1. A bermudagrass lawn is to be fertilized with 0.75 pound of nitrogen per 1000
ID: 3197670 • Letter: 1
Question
1. A bermudagrass lawn is to be fertilized with 0.75 pound of nitrogen per 1000 square feet. The fertilizer product available is called Green Max and has a 28-0-0 analysis. The lawn is 4,500 square feet. The applicator has two fertilizer spreaders available, a 4 foot wide drop spreader and a rotary spreader How many pounds of NitroGRN will be needed to fertilize the lawn? The applicator decides to use the drop spreader but must calibrate it first. Assume he is using a calibration pass that is 50 ft long 2. a. How many grams of NitroGRN should be applied per square foot? (1 pound 454 grams) b. How large is the test or calibration area (sq ft)? How many grams of Nitrasa should be collected from the test area to ensure that the spreader is accurately calibrated to the correct setting? c. 3. Your superintendent has asked you to go apply 0.25lb N/1,000ft2 to all greens using a 20-0-10 product and a rotary spreader. The previous assistant had developed a chart that showed which settings resulted in a particular fertilizer rate for each product. You find the appropriate setting for your rate and head to the closest green which is 6,500ft2 in area. After completing two perpendicular passes, you've determined that you used 20 pounds of product. How much N did you actually apply? Explain why the chart's settings resulted in the wrong application rate. 4. You are calibrating a sprayer that travels 3 mph in 2-Low, has multiple nozzles that apply an average of 51 ounces per minute, and has nozzles that are spaced every 20 inches. How many gallons per acre will the sprayer apply? 5. A liquid fertilizer has a 15-5-10 analysis and weighs 11.5 pounds per gallon. How many pounds of nitrogen are in each gallon?Explanation / Answer
TOTAL LAWN AREA= 4500 square feet
0.75 pounds nitrogen per 1000 square feet
means 0.75/ 1000 pounds per sq feet.
now we need for 4500= (0.75*4500)/1000
=0.75*4.5 pounds
= 3.375 pounds of nitrogen.
now if you buy one bag of 28-0-0 fertilizer then, you will get 28% nitrogen of total bag weight. remainning 72% is inert gas filler.
so for to get 3.375 pounds of nitrogen we must buy bag of
x*28/100=3.375
x= 337.5/28
bag weight= 12.0535 pounds bag of (28-0-0)
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