Mix equal parts of top soil and aged compost in a wheelbarrow. Add the mixture with a shovel to the low spots in a Bermuda lawn to bring the soil level even with the surrounding ground level.
Cover the low spots with 1 to 1 1/2 pounds of hulled Bermuda grass seed or 5 to 10 pounds of unhulled Bermuda grass seed for each 1,000 square feet. Place half of the seeds in a north to south direction and the other half in an east to west direction for even seed spacing. Spread seeds by hand for small areas, or use a spreader for larger areas.
Drag the back of a garden rake lightly over the seeds to cover them slightly and make good seed to soil contact. Spread a 1-inch layer of straw over the seedbeds. Straw acts as mulch and retains moisture, keeps seeds from washing away, and prevents birds from eating grass seed.
Water the grass seed two to four times a day in short 10-minute sessions to keep seeds moist until germination. Apply about 1 inch of water per week after the seeds sprout.
Mow the newly seeded areas when the grass is one-third taller than the mowing height of the established lawn.