Farm: It is organized economic unit in which crop and animal production is carried out with purpose of producing economic net returns.
Farming System: It is a part of farm system which crop production, animal production and combination of both i.e Mixed Farming.
Farm Area: Productive land- cropped area/ fields pastures, plantations, fishponds, forest etc. + indirectly productive land- farm building, ditches, roads etc. + fallow land + unproductive land. Rocks, deserts within farm boundaries.
In the system theory, the terms input and output linked with farming system.
These are Classified as:
1. Economic Input and Output: Are those which usually registered a farm management sheet and comprise all items which are gathering brought or sold which have a value in terms of opportunity cost.
Inputs: Land, labour and means of production.
Outputs: Goods sold and consumed in the farm household.
2. Non-economic Input and Output: Are the free goods from the point of view of farmers.
Inputs: Solar energy, Rainfall etc.
Out Puts: Salts leaving through drainage, O2 etc.