Testing (1) Development (1) Employment (1) Assaying (1) Interviews (1) Social surveys (1) Production (Economic theory) (1) Licenses (1) Interviewing in journalism (1) Hydrogen-ion concentration (1) Grain (1) Farmers (1) Economic surveys (1) Interviews (1) Yields (1) Analysis (1) Soils (1) Occupations (1) Equipment and supplies (1) Supplies and stores (1) Encuestas económicas (1) Concentración de iones hidrógeno (1) Autorizaciones (1) Agricultores (1) Entrevistas (1) Producción (1) Suelos (1) Trabajo (1) Encuestas sociales (1) Économie rurale (1)