Table 1 Key figures for production and udder health in 27 organic and 57 conventional herds (participating in the project on development of health advisory service in Danish organic herds and in the Kongeå-project, respectively), during the period December 1998 to December 1999.
From: Reduced Medication in Organic Farming with Emphasis on Organic Dairy Production
| Â | Organic | Conventional | ||
|---|---|---|---|---|
| Â | 25% | 75% | 25% | 75% |
Number of cows per year | 74 | 130 | 60 | 93 |
Milk yield in 1st lactation cows, EKM per day*) | 19.7 | 23.0 | 21.7 | 24.6 |
Milk yield in ≥ 3rd lactation cows, EKM per day | 22.8 | 28.8 | 25.8 | 29.5 |
Mastitis treatments, % lactating cows per month | 1.8 | 5.1 | 3.3 | 6.7 |
Acute increase in SCSCC, % lactating cows/month | 5.4 | 7.5 | 4.8 | 6.7 |
Chronic elevated SCSCC, % lactating cows | 9.4 | 18.6 | 8.6 | 14.5 |
Bulk milk SCC (calculated from SCSCC) | 260 | 401 | 257 | 330 |