LPNNRD Certification Example

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LPNNRD Certification Example

  1. 1. Know how. Know now. Lower Platte North NRD Certification Training Working Together To Preserve Our Ground Water for Future Generations Presented in Cooperation by
  2. 2. Know how. Know now. Certification Training Format  First - Test  Questions on nitrogen and water  management  Instead of written test, we will use audience response cards  No failing grades, just want to see what kind of job we have done Second – NRD Update
  3. 3. Know how. Know now. Audience Response Cards Press button you think is correct answer No need to press GO button Reply is anonymous Will not work as calculator so please don’t take home
  4. 4. Know how. Know now. Practice Question : What Price are you Waiting for to sell your remaining 2010 corn? 1. Already sold it 2. $6.00 3. $7.00 4. $8.00 5. $4.00 after the market 48% 24% 19% crashes 5% Already sold i... $6.00 5% $7.00 $8.00 $4.00 after th...
  5. 5. Know how. Know now. Ready?
  6. 6. Know how. Know now. Which factor has the biggest influence on the amount of residual nitrate-nitrogen present in the spring? 1.Amount of nitrogen 52% 38% la in fa l Ra Th e pr e vi ou s nd i.. c. .. r. .. fn it nt o ou . 10% Am fertilizer applied to previous crop 2.The previous crop 3.Rainfall and irrigation amounts
  7. 7. Know how. Know now. Correct Answer – ? Depends on the Year and the Field  Each of these factors plays a role in   determining how much residual nitratenitrogen is present in the spring Depending on the year, any one these could be the biggest factor in determining how much residual N is present Which one is the biggest factor this year?
  8. 8. Know how. Know now. The estimated nitrogen credit for a corn crop following soybeans yielding 60 bushels on a medium textured soil is: 43% 1.30 lb/acre 2.45 lb/acre 3.60 lb/acre 4.75 lb/acre 33% 24% ac re 75 lb / ac re 60 lb / ac re lb / 45 30 lb / ac re 0%
  9. 9. Know how. Know now. Correct Answer – 2 – 45 lbs/Acre  UNL recommendation is 45 lbs/acre nitrogen credit
  10. 10. Know how. Know now. However:  USDA-ARS research in Nebraska over 20   years indicated average credits of 65 lbs/acre for irrigated fields and 55 lbs/acre for dryland fields 45 lbs/acre is conservative to account for year to year variation For soybeans yielding under 30 bushels, use 1 lb N / bushel credit
  11. 11. Know how. Know now. Which of the following should a nitrogen credit not be allowed for: 62% 1. Previous legume 19% an ur e So i ua l sid Re M .. l. H lp So i at ... Irr ig at io n w gu m le us vi o 10% 5% ... 5% Pr e crops 2. Irrigation water with 10 or more ppm nitrate-nitrogen 3. Soil pH 4. Residual Soil Nitrate 5. Manure
  12. 12. Know how. Know now. Answer – 3 – Soil pH
  13. 13. Know how. Know now.
  14. 14. Know how. Know now.
  15. 15. Know how. Know now.
  16. 16. Know how. Know now. Nitrate-Nitrogen is: 1.Held by clay and 78% 17% la va i Un a ob ile m y bl e an ... a. .. y cla Ve r d He l to ... 4% by organic matter and can’t be lost to leaching 2.Very mobile and can be lost to leaching 3.Unavailable to plants until is broken down by bacteria
  17. 17. Know how. Know now. Answer – 2 – Very mobile  Nitrate nitrogen has a negative charge  Clay and organic matter also have a negative charge  Results in a very mobile nutrient that is subject to leaching
  18. 18. Know how. Know now. At the end of the season there is _________ residual nitratenitrogen in the soil: 92% 1. Never 2. Seldom 3. Always 4. Occasionally 4% 4% ly s Oc c as io na l ay Al w do m Se l Ne ve r 0%
  19. 19. Know how. Know now. Answer – 3 - Always  Mineralization of nitrate-nitrogen from  organic matter occurs throughout growing season No crop can uptake 100 % of nitrate-nitrogen in soil
  20. 20. Know how. Know now. How much nitrogen is potentially lost per day from denitrification in o saturated 60 F soils 1. 0 % 2. 2-3% 3. 4-5% 4. 10% 50% 27% 23% 10 % 45% 23% 0% 0%
  21. 21. Know how. Know now. Answer – 2 – 2 to 3 %     Denitrification - Process of anaerobic bacteria in soil converting nitrate-N into gaseous forms (nitric oxide, nitrous oxide) which can be lost to the atmosphere University of Illinois data  1 to 2 % - Below 55 0F  2 to 3 % - 55 to 65 0F  4 to 5 % - Temps above 65 0F Complicated process that is difficult to estimate accurately Decision to apply additional N is complicated by stand loss and plant stunting, and nitrate leaching
  22. 22. Know how. Know now. Which is likely to cause more yield loss when irrigating: 1.Applying 75 88% percent of crop ET 2.Applying 125 percent of crop ET in g Ap pl y Ap pl y in g 75 12 5 p. .. pe ... 12%
  23. 23. Know how. Know now. Answer – 2 – 125% of ET Neb Guide G1904
  24. 24. Know how. Know now. Which system has the greatest potential for N loss: 96% 1.Fall applied n. .. pp lie d la ss a dr e eSi d Fa l pp ... n at io tig Fe r pp lie d la 4% 0% n. .. 0% Fa l nitrogen with Agrotain 2.Fertigation 3.Side-dress applications 4.Fall applied nitrogen
  25. 25. Know how. Know now. Answer – 4 – Fall Applied Nitrogen  Nitrification inhibitors like Agrotain slow conversion of ammonium to nitrate  Fertigation and side dressing results in nitrogen application closer to timing of crop uptake
  26. 26. Know how. Know now.
  27. 27. Know how. Know now.
  28. 28. Know how. Know now. How Do You Apply The Majority of Your Nitrogen Fertilizer? 1.Anhydrous – Fall 39% 2. Anhydrous – Spring 3. UAN – 28% or 32% - 9% r 0% Ot he Ur e. .. 0% ea d ga te d Dr y Sp r 3. .. Fe rti UA N –2 8% or 3. .. or UA N –2 8% or –2 8% s– UA N ou hy dr 3. .. .. 0% UA N Fa s– ou An hy dr An 13% Sp . ... Broadcast 17% 4. UAN – 28% or 32% Injected 5. UAN – 28% or 32% Sidedress 6. UAN Fertigated 7. Dry Spread Urea 8. Other 22%
  29. 29. Know how. Know now. If you answered 3- UAN – 28% or 32% Broadcast, Do You No-Till? No 22% Ye s 1.Yes 2.No 78%
  30. 30. Know how. Know now. Ammonia volatilization with no-till surface application  Concern with UAN and urea  Urea and ammonium are converted to ammonia gas, which is lost to the atmosphere  High urease activity in crop residues  Crop residues prevent urea or UAN from reaching the soil Source – Charlie Wortmann From: Better Crops
  31. 31. Know how. Know now. What percent of UAN fertilizer can potentially volatilize? 28% 24% 10 0% 75 % 50 % 12% 25 % 1.25% 2.50% 3.75% 4.100% 36%
  32. 32. Know how. Know now. Answer – 3 – 75%  UAN is made up of:  50 % Urea - N  25 % Ammonium – N  25 % Nitrate – N  All but nitrate – N can potentially volatilize
  33. 33. Know how. Know now. To accurately estimate residual soil nitrate-nitrogen, you should: 88% 1. Collect sample cores to 8 inch depth 2. Separate sample cores in depth increments to 3 feet 3. Collect 4 random soil cores per sample 13% Co l le ct 4 ra nd ... pl ... sa m e ar at Se p Co l le ct sa m pl e. .. 0%
  34. 34. Know how. Know now.
  35. 35. Know how. Know now. Answer – 2 – Separate Sample Cores in Depth Increments
  36. 36. Know how. Know now. Normally, how much water is required by corn at growth stage “R5 ¼ milk line” to reach maturity? 1. 5.0 inches 2. 3.75 inches 3. 2.25 inches 4. 1.0 inches 61% 22% in ch es 1. 0 he s in c 2. 25 in c he s 9% 3. 75 5. 0 in ch es 9%
  37. 37. Know how. Know now. Answer – 2 – 3.75 inches
  38. 38. Know how. Know now. From Neb Guide G1871 – Predicting the Last Irrigation of the Season
  39. 39. Know how. Know now. Which condition would result in reduced crop water use? 88% 1.Clear Sunny day 2.90 degree .. at iv e. rH o. .. 90 % Re l Pe M ile re e de g 90 ar Su nn Te m yd a. .. p. .. 0% Cl e 8% 4% 30 Temperatures 3.30 Mile Per Hour Wind 4.90 % Relative Humidty
  40. 40. Know how. Know now. Answer – 4 – 90% Relative Humidity  Many factors affect crop water use  Sunny versus cloudy day  Wind speed  Crop growth stage  Humidity  Temperature
  41. 41. Know how. Know now. To obtain more accurate soil test results, a field should be divided according to patterns of : 92% ab o. .. yp e Al l of t he lT ap hy 0% To po gr Cr op p in g hi st o. .. 0% 8% So i 1.Cropping history 2.Topography 3.Soil Type 4.All of the above
  42. 42. Know how. Know now. Answer – 4 – All of the Above   Cropping history, topography, and soil type all affect soil test results Watch for old lanes, homesteads, feed lots
  43. 43. Know how. Know now. Which soil water monitoring tool offers the best combination of accuracy and price: 55% 1.Soil probe 2.Watermark sensor 3.Capacitance probe 4.Neutron probe 32% pr o pr be ... 5% tr o Ne u ac i Ca p n e ta nc k ar er m W at So i lp se ro be ns ... 9%
  44. 44. Know how. Know now. Answer – 2 – Watermark sensor  Watermark soil water sensors offer the following advantages compared to a soil probe:  More accurate, don’t rely on experience  Can provide soil water status down to 4 feet  Compare same spot week to week  Less labor during growing season
  45. 45. Know how. Know now. Lower Platte North NRD NAWMDN Program     Partnership between Lower Platte North NRD and UNL Extension to help growers increase their irrigation management Provide cost share on equipment and hands on assistance to install and use Watermark sensors and ET Gage. Had 45 producers participate in 2010 Looking for 40 growers throughout the NRD to participate in 2011.
  46. 46. Know how. Know now. Which of these factors does the UNL nitrogen recommendation for corn not account for ? 1. Expected yield 2. Residual soil nitrate N 3. Soil organic matter 67% 21% 8% 4% an d ni tr o ... t i. .. Co rn at io n ... Ap pl ic of Ty pe rg an lo So i ni tr og m ... 0% ic so i ua l Re sid te d yi el d l. .. 0% Ex pe c content 4. Type of nitrogen fertilizer 5. Application timing 6. Corn and nitrogen price
  47. 47. Know how. Know now. Answer – 4 – Type of Nitrogen Fertilizer Recommendation in lb N / acre = 35 + (1.2 x Yield Goal) Minus - (0.14 x Yield Goal x % Organic Matter) - (8 x residual soil nitrate) - (other credits such as legume, manure, nitrates in irrigation water) Then multiplied by × fA = Correction factor for application timing × fR = Correction factor for Corn to Nitrogen price ratio
  48. 48. Know how. Know now. UNL Corn Nitrogen Calculator
  49. 49. Know how. Know now. Cropwatch.unl.edu
  50. 50. Know how. Know now. Fall applied nitrogen should not be applied until the soil temperature is at or below: 73% 14% ºF 50 ºF 55 ºF 60 ºF 9% 5% 40 1.60 ºF 2.55 ºF 3.50 ºF 4.40 ºF
  51. 51. Know how. Know now. Answer – 3 – 50 ºF   Conversion of ammonium to nitrate slows below 50 ºF pH, moisture and plant residue will effect conversion rate.
  52. 52. Know how. Know now. To determine a realistic yield goal for corn you would use your five year field average minus an unusual year. What percent increase would you add to the average to determine the yield goal: 1.15 2.10% 3.5 % 4.0 % 55% 36% 0% 5% 5% 10 % 15 5%
  53. 53. Know how. Know now. Answer – 3 – 5 %  Annual Fertilizer Application Report  For Corn ► Line 6  Yield Goal (Bushels/Acre) (Past 5 year average + 5% recommended)  “The expected yield should be about 105 percent of the five-year average.” EC 117 – Fertilizer Suggestions for Corn
  54. 54. Know how. Know now. Regardless of soil temperature, the earliest date the Lower Platte North NRD allows the fall application of nitrogen fertilizer on non-sandy soil is: 1.October 2.November 1st 3.November 15th 4.December 1st 71% 1st 14% 1s t 5% D ec em r1 be N ov em be r 5t h st r1 be N ov em O ct ob e r1 st 10%
  55. 55. Know how. Know now. Answer – 2 – November 1st  Ground Water Management Area Rules and Regulations - Implemented January 1, 1997  Section E Ground Water Quality Management Area – Phase One  Rule 8 - Fertilizer Application on Non-sandy Soils  No fall applications of N fertilizer (commercial) for row crops will be allowed on non-sandy or fine textured soils until after November 1. ◄  Rule 9 - Fertilizer Application on Sandy Soils  Fall and winter applications of N fertilizer (commercial) for row crops will be prohibited on sandy soils. Commercial fertilizer can be applied on sandy soils after March 1 of the crop year.
  56. 56. Know how. Know now. Water in Nebraska is owned by? 71% 1.County 2.Land owner 3.Local NRD 4.State of Nebraska 25% 4% ... D br a NR Ne al St a te of Lo c ne r ow d La n Co un ty 0%
  57. 57. Know how. Know now. Answer – 4- State of Nebraska  Correlative Rights - Groundwater  Land owners are allowed to drill wells and extract groundwater from an underlying aquifer for beneficial purposes subject to management by the public
  58. 58. Know how. Know now. Questions?
  59. 59. Know how. Know now. Evaluation
  60. 60. Know how. Know now. Which of the Following Do You Consider Your Primary Occupation? 1.Farmer 2.Crop Consultant 3.Agribusiness Representative 4.Public Agency Representative 5.Other 71% 17% 13% r he Ot er ... an ... rm Fa ult en cy ns c Ag Co rib us in bli op Ag Pu Cr 0% es s R. .. 0%
  61. 61. Know how. Know now. Number of Acres that You Directly Manage: 1.0 acres 2.1 to 500 acres 3.501 to 1000 acres 4.1001 to 2000 acres 5.2001 to 5000 acres 6.5001 to 10000 acres 7.More than 10000 acres 30% 30% 22% 13% 4% to s 100 0 acr to es 500 1 501 acre 0% 100 0 ac.. 1 to . 200 200 0 1 a... to 500 500 0 1 a... to Mo 100 re 00 tha ... n 100 0... 0%
  62. 62. Know how. Know now. As a result of this educational experience, I have an improved knowledge of the principles of nitrogen losses: 1. No Improvement in Knowledge 2. Slight Improvement in Knowledge 3. Moderate Improvement in Knowledge 4. Significant Improvement in Knowledge 5. Very Significant Improvement in Knowledge 38% 25% 17% 17% .. ve ... ... Im ... pro nt Sig nif ica ry me nt. pro Im ve e rat Im nif ica pro gh t Ve Sig Im Sli Mo de No ... 4%
  63. 63. Know how. Know now. As a result of this educational experience, I am likely to adopt the UNL nitrogen recommendations 1. I have no plans to do this 2. I am already doing this 3. I plan to expand or modify my current 0 of 5 ... ... ... he mo ed d.. . 0% re sta ex pa pla n.. . 0% to ea dy to no 0% nt n alr ve I pla I am I ha 0% I pla 0% I ne practices 4. I plant to start this in the future 5. I need more help to do this
  64. 64. Know how. Know now. Have You Previously Attended a Lower Platte North NRD Certification Training? 1.Yes 2.No 57% No Yes 43%
  65. 65. Know how. Know now. After attending a Lower Platte North NRD Certification I have adopted practices that improve nitrogen fertilizer application 1. No 2. Yes - Slight Improvement 3. Yes - Moderate Improvement 4. Yes - Significant Improvement 5. Yes - Very Significant Improvement 38% 31% 15% No e... t I... ific. .. erat - Sligh - Sign - Very - Mod Yes Yes Yes Yes 8% Sig.. . 8%
  66. 66. Know how. Know now. Extension is a Division of the Institute of Agriculture and Natural Resources at the University of Nebraska– Lincoln cooperating with the Counties and the United States Department of Agriculture. University of Nebraska–Lincoln Extension educational programs abide with the nondiscrimination policies of the University of Nebraska–Lincoln and the United States Department of Agriculture.

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