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Adjusting Turf Culture to the Region
Soil Acidity and Liming to Correct It
Practical Use of Fertilizers on Turf
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1,000 square feet acid soils adequate aeration Aerifying alkaline ammonia amounts applied bentgrass bermudagrass calcium chemical Chlordane clay color cool-season grasses cooler regions correct Courtesy crabgrass creeping stems damage decay depth desired disease drainage fertilizer germination grass roots ground limestone growing season grubs Heptachlor herbicides humid regions humus important inches insecticides insects Kentucky bluegrass lawn lime limestone machine microbes mixture moist moisture needed nitrogen nutrient elements occur organic matter particles peat perennial pests phosphate plant roots potash potassium pounds produce rainfall red fescue root system ryegrass sandy soils seed seedbed seedlings shade shoot and leaf silt soil acidity soil conditions soil humus soil improvement soil structure soil surface soil test soluble species spread spring sprinkler stolons strongly acid subsoil supply texture tolerant topdressing topsoil treatment turf areas turf grasses turf manager U. S. Dept ureaform warm-season grasses warmer regions weather zoysia