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Grassland practical example: Yield impact of weeds

Grassland practical example: Yield impact of weeds

Grassland practical
example:
Yield impact of weeds

04.04.2022

The following practical example is used to calculate how weeds affect grassland quality. But with the right machines, costs are reduced but yield and forage quality are increased.

Grassland target yield

 

Target yield:

10000 kg DM/ha

Energy density:

6.0 MJ NEL/kg DM 

Protein content:

160 g/kg DM

Grassland target yield

 

Target yield:

10000 kg DM/ha

Energy density:

6.0 MJ NEL/kg DM 

Protein content:

160 g/kg DM

Actual situation

15 % gaps, docks (1 plant/m²) or other useless species of plant

Without calculating any additional damage, there is a "deficit" of:

» 9000 MJ NEL per ha 

» 240 kg protein per ha

Actual situation

15 % gaps, docks (1 plant/m²) or other useless species of plant

Without calculating any additional damage, there is a "deficit" of:

» 9000 MJ NEL per ha 

» 240 kg protein per ha

Loss of protein – replaced with soya

 

240 kg : 40 x 100

= 600 kg soya (per ha GL)
600 kg soya x 0.65 € = € 390.00 (per ha GL)
Loss of protein – replaced with soya

 

240 kg : 40 x 100

= 600 kg soya (per ha GL)
600 kg soya x 0.65 € = € 390.00 (per ha GL)
Energy loss - replaced with wheat 

 

9000 MJ/ha - 4400 MJ/ha (from soya)

= 4600 MJ/ha

4600 MJ : 7 MJ/1 kg wheat

= approx. 600 kg wheat 
650 kg wheat x € 0.36 = = € 234.00 (per ha GL)
Energy loss - replaced with wheat 

 

9000 MJ/ha - 4400 MJ/ha (from soya)

= 4600 MJ/ha

4600 MJ : 7 MJ/1 kg wheat

= approx. 600 kg wheat 
650 kg wheat x € 0.36 = = € 234.00 (per ha GL)

Total energy and protein loss

with 1 dock/m² (or 15% gaps) 

600 kg soya x € 0.65
650 kg wheat x € 0.36

per ha of grassland

= € 390.00 

= € 234.00 

= € 624.00 

with 0.5 docks/m² (damage threshold)= € 312.00 loss per ha of grassland


 

On average, meadows have at least 30% gaps or other lower-quality grasses:
Approx. € 1 250.00 loss per ha of grassland

Meadow maintenance with the
Einböck PNEUMATICSTAR
 
Working speed 8-10 km/h= up to 6 ha/h
Minus turning, filling and
start-up time
= 4 ha/h
PNEUMATICSTAR grassland seeder= € 15.00/ha
Tractor and driver= € 15.00/ha
Seeds 8 kg - 10 kg per year= € 50.00/ha
Maintenance costs per year= € 80.00/ha

This calculation is a practical example and requires explicit adjustment or individual calculation to the respective farm. Einböck assumes no responsibility for the correctness and completeness of the respective calculation. Market prices spring 2022

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