I. – As from the first financial year opened after 31 December 1983, for crop production, income in progress consists solely of advances to crops which are entered, at their cost price, in the incoming and outgoing stocks of agricultural holdings subject to the system of taxation based on actual profits.
II. – Advances to crops are represented by all costs and charges incurred during a financial year with a view to obtaining the harvest that will be raised after the end of that financial year. These are exclusively:
1° Costs corresponding to seeds, fertilisers, soil improvers and plant treatment products;
2° Labour costs relating to cultivation, soil improvement and sowing;
3° Material costs relating to the same work: fuel and lubricants, maintenance, repair and depreciation of equipment, work carried out by third parties.