Farm size as defined by census returns 1950-1970
1 = Less than 50 acres
2 = 50 to 99 acres
3 = 100 to 149 acres
4 = 150 to 299 acres
5 = 300 to 499 acres
6 = 500 to 699 acres
7 = 700 to 999 acres
8 = 1000 acres and over

Tenure type
1 = Onwer Occupier
2 = Wholly Rented
3 = Mixed Tenure

Change of name on Fieldbook
1 = Original name
2 = Name changed
3 = Third name change

Farm type (front of fieldbook)
6.45 = Dairy with rearing stores and fattening pigs
6.8 = Dairy with/and Pigs with some/ and arable

Type of district belonged to
1 = East Devon and West Dorset Dairy
2 = South Chalk (Upland)
3 = North East Devon Sheep
4 = South West Mixed
5 = North Dorset
6 = North Devon & Northeast Cornwall
7 = North Devon rearing
8 = South West Moorland

Farms that sell cattle
0 = Not Selected
1 = Selected

Farm have installed mains electricity
0 = No
1 = Yes

Farm Area compared to sample mean
1 = Larger than sample mean
2 = Smaller than sample mean

Farm Area compared to sample median
1 = Larger than sample median
2 = Smaller than sample median

Absolute change in farm area over period of time in survey
1 = Increaed in size over survey period
2 = Decreased in size over survey period
3 = Remaind same size over survey period

Change in farm area over period in farm survey compared to mean
1 = Farm area larger than sample mean and increasing in size over time relative to survey mean
2 = Farm area larger than sample mean but decreasing in size over time relative to survey mean
3 = No change in farm area and decreasing in size (relative to mean) over time in survey
4 = Farm area less than sample mean and decreasing in size over time relative to survey mean

Change in farm area over period in farm survey compared to median
1 = Farm area larger than sample median and increasing in size over time relative to survey median
2 = Farm area larger than sample mean but decreasing in size over time relative to survey mean
3 = No change in farm area and increasing in size (relative to median) over time in survey
4 = No change in farm area but decreasing in size (relative to median) over time in survey
5 = Farm area less than sample median and decreasing in size over time relative to survey median

Category of relative change within farm from first to last entry
1 = Farm has at least doubled in size over period in survey
2 = Farm has increased in size (up to double) over period in survey
3 = Farm has decreased in size (up to halved) in size over period in survey
4 = Farm has a least halved in size over period in survey
5 = Farm has more less remained the same size over period in survey

Purchase of Forage Harvester
1 = Yes
2 = No

investment in Milking Parlour
1 = Yes
2 = no

purchase of hay making equipment
1 = yes
2 = no