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Interpreting Plant Analysis Reports

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• Northwood, ND 58267 P.O. Box 510 Hwy 15 • • Fax (701) 587-6013 (701) 587-6010 Home page: agvise.com • Benson, MN 56215 • P.O. Box 187 902 13th St. N. • Fax (320) 843-2074 (320) 843-4109 Interpreting Plant Analysis Reports N S Zn N FIELD ID West 80A SECTION 20 P.O. BOX 510, NORTHWOOD, ND 58267 SAMPLE ID Stunted Corn QTR SE (701) 587-6010 COUNTY Polk 5 ACRES 80 WE TWP Marley VARIETY 2490 SUBMITTED FOR: SUBMITTED BY: LE0002 MR. GROWER Fe GREEN ACRES AGRONOMY S REF # 1534 LAB # 10496 DATE SAMPLED 6/9/2011 DATE RECEIVED 6/10/2011 DATE REPORTED 6/12/2011 CROP CORN GROWTH STAGE CORN 2 TO 12 IN K NUTRIENT LEVEL IN CROP ppm Analysis in Percent Analysis in Parts Per Million P2O5-P NO3-N NP Ca Mg Na Zn Fe Mn Cu B%Cl Phosphate Nitrate Nitrogen Phosphorus Potassium Sulfur Calcium Magnesium Sodium Zinc IronManganese Copper BoronChloride ppm Al 4.0 0.25 3.5 0.35 1.00 0.60 0.03 11 250 100 12 11 S L S S S S S L S S S S NUTRIENT SUFFICIENCY RANGE 3.5 .35 3.0 .2 .3 .21 0 20 50 50 6 6 TO TO TO TO TO TO TO TO TO TO TO TO 5.0 .80 5.0 .5 1.6 .80 .1 75 300 160 20 25 D.R.I.S. INDEX VALUES P 2-37 24 41629-58 15 14 Zn K Interpreting a Plant Analysis Report 10. Variety: Identifies which variety the plant sample is from. This information is helpful when putting Plant nutrient analysis is a useful management tool. together a fertility management plan. While it is helpful to know the visual symptoms of nutrient deficiencies on plants, determining nutrient deficiencies 11. Reference Number: The reference number is used to visually is very difficult. In many situations, an analysis of track plant sample during laboratory analysis. good and bad plant samples, in addition to good and bad 12. Laboratory Number: A distinct laboratory number soil samples, will provide the answer. is assigned to each plant sample being tested. This To gain the most information from plant nutrient number is used in quality control in the laboratory. analysis, it is important to become familiar with the plant 13. Date Sampled: Indicates the day the sample was analysis report. This guide helps explain where all of the collected. information is located on the plant analysis report. Basic information about each nutrient and some information 14. Date Received: Indicates the day the sample was on visual deficiency symptoms is also included in this received at the laboratory. guide. Please remember to follow accepted guidelines for 15. Date Reported: Indicates the day the sample analysis collecting plant samples for nutrient analysis (see the plant results were printed. sampling guide for additional information). 16. Crop: Indicates which crop the plant sample represents. Information Located on the Plant 17. Growth Stage: Indicates the growth stage of the Analysis Report crop when the plant sample was collected. Stage of 1. Submitted for: The name of the grower for whom growth is critical for interpreting the nutrient analysis the sample has been submitted. This may also be properly. the name of the farm manager, consultant, etc. Some customers prefer to use a grower number instead of a Plant Nutrient Information grower name. 18A. Total Nitrogen (total N): Nitrogen is a critical part 2. Submitted by: The name of the firm or individual who of proteins in the plant. It is also an important part of has submitted the sample to the laboratory. This is the chlorophyll and plays a key role in photosynthesis. person or business that will receive the plant analysis Nitrogen deficient plants usually have a pale green report and be billed for the laboratory analysis. or yellow color. In grasses, the yellowing usually 3. Field ID: Identifies the field or area where the plant starts at the leaf tip and goes down the middle of sample was collected. The Field ID can be made up of the leaf. Because nitrogen is mobile in the plant, the any combination of letters or numbers (16 character older leaves will show the symptoms first. The total limit). N content of a plant includes all forms of nitrogen in the plant tissue. The total N content represents the 4. Sample ID: Identifies each sample when there is nitrogen status of a crop up to that point in the growing more than one sample from each field (16 character season, but does not predict the nitrogen status of the limit). crop in the future. 5. County: Identifies the county where the plant sample 19. Total Phosphorus: Phosphorus is important for root was collected (16 character limit). growth, seed production and crop maturity along with 6. Township: Identifies the township where the plant many other functions. Symptoms of plants deficient sample was collected (30 character limit). in phosphorus include stunted growth, delayed maturity and reduced see production. In young 7. Section: Identifies the section of land where the plant plants, phosphorus deficiency may appear as purple sample was collected (2 character limit). coloring of the older leaves. Phosphorus is mobile in 8. Quarter: Identifies which quarter of the section where the plant, so deficiency symptoms appear first on the the plant sample was collected (2 character limit). older leaves. The total phosphorus content of a plant includes all forms of phosphorus in the plant tissue. 9. Acres: Identifies the number of acres in the field where the plant sample was collected (3 character limit). Photos on the cover courtesy of IPNI and North Dakota State University Extension Service. 2 N FIELD ID West 80A 3 SECTION 20 7 P.O. BOX 510, NORTHWOOD, ND 58267 SAMPLE ID Stunted Corn 4 QTR SE 8 (701) 587-6010 COUNTY Polk 5 ACRES 80 9 WE TWP Marley 6 VARIETY 2490 10 SUBMITTED FOR: 1 SUBMITTED BY: LE0002 2 MR. GROWER GREEN ACRES AGRONOMY S 11 REF # 1534 LAB # 10496 12 DATE SAMPLED 6/9/2011 13 DATE RECEIVED 6/10/2011 14 DATE REPORTED 6/12/2011 15 CROP CORN 16 GROWTH STAGE CORN 2 TO 12 IN 17 NUTRIENT LEVEL IN CROP ppm Analysis in Percent Analysis in Parts Per Million P2O5-P NO3-N NP Ca Mg Na Zn Fe Mn Cu B%Cl Phosphate Nitrate Nitrogen Phosphorus Potassium Sulfur Calcium Magnesium Sodium Zinc IronManganese Copper BoronChloride ppm Al 4.0 0.25 3.5 0.35 1.00 0.60 0.03 11 250 100 12 11 18 19 20 21 22 23 24 25 26 27 28 29 30 31 S L S S S S S L S S S S NUTRIENT SUFFICIENCY RANGE 32 3.5 .35 3.0 .2 .3 .21 0 20 50 50 6 6 TO TO TO TO TO TO TO TO TO TO TO TO 5.0 .80 5.0 .5 1.6 .80 .1 75 300 160 20 25 D.R.I.S. INDEX VALUES 33 2-37 24 41629-58 15 14 20. Potassium: Potassium is involved in many 21. Sulfur: Sulfur is a component of plant proteins. physiological processes including protein synthesis Symptoms of sulfur deficiency can look similar to and maintaining the water balance in the plant. a mild nitrogen deficiency. The only difference is a Potassium deficiency symptoms include reduced sulfur deficiency appears sooner on the newer growth growth and yellowing or burning of the leaf edges. because sulfur is not very mobile in the plant. Sulfur Other symptoms include reduced straw or stalk deficiencies are more common on sandy soils with strength, reduced disease resistance and reduced low organic matter. In high rainfall years, sulfur winter hardiness of perennial crops. Since potassium deficiencies can occur on most soil types due to is mobile in the plant, the symptoms appear on the leaching of sulfur. Sulfur deficiency is more common older leaves first. Sandy soils are more likely to be in crops such as canola and alfalfa due to higher sulfur deficient in potassium. requirements. 3 22. Calcium: Calcium is an important part of cell walls. with some varieties being more sensitive than others. Calcium deficiency in field crops is rare in the Iron deficiencies are common on soils that have high Midwest. When a soil is limed to an acceptable pH pH (>7.5), high soluble salts (>0.7 mmhos/cm) and (6.0), calcium is usually adequate. Agricultural lime high carbonate content (>1.0%). Plant analysis is not is composed of calcium and magnesium carbonates a very useful tool for confirming iron deficiency in (CaCO3 & MgCO3). The Ag lime applied has field crops. The dust that normally occurs on plant enough calcium supplied by the calcium carbonate tissue contains enough iron to contaminate plant (CaCO3) for good plant growth. Areas where calcium samples. Visual symptoms are used to confirm iron deficiencies may occur are sandy irrigated soils with a deficiency. low soil pH (<6.0). Symptoms of calcium deficiency 27. Manganese: Manganese is essential for many include black scorched leaf tips and die-back of reactions in the plant and is essential for chloroplast growing points because calcium is not mobile in production. Manganese deficiency symptoms include the plant. Boron can cause the same symptoms, but interveinal chlorosis on the newer leaves. These calcium deficiency does not promote lateral shoot symptoms are difficult to distinguish from symptoms development like boron deficiency does. of iron deficiency. 24. Magnesium: Magnesium is a key component of 28. Copper: Copper is essential in forming enzyemes chlorophyll and is essential for photosynthesis.
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