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Soil Sampling

Soil Sampling. By: Johnny M. Jessup Agriculture Teacher/FFA Advisor. Introduction. The purpose of taking soil samples is to determine the need for…. Lime Nitrogen Phosphorus Potassium Other nutrient deficiencies may be determined. Purpose of Soil Sampling.

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Soil Sampling

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  1. Soil Sampling By: Johnny M. Jessup Agriculture Teacher/FFA Advisor

  2. Introduction • The purpose of taking soil samples is to determine the need for…. • Lime • Nitrogen • Phosphorus • Potassium • Other nutrient deficiencies may be determined.

  3. Purpose of Soil Sampling • Soil samples may be sent to specialized laboratories to determine…. • Load-bearing or drainage capabilities. • Contamination by chemicals. • Insect and disease presence.

  4. Where to Send Soil Samples? • In North Carolina, soil samples are sent to Agronomic Division of the NC Dept. of Agriculture & Consumer Services.

  5. When to Take Soil Samples? • Soil samples may be taken anytime of the year, but…. • Adequate time is needed to implement laboratory recommendations in time for the crop to be planted.

  6. When to Take Soil Samples? • For fall planting, sample should be taken in the spring. • For spring planting, sample should be taken in the fall.

  7. Proper Sampling Procedures • Get soil sample information sheets and cartons. • Clean tools and containers. • Plastic bucket. • Soil tube or auger. • Take one composite sample from each uniform area.

  8. Proper Sampling Procedures • Take 10 to 15 small cores or slices from the large unifrom area. • Take core or slices about 4” deep for lawns and about 6” deep for fields. • Mix the cores or slices together in a clean bucket and take a sample of about one pint to represent the area sampled.

  9. Proper Sampling Procedures • Complete the sample information sheet and carton information. • Draw a map and keep a record of where you sampled and sample numbers. • Include the information sheet with carton of soil “sample” and mail or take to the appropriate testing laboratory.

  10. Proper Sampling Procedures • Avoid unusual areas unless you want to get a sample of the unusual area only so that it can be treated. • Such as dead or yellow spots in lawns or field.

  11. Soil Test Reports • Provides the results of the laboratory analysis and suggests…. • Fertilization program • Lime application • Possibly other treatments based on the test results.

  12. Reading Soil Test Reports • Actual nutrients are reported in (ppm) parts per million. • To help plant producers understand the report the following are also used: • High • Low • Very low • Very high • Slightly acid • Etc.

  13. Acidity vs. Alkalinity • Level of acidity or alkalinity is shown by the pH.

  14. pH Scale

  15. Ph Scale Review • What would be a pH of 7.0? • Neutral • What would a Ph pf 6.3 be? • Moderately acidic. • What would a pH of 7.2 be? • Slightly alkaline.

  16. Additional Support • If more info/assistance is needed, the following people can be contacted: • Cooperative Extension Agent • Agricultural Education Teacher • Other knowledgeable people that work with soil test reports.

  17. Designed By: • Johnny M. Jessup; FFA Advisor • Hobbton High School

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