If the entire field is silted, rework and reseed the field. Where alfalfa stand is over two years old, overseed with temporary crop and reseed alfalfa at least one month after having reworked the field. You can reseed small areas with fast-growing grasses. This will help provide forage until the entire field can be reworked. In old fields, seeding to annual crops such as ryegrass will provide some hay and also will help control weeds.
Recovery usually depends on the type of legume.
Alfalfa probably will recover from moderate silting better than white clover varieties. White clover will not survive silting that covers the ends of the growing stems or stolons. Ladino clover, however, will fill in stands from a few surviving plants if the area is not too large. Grasses such as ryegrass, orchardgrass, fescue and meadow foxtail will probably grow through a moderate silt deposit, and can stand several days of flooding without injury. Tall fescue will tolerate more water than ryegrass or orchardgrass.