Weekly Grassland Management Diary of Robotic Grazing Farm – 28th June (week 27)

Current Covers In C Paddocks

Current Covers In C Paddocks


  • Growth 70.8kg DM/ha (35.5)             
  • AFC 592kg DM/ha (568)
  • Cover/cow 180kg DM (166)
  • Demand/ha 49.5 kg DM/ha (58.2)


  • MS/cow 2.09kg (2.02)
  • Fat 3.97% (3.84)
  • Protein 3.53% (3.48)

*previous weeks Grassland Management figures in brackets

Last week, cows grazed out A4, A5, C10 (C11 grazed by bullocks), C1 and B6. They are going through the A paddocks quickly as they are lower covers. Cows are doing a good job of grazing out paddocks even with the stemmy grass. The farm got 8mm of rain all week. The Nitrogen spread 2 weeks ago must have been taken up by the grass; growth rates are up at 70kg DM/ha and milk solids have increased by 0.7kg. The milk protein has increased mainly due to the N taken up by the grass, even though it is stemmy.


The A paddocks had growths of 64kg DM/ha; this will be low this week with the forecasted weather (A paddocks are sloped and burn up faster than B&C). Because of this, the times going into A will be reduced (5pm-10pm) and getting a bale of silage. We aim for the cows to take in 2kg DM of silage and 2kg DM of grass in A; the other 13kg DM of grass will come from B and C. The covers in B (AFC 690) and C (AFC 656) are above the target PGY but this will balance out the low AFC of 400kg DM/ha in A. We need to increase A covers by slowing down the rotation with bales.


High temperatures are forecast for the week (>20°C) with no rain in Leinster. This will reduce growth rates especially if there is no cloud. Hopefully the grass is still taking up the N to keep protein up. Growth rates will drop to around the 30-40’s kg DM/ha. The rotation length will stay at 26 days. The cover/cow has increased and the aim is to increase it further. An extra 2.8ha will be available for grazing in the next 10-14 days. We expect the milk solids to drop as we are introducing baled silage and all grass is heading out; the N spread may keep milk protein up slightly higher. Clover accounts for 60-80% of the covers in the B paddocks. Stemmy grass has an UFL value as low as 0.85 with clover staying at 1UFL; clover also has a CP content of 22% and a high digestibility of 80%. This should help keep milk solids from dropping too much.

Agrinet Datawedge



Jordan Molloy – Grazing Consultant, Grasstec

“I teach farmers how to measure grass and the discipline needed to do weekly farm walks. I show them how to input their data onto Agrinet and how to understand the grass wedge. Each week presents a different scenario on the farm so it’s crucial that the farmer can interpret the data in order to make informed decisions. Grasstec consultants are available in Ireland and the UK.”

Contact Jordan

T: +353 (0)87 7925511         E: jmolloy@grasstecgroup.com        W: www.grasstecgroup.com