The Indian Farmers Fertiliser Cooperative Ltd (Iffco) is planning to invest Rs 400 crore in the Oman-India project, which kicked off last month. Of the total sum, the company has already invested Rs 140 crore on the project. Iffco will invest the rest Rs 260 crore by the middle of next year. The funds will be raised primarily from internal accruals though a part of the total sum would also be raised from borrowings.