Gestion de la variation de la qualité des sols par les agriculteurs : enjeux pour la rentabilité et la durabilité des exploitations agricoles françaises

Abstract : Soil quality is a major issue for the environment and the preservation of the agronomic and economic potential of farms. Farming practices have substantial impacts on soil quality; some are detrimental and lead to a long-term decrease in productivity. The objective of this thesis is to characterize the mid-term and long-term economic issues related to soil quality changes using theoretical, statistical and empirical tools and to propose a dynamic bioeconomic model that highlights these issues. Using the simulations of different economic scenarios, we seek to identify the levers that make it possible to preserve the agronomic and economic potential of soil. The model used is a dynamic optimal control model where the rational agent-farmer with perfect information maximizes his profits over time under a soil quality dynamics constraint. We consider two production factors: productive inputs (such as mineral nitrogen fertilizers) and soil quality, captured by the quantity of soil organic mSoil quality is negatively impacted by the productive inputs used by the farmer, who can invest in his soil quality (crop residue use, tillage intensity, crop rotation choice). Our results show that soil quality investment is a component of the farmer's optimal strategy. The farmer substitutes the ecosystemic functionalities of his soil for chemical inputs in response to the increase in fertilizers and energy prices. However, the mitigated results of our empirical model in terms of SOM final values show the importance of considering a large range of farming practices. Our results offer a ba
Document type :
Theses
Complete list of metadatas

Cited literature [97 references]  Display  Hide  Download

https://tel.archives-ouvertes.fr/tel-01976630
Contributor : Abes Star <>
Submitted on : Thursday, January 10, 2019 - 11:06:06 AM
Last modification on : Friday, January 11, 2019 - 1:18:29 AM

File

pdf2star-1547107113-These_Issa...
Version validated by the jury (STAR)

Identifiers

  • HAL Id : tel-01976630, version 1

Collections

Citation

Alice Issanchou. Gestion de la variation de la qualité des sols par les agriculteurs : enjeux pour la rentabilité et la durabilité des exploitations agricoles françaises. Economies et finances. Agrocampus Ouest, 2017. Français. ⟨NNT : 2017NSARE047⟩. ⟨tel-01976630⟩

Share

Metrics

Record views

180

Files downloads

65