EN
Inputs on greenhouse production connected with the use of equipment - counted according to cumulated energy consumption method - were 4.5 - 6.5% of total material costs. In greenhouses older than 20 years, the annual costs of repairing were from 575 to 6105 Polish złoty/1 m² of greenhouse area. Cost of greenhouse modernization ranged from 1488 to 2089 Polish złoty/1 m² total area per year (according to 1992 level of prices).