982-1 Fertilizers.
Fertilizers shall comply with the State fertilizer laws. The numerical designations for fertilizer indicate the minimum percentages (respectively) of total nitrogen, available phosphoric acid, and water -soluble potash, contained in the fertilizer. At least 50% of the nitrogen shall be from a slow -release source.
982-2 Certification.
The Engineer shall collect a copy of the fertilizer label and retain according to the FDOT retention policy . The label shall include guaranteed values for total nitrogen, available phosphoric acid, water -soluble potash, and sulfur.
982-3 Fertilizer Rates.
Soil laboratory fertilization recommendation s are based on the amount (lbs) of nutrients (N, P2O5, K2O) to apply per give n area (usually 1 ,000 square feet.). From this recommendation it is necessary to select an appropriate fertilizer grade and then determine how much of this fertilizer to apply to the area. If a complete fertilizer (containing all three primary nutrients) is not available in the ratio of N-P-K necessary to match the ratio required in the fertilizer recommendation, mixed -grade or single-nutrient fertilizers should be used to satisfy each nutrient requirement. To calculate fertilizer rates:
1.Measure the area to be fertilized in square feet.
2.Select fertilizer s to be used based on the soil testing laboratory recommendations by matching the ratio of nutrients recommended to the fertilizer grades available.
3.Determine the amount of fertilizer to appl y to a given area (1,000 square feet.) by dividing the recommended amount of nutrient by the percentage of the nutrient (on a decimal basis) in the fertilizer. Apply no more than 0.25 lbs P2O5/1000 square feet per application prior to planting.
4.Adjust the amount of fertilizer to the project area. FY 2023-24 Return to Table of Contents SECTION 983 WATER FOR GRASSING The water used in the grassing operations may be obtained from any approved source. The water shall be free of any substance which might be harmful to plant growth. Effluent water shall meet all Federal, State and local requirements. FY 2023-24 Return to Table of Contents
Source: Florida Standard Specifications for Road and Bridge Construction, 2024 Edition. Pages 1166–1166 of 1,299.