1. 50 g of soil is extracted with NH4Cl (ammonium chloride) and the extract diluted to 0.5 liter. The solution contained the following cations:
120 ppm Ca+2 24 ppm Mg+2 1 ppm Na+ 13 ppm K+
a. Estimate the CEC (meq/100g)
b. The soil pH is 7.5. Was your estimate of CEC a good estimate? Why or why not?
2. 100 g soil was completely saturated with Al+3 (100% of the CEC is occupied with Al+3). Any excess Al+3 was leached from the soil sample. The exchangeable Al+3 was then exchanged with K+ by adding 1N KCl. The Al+3 in the extract was determined by titration with 150 ml of 0.15 N base. Calculate the CEC.
3. A soil is 75% saturated with Ca+2 + Mg+2 + K+. 50 g of this soil is titrated with 20 ml of 0.1 N NaOH. Calculate the CEC.
4. The following cations were extracted from 100 g soil with at CEC of 20 meq/100g. The soil contained:
180 mg Ca+2 36 mg Mg+2 1 mg Na+ 13 mg K+
a. Calculate the % base saturation of the soil.
b. Calculate the lbs/acre foot of each cation.
5. The soil test report show the following data (CEC = 15 meq/100g)
Cation lbs/afs
Ca+2 3200
Mg+2 360
Na+ 2
K+ 400
a. Calculate the meq/100 g of each cation and the % base saturation of the soil.
b. Calculate the % acid saturation.
6. A soil is 65% saturated with Ca (CEC = 10 me/100g).
a. Calculate the lb/acre‑foot of Ca.
b. Calculate lbs Ca in 1000ft2 (9 inches deep) golf green (1.1 g/cm3 bulk density).
c. Calculate the grams of Ca in a 2 kg container pot.
7. A grower wants to grow clover in two separate fields. Calculate lime requirement (lbs/afs) to increase pH to 6.8 in BOTH fields. Use diagram below.
8. We want to raise the soil pH from 5.5 to 6.5. The CEC is 28 meq/100g. Calculate the lime requirement in lbs/afs, lbs/1000ft2, and lbs/1000 lbs of potting soil mix (ECC = 80%).
9. A fairway soil has pH 4.5 and CEC = 12 meq/100g. A golf course superintendent received a lime recommendation of 100 lbs/1000 ft2. Using the diagram below, estimate the final pH
10. A laboratory analysis showed the following results:
CEC = 20 meq/100g soil solution Ca = 6 meq/1
CaCO3 = 0.2% soil solution Mg = 2 meq/1
pH = 8.6 soil solution Na = 36 meq/1
EC = 5.0 mmhos/cm
a. Calculate SAR, ESR, and ESP
b. Calculate the Gypsum (lbs/afs) required to reduce ESP to 5%.
c. Does the soil contain enough lime to reduce ESP to 5% if S were used instead of gypsum? How much S (lbs/afs) is required to reduce ESP?
11. A farmer wants to grow wheat on a sodic soil. The CEC = 30 meq/100g and the ESP = 18%. He needs to reduce the ESP to 6%. Calculate the gypsum required (lbs/A‑ft) to amend this soil. What is the minimum quantity of lime the soil must contain to use S as an amendment (express as %CaCO3)? Calculate the quantity of S needed (lbs/a-ft).
12. A laboratory analysis showed that a silt loam soil contained 4 meq Na+/per 100g soil. Soil pH = 8.7 and CEC = 15 meq/100g soil. The exchangeable K+ percent is 4%. What is the ESR of this soil? Determine the amount of CaSO4·2H2O needed to reduce the exchangeable Na+ to 5% in the surface foot of soil.
13. A golf course manager has a golf green that is thinning. A soil test indicates that the following:
CEC = 4 meq/100g 800 ppm Ca (soil)
pH = 8.4 48 ppm Mg (soil)
EC = 8 mmhos/cm 78 ppm K (soil)
230 ppm Na (soil)
What would you recommend (lbs/1000ft2) ? Show all calculations
14. A NC Coastal Plain organic soil has a pH of 4.5 and a CEC = 30 meq/100g. What lime rate would you recommend? A dealer sells 80% CCE lime with the following characteristics: 50% < 60 mesh; 30% < 8-60 mesh; 20% > 8 mesh. How much lime material would you apply? Use curve below and show all work.
15. Answer the following questions for the soil data listed below.
Exchangeable Cations Cations in Saturated Extract
(ppm Soil) (ppm solution)
Ca 1600 180
Mg 600 20
Na 1000 900
K 600 5
CEC (me/100g) = 17 pH (sat’d paste) = 8.6
CaCO3 (%) = 2 ECse (mmho/cm) = 4.5
a. Calculate CEC and compare with measured CEC. Suggest a reason why the two values may be different.
b. Calculate SAR and estimate SAR from the exchangeable cation data.
c. Calculate and estimate ESR and ESP.
Why Work with Us
Top Quality and Well-Researched Papers
We always make sure that writers follow all your instructions precisely. You can choose your academic level: high school, college/university or professional, and we will assign a writer who has a respective degree.
Professional and Experienced Academic Writers
We have a team of professional writers with experience in academic and business writing. Many are native speakers and able to perform any task for which you need help.
Free Unlimited Revisions
If you think we missed something, send your order for a free revision. You have 10 days to submit the order for review after you have received the final document. You can do this yourself after logging into your personal account or by contacting our support.
Prompt Delivery and 100% Money-Back-Guarantee
All papers are always delivered on time. In case we need more time to master your paper, we may contact you regarding the deadline extension. In case you cannot provide us with more time, a 100% refund is guaranteed.
Original & Confidential
We use several writing tools checks to ensure that all documents you receive are free from plagiarism. Our editors carefully review all quotations in the text. We also promise maximum confidentiality in all of our services.
24/7 Customer Support
Our support agents are available 24 hours a day 7 days a week and committed to providing you with the best customer experience. Get in touch whenever you need any assistance.
Try it now!
How it works?
Follow these simple steps to get your paper done
Place your order
Fill in the order form and provide all details of your assignment.
Proceed with the payment
Choose the payment system that suits you most.
Receive the final file
Once your paper is ready, we will email it to you.
Our Services
No need to work on your paper at night. Sleep tight, we will cover your back. We offer all kinds of writing services.
Essays
No matter what kind of academic paper you need and how urgent you need it, you are welcome to choose your academic level and the type of your paper at an affordable price. We take care of all your paper needs and give a 24/7 customer care support system.
Admissions
Admission Essays & Business Writing Help
An admission essay is an essay or other written statement by a candidate, often a potential student enrolling in a college, university, or graduate school. You can be rest assurred that through our service we will write the best admission essay for you.
Reviews
Editing Support
Our academic writers and editors make the necessary changes to your paper so that it is polished. We also format your document by correctly quoting the sources and creating reference lists in the formats APA, Harvard, MLA, Chicago / Turabian.
Reviews
Revision Support
If you think your paper could be improved, you can request a review. In this case, your paper will be checked by the writer or assigned to an editor. You can use this option as many times as you see fit. This is free because we want you to be completely satisfied with the service offered.