Roots

The most common root crops used in the feeding of farm animals are fodder beet, sugar beet and turnip. The main characteristics of roots are their high moisture content 75-90% and low crude fibre content. The organic matter of roots consists mainly of sugars (50-75%) and is of high digestibility. Roots are generally low in crude protein content and degradability of the protein in the rumen is very high (80-85%). Root crops are generally poor source of vitamins.

Tubers

Tubers are various types of modified plant structures that are enlarged to store nutrients. These includes both  root  and stem tubers. Tubers differ  from  root  crops  in  containing starch.