A tool for economical and technical modelling and simulation of a farm or a group of farms

1. Olympe A tool for economical and technical modelling and simulation of a farm or a group of farms O. Deheuvels – Cirad - Cropping systems research unit (olivier.deheuvels@cirad.fr)

2. Cropping systems • Livestock raising systems • Post harvesting systems • Fallow lands and shifting systems • Tools and buildings Olympe and the farm system concept Analysing the farm: • Total farm area.

3. Simple and complex cropping system analysis : • Cultivated area for each crop • Varieties • Age of plantation • Density • Annual yield • Calendar of works realized in the plot and their respective times and costs • Associated crops : varieties, yield... Olympe to compare incomes and benefitsat the cropping system level

4. Parameters definitions (Database) Definitions of the items

5. Croping systems • Livestock systems • Farm activities • Land reserves (Fallow lands, forests ...) • Tools, fixed assets and treasury The farm and the farming system The “arming system: • Labour force andworking calendar

6. Cropping systems annual crops, animals, tree crops or perennial The production workshops

7. Farming systems The farming system

8. The agricultural region Farming Systems / Land System B A A A

9. Regional analysis : groups of farms, typology The regional approach: Sets of farmers

10. Hazards on Prices and quantities variations The uncontrolled external effects

11. Calculation options Transfer to other software Comparative studies Customisation of outputs and results

12. Hazards (Quantity/ Price) Simulator + Calculation procedures Simulator Procedures Edition Comparison RESULTS Olympe : overview of the concept • Data Base • - Names and UnitPrices • of Variables • sorted by • categories of • Outputs and • Inputs • Calendar • of working • periods • Data Base • per crop or animal • quantities/ha • Labour + Basic information - Units -Taxes +

13. Step 1: Input of data

14. Step 1: Input of data • STEP 2 • Definitions for • Names • Unit Prices • of • VARIABLES • by categories of products and inputs. • Available working Periods Definitions of variables (Base d’informations) • STEP 3 Definitions : • of cycles, • of q/ha • of labour needed Systèmes de culture et d’élevage Hazards Quantity/Prices Toutes les unités et taxes STEP 1 Definition of UNITS and TAXES Region Farm Typologies Sort farms Build custom indicators and tables

15. Step 1: Input of data • Back to farms : • - Missing data, errors, • Survey: review the forgotten aspects • Corrections in Olympe • Training to methodologies and survey techniques • (Re-) formulation of researh questions

16. Step 2: Analysis of data

17. Step 2: Analysis of data • STEP 2 • Definitions for • Names • Unit Prices • of • VARIABLES • by categories of products and inputs. • Available working Periods Definitions of variables (Base d’informations) • STEP 3 Definitions : • of cycles, • of q/ha • of labour needed Systèmes de culture et d’élevage STEP 5 Hazards prices / rendements STEP 1 Definition of UNITS and TAXES Toutes les unités et taxes STEP 6 Group farms Σ/Averages Comparisons Région Exploitation agricole STEP 4 Farm’s surfaces STEP 5 Typologies Classer des exploitations Construire indicateurs et tableaux STEP 5 Sorting and analyses

18. Étape 3 : Returning and validating the results with the farmers • - Verification survey of results • Discussion of actual or potential results - Validation of information received from the farmers, - Building scenarios and tendancies ... • Simulations on Olympe • Interest of individuals or groups • Request for further trainings • Re-formulation of research questions