Table 1. Characteristics of the farms studied in Roslagen, Sweden, and the Mbulu highlands, Tanzania.

Study site  
Average farm size
  
Temperature range
  
Vegetation period
  
Average annual rainfall
  
Pest problems
  
Livestock pathogen problems
  
Level of mechanization
  
Main crops
Roslagen, Sweden  
30 ha
  
-30°C to +30°C
  
4 months
  
550 mm
  
Moderate
  
Moderate
  
High
  
Wheat, oats, barley, potatoes, vegetables
Mbulu highlands, Tanzania  
2 ha
  
0°C to 35°C
  
10–12 months
  
1000 mm
  
Serious
  
Serious
  
Low
  
Maize, beans, wheat, sweet potatoes