1) The document describes several modules within a farm management application, including modules for managing certificates of title, sowing plans and subventions, production contracts, purchase and quality control of goods, silo management, and warehouse materials. 2) The contracts module manages production contracts with subcontractors for various crops and tracks inputs like seeds and fertilizers that are deducted from purchase prices. 3) The purchase module determines quality of purchased goods, tracks quantities received at two locations, and graphs quality parameters against contract standards.