restored to such density and vigor that crab grass 
seedlings will find neither space nor light for develop- 
ment at the critical stage in late May or early June. 
Fall Treatment of the Lawn—lIn late summer, the 
infested areas should be raked before each mowing 
to lift the prostrate stems of the weed and facilitate 
their removal. Attention should then be given to soil 
conditions. Since the desirable grasses prefer mildly 
acid to neutral soils, lime should be applied to correct 
the excessive acidity which is frequently present. Fifty 
pounds of hydrated lime or 75 pounds of finely 
ground limestone, evenly applied to each 1,000 square 
feet of lawn surface, will usually prove adequate for a 
2-year period. In addition, an application of a com- 
plete commercial fertilizer at the rate of 15 to 25 
pounds per 1,000 square feet will greatly stimulate 
turf growth during the fall season when crab grass is 
dormant. A desirable type of fertilizer for both fall 
and spring treatment of lawns analyzes about 5 per 
cent nitrogen, 10 per cent phosphoric acid, and 5 per 
cent potash. Commercial fertilizers analyzing 4-12-4, 
5-8-5, or 6-6-5 should also be satisfactory. 
Thin or bare areas may be raked thoroughly to in- 
corporate the lime and fertilizer with the soil, seeded 
with a suitable mixture of adapted grasses, and thor- 
oughly watered. The type of seeding mixture is most 
essential, since vigorous agressive types of lawn 
grasses are required to offer competition to the crab 
grass. Fall lawns planted with Doughten’s Quality 
Mixtures assure the crab grass competition the fol- 
lowing spring. 
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