**3.4 Improve soil structure**

The improvements are attributed to increases in more stable soil aggregates. The protein, glomalin, symbiotically along the roots of legumes and other plants, serves

**Figure 1.** *Benefits of legume crop in improving soil sustainability [10].*

as a "glue" that binds soil together into stable aggregates. This aggregate stability increases pore space and tilth, reducing both soil erodibility and crusting.
