English to Spanish Science Agriculture

He hallado que "origination" puede significar: origen, creación, iniciación, pero aunado con "grain" no se me ocurre cómo traducirlo.

Ejemplos de uso:
1. AGP Grain is committed to serving local cooperatives and agricultural producers by providing competitive access to regional and international grain markets through our primary business functions: ***grain origination***, grain marketing and transportation services.
2. In this capacity, Coyle oversees the company's ***grain origination*** and marketing, and the operations of its two export facilities located in Illinois and Wisconsin, one of which is the largest delivery warehouse for Chicago Board of Trade futures.
3. By coordinating our efforts with Southern States, we can provide Mid-Atlantic farmers with even more marketing options – both domestic and international – while maintaining the local ***grain origination*** that is so very important to the region’s poultry industry.

Muchas gracias por la ayuda.