The term 'DEEP FURROW' is a combination of two words, 'DEEP' and 'FURROW'. The word 'DEEP' means having a great depth or intensity, while the word 'FURROW' is a long, narrow TRENCH made in the ground by a plow. Therefore, the term 'DEEP FURROW' can be defined as a long, DEEP TRENCH made in the ground. This term is often used to describe a type of agricultural practice, where a farmer will use a plow to create a DEEP FURROW in the soil in order to plant crops.