Table 2: All measured landscape, field and farmer variables presented with mean, max and min values.

In field variables (number of zeros); max; min

Crop density in June (% cover)52; 89; 29
Crop height in July (cm)105; 121; 83
Yield (kg)5130; 7700; 1800
Nitrogen application (kg/ha)103 (3); 168; 0
Farm manure/Green manure/chemical fertilizer (number of farms)0/2/14
Number of herbicide applications1 (4); 1; 0

Field variables

Area (ha)12.3; 60; 1.5
Perimeter (m)1536; 3230; 593
Field islands (perimeter)72 (7); 593; 0
Total number of trees, stones and shrubs in the field border 12; 32; 1

Landscape variables

Proportion in % of (within 300 m)
Forest14 (4); 40; 0
Fields62; 85; 14
Pasture3 (12); 18; 0
Perennial crops (ley and fallow)19 (3); 38; 0
Spring sown crops 38; 66; 18
Autumn sown crops37; 70; 16
Length of roads (m)836 (3); 1583; 0
Number of houses1.9 (3); 5; 0

Farmer variables

Interest in nature2.1; 2.9; 1
Work (full or part-time)8 full time and 8 part-time

mean value was calculated using only non-zero values.