Bangladesh: numbers in use of Ploughs refer to the number of farm family assuming that each farm family has one plough. Source: Agriculture Information Service, Ministry of Agriculture (reference 2007 FAO Resources questionnaire). 

Canada: in Agricultural censuses prior to 1996, the agricultural operations reported the farm vehicles, machinery and equipment located on their operations on Census Day, regardless of ownership. In 1996 and 2001, however, operators reported all farm vehicles, machinery and equipment that thy owned or leased from others. The change affects the comparability of the 1996 and 2001 data with data from previous censuses.

Starting in 1986 data on numbers in use of Agricultural tractors include Garden tractors; from 2001, they also include all-terrain vehicles. Source: StatisticsCanada, Census of Agriculture.

Croatia: data prior to 2003 refer to the public sector only.

Estonia:  numbers in use of Milking machines prior to the year 2001 include Installations.

Hungary: from 1961 to 1990, data on Agricultural tractors and Combine harvester-threshers refer to numbers in use in the cooperative farms only. Starting in 1991, data also cover tractors and harvester-threshers used in corporations and private farms. Source: Food and agricultural statistics 1997, Budapest, 1998.

Iran: numbers in use of Agricultural tractors refer to all type of tractors in the country.

Luxembourg: numbers in use of Agricultural tractors include Pedestrian tractors. 

Norway: numbers in use of Agricultural tractors include Pedestrian tractors.

Kazakhstan: numbers in use of all reported agricultural machines cover only agricultural enterprises. Private farms are not included. Sources: 1994-1997 Statistical yearbook of Kazakhstan, Almaty, 1998. Data on numbers in use of Combine harvester-threshers refer to grain harvesters only.

Occupied PalestinianTerritory: numbers in use of Ploughs refer to Grain drills. Source: Palestinian Central Bureau of Statistics (PCBS).

Pakistan: numbers in use of Combine harvesters-threshers refer to combine harvesters only.

Spain: numbers in use of Agricultural tractors and Combine harvesters-threshers refer to registered numbers of tractors and harvesters without taking into account not working machines. It has been estimated that in 1999 the actual numbers in use of agricultural tractors were around 853510 and the actual numbers in use of cereal harvesters were around 2967.

Thailand: numbers in use of Combine harvesters-threshers refer to threshing equipment. Source: collected by Bureau of Agricultural Economic Research, OAE. 

Uruguay: numbers in use of Agricultural Tractors include Pedestrian tractors. 

USA: numbers in use of Combine harvesters-threshers covered in the 1997 Agricultural census refer to all types of combines. Data collected in the 2002 Agricultural Census refer to self-propelled combines only. Source: Agricultural census 2002.