I Heard You Like Math
The Dirty Column
Nitrogen Rich
Dig Deep!
I've Had ENOUGH Math...
100
Calculate the PERCENT SLOPE of a portion of a field that is 150ft long with an elevation change of 8 feet.
5.33 %
100
Why was Piglet staring into the toilet?
He was looking for Pooh
100
What is the organic nitrogen content of biosolids having 5.1% kjeldahl nitrogen and 1.8% ammonia nitrogen?
3.3%
100
Where do you find the official soil information?
Web Soil Survey
100
Based on a slope of 5.33%, if the soils are suitable, would you be able to surface apply on this field?
Yes
200
Why do plants hate math?
because it gives them square roots
200
What nutrient are we most concerned with leaching to the ground water?
Nitrate
200
Aerobically digested biosolids will be surface-applied to hay. The biosolids have 4.9% kjeldahl N and 1.2% ammonia N, how much available nitrogen does one dry ton of these biosolids have?
34.2 lbs N/dry ton
200
When you see dull or grayish colors or mottles mixed with tan, brown, or red colors, what does that indicate?
Saturated soil conditions/seasonal high water table/redoximorphic features
200
True or False, if you exceed any cumulative pollutant loading rate for any metal, you can no longer apply biosolids to the site.
True
300
A steady-state, mixed digester has a volume of 100,000 gallons. On a daily basis, 5000 gallons of biosolids are removed from the digester. What is the solids retention time (SRT) of the biosolids?
20 Days
300
What nutrient are we most concerned with running to surface water?
Phosphorous
300
An application of 160 pounds of available N per acre is desired. The biosolids to be applied has an available N content of 40 pounds per dry tons. How many dry tons of biosolids are necessary to supply 160 pounds of available N?
4 dry tons/acre
300
Why were the baby strawberries crying?
Ma and Pa were in a jam...
300
Describe this parcel in the section below and determine how many acres are in the shaded area:
N ½, NW ¼, NE ¼
20 Acres
400
What is the estimated site life for nickel if 210.7 lbs have been previously applied with an assumed annual application rate of 4.4 dry tons/year with a nickel concentration of 110 mg/kg?
170 yrs.
400
What is the soil limit for:
Phos
Potassium
Salts
pH
Phos: 200ppm
Potassium: None
Salts: 4 mmhos/cm
pH: 5.5
400
What is the MANA rate for clover/grass hay in mid August (after the 2nd cutting)? The yield goal is unknown.
50 lbs N/ac
400
An operator applied 3.2 dry tons per acre of biosolids. Complete the following table showing the amount of pollutants applied per acre:
400
What is the Minnesota State Soil?
Lester
BONUS: What is Wisconsin's state soil?
DOUBLE BONUS!!: What years did these become state soils?
500
The inputs to and the outputs from a two-stage, anaerobic digester system are measured on a daily basis and averaged over a two-month period. The inputs and outputs are also analyzed once a week for total and volatile solids. The analytical results are averaged over the same two-month period. Using the data shown below, calculate the volatile solids reduction of the digester system.
45.9%
500
What's the difference between the ceiling concentrations and the cumulative metal loading rates?
Ceiling concentration is the maximum amount of metals that can be in biosolids in order to land apply. You test the biosolids to get the value.
Cumulative pollutant loading rates are the maximum amount of metal that can be applied to a field.
500
Lime-stabilized biosolids were surface-applied to a site during crop year 2018 at an application rate of 4.4 dry tons/ac. The biosolids had a kjeldahl N content of 5.1% and a ammonia N content of 1.2%. How much nitrogen from this application is available in crop years 2018, 2019?
2018: 190.1 lbs N/ac
2019: 41.18 lbs N/ac carry over
500
How many acres on the land below can receive surface applied biosolids?
46.8 acres
500
What makes an exceptional quality biosolids?
Class A pathogen reduction