1214. "NB. The test was carried out with a model without blade cutters."
| Test surface | Effect | Couch Grass ref. weight |
Harvest ref. |
| A Untreated, stubble height 10 cm | 0% | 100 | 100 |
| B 0,75 L R. Stubble height 10 cm, wiping while harvesting | 83% | 17 | 100 |
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C
0.75 L R. Stubble height 30 cm, wiping
while harvesting |
95% | 5 | 102 |
| D 1.5 L R. Stubble height 10 cm, wiping while harvesting | 93% | 7 | 108 |
| E 1.5 L R. Stubble height 30 cm, wiping while harvesting | 94% | 6 | 107 |
| F 3,0 L R + wetting. Stubble height 100 cm, wiping | 94% | 6 | 109 |
Also very effective against thistles, which have root systems that can go down to depths of up to 2 metres