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Agronomy 101 Otherwise known as: Manure Happens. Topics Manure  Characteristics  Nutrient content N-P-K  Factors affecting nutrient content of manure.

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Presentation on theme: "Agronomy 101 Otherwise known as: Manure Happens. Topics Manure  Characteristics  Nutrient content N-P-K  Factors affecting nutrient content of manure."— Presentation transcript:

1 Agronomy 101 Otherwise known as: Manure Happens

2 Topics Manure  Characteristics  Nutrient content N-P-K  Factors affecting nutrient content of manure  Differences amongst animal species  Sampling requirements and methods  Application equipment

3 Topics Record and manure management  Nutrient Budgets  Worksheets

4 Definitions Subp. 4. Animal manure or manure.  “Animal manure” or “manure” means poultry, livestock, or other animal excrete or mixture of excrete with feed, bedding, precipitation, or other materials.  https://www.revisor.mn.gov/rules/?id= https://www.revisor.mn.gov/rules/?id=

5 Definitions Subp. 13b. Manure – contaminated runoff  “Manure-contaminated runoff” means a liquid that has come into contact with animal manure and drains over land from any animal feedlot, manure storage area, or animal land application site.  https://www.revisor.mn.gov/rules/?id= https://www.revisor.mn.gov/rules/?id=

6 7020 and NPDES Definitions Solid Manure  Manure Stockpiling Sites  Subp. 1, item B. Manure must not be placed on a stockpiling site unless a three-to- one horizontal-to-vertical ratio can be maintained or the manure has at least, a 15 percent solids content  https://www.revisor.mn.gov/rules?id= https://www.revisor.mn.gov/rules?id=

7 7020 and NPDES Definitions NPDES Permit language  Solid Manure (15 percent or more solids, and handled as a solid) Winter Application  Liquid Manure is considered to be any Manure that does not meet the definition of “solid Manure” provided in item 3.  document.html?gid= document.html?gid=13482

8 Manure Sampling Requirements NPDES = annually Storage area for 100 au or more = once every 4 years 300 au or more farms = for 3 consecutive years than once every 4 years LAND APPLICATION OF MANURE. Subp. 2.Manure nutrient testing requirements. https://www.revisor.mn.gov/rules/?id= https://www.revisor.mn.gov/rules/?id=

9 Manure Sampling Recommendations Composite samples  How is the manure handled/managed  Housing – bedding – equipment  Liquid or solid manure  Storage system agitated  Custom hauler Best time to sample – when applying manure Recommend annual sampling Recommend running averages ient/manure/mnnutr6.pdf ient/manure/mnnutr6.pdf

10 Reference Materials Beer and Baking U of M and Dept of Ag – Nutrient & Manure Management Tables and – Nutrient Management Tables Excellent reference materials

11 Nitrogen Availability and Loss, as Affected by Method of Manure Application and Animal Species Year Available% of Total Nitrogen Available Per Year Broadcast Incorporation TimingInjection After 96 hrs. 12 to 96 hrs. Within 12 hrs. SweepKnife Beef Year Year 225 Lost Dairy Year Year 225 Lost Swine Year Year 215 Lost Poultry Year Year 225 Lost

12 Liquid Manure Application Equipment

13 Double disks manure applicator

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15 Sweep injection manure applicator

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17 Knife injection manure applicator

18 Broadcast solid manure applicators Typically used with solid manure and semi-solid manures End gate spreaders are used with dry manure and bedded pack manure Side-slingers used with semi- solids or slurry manures

19 End gate spreader

20 Side-slinger spreader

21 or Toyota Cowrolla

22 Nutrient Budgets Method to calculate amount of manure and or fertilizer to apply to planned crop  Calculations use MN-extension formulas  Variables include:  Crop rotation and yield goals  Manure analysis and method of application  Fertilizer use  Beer & Baking or Balancing your Checkbook

23 Nutrient Budgets crop needs Crop rotation = nutrient recommendation

24 Nutrient Budgets availability Type of animal and method of application = nutrient availability

25 Nutrient Budgets what’s in your account Calculate any 2 nd year manure credit Based on previous years total manure nitrogen applied

26 Nutrient Budgets Example Corn following corn = 180 pounds of nitrogen Finishing swine manure analysis for N-P-K: – pounds/1000 gallons Method of manure application: – Broadcast immediate incorporation with disks: Nitrogen availability =75% Starter fertilizer credit: 5 – 10 – 0 pound N-P-K

27 How many #s of N are available? A.43.5# B.35.6# C.58.4# D.40.3#

28 Nutrient Budgets Example

29 How many gallons of manure can be applied per acre? A.4150 gallons / acre B.3500 gallons / acre C.4000 gallons / acre D.6050 gallons / acre

30 Nutrient Budgets Example

31 180 – 5# N in starter = 175 # nitrogen 58# N in manure x 75% (available N) = ÷ 43.5 = x 1000 = 4000 gallons/acre

32 2 nd Budget Example Work thru the following example: Crop rotation: corn following soybeans Finishing swine manure: 58 – 44 – 40 per 1000/gals of N-P-K Method of application: Sweep injection 4,000 gallons of hog manure applied 2 years ago 5 gallons 28% in herbicide = 15# nitrogen

33 Manure Nutrients Short Form

34 How many gallons of manure can be applied per acre? A.3000 gallons / acre B.1700 gallons / acre C.2000 gallons / acre D.3500 gallons / acre

35 Final Answer Corn on Beans 180# N needed – 40#N from beans = 140#N 140# N – last years manure 35# N = 105#N – (4000 gallon x 15% = 35#N) 105# N – Fertilizer application 15# = 80#N 80#N / 46.4# N per 1000 gallon – (58# N/ 1000 gallon x 80%) = 1700 gallons per acre

36 3rd Budget Example Work thru the following example: Crop rotation: corn following corn following average alfalfa Dairy manure: 10 – (N-P-K pounds/ton) Method of application: Broadcast incorporated within 2 days at 25 tons/acre Manure applied 2 years ago at 25 tons/acre use same analysis (10-3-6)

37 How many ton can be applied per acre? A.32.5 ton per acre B.17 ton per acre C.19 ton per acre D.21.5 ton per acre

38 Final Answer Corn on corn with alfalfa 2 years ago – 130#N – (180# - 50#N from alfalfa 2 years ago) 130#N – last years manure 62#N = 68#N – (25 ton x 10#N/ton x 15% = 62#N) 68#N needed / 4#N ton manure = 17 ton

39 Not a good day to visit the farm

40 Phosphorous High phosphorous soils - added requirements Sensitive areas – > 22 Bray – > 17 Olsen Over 300’ from sensitive areas – > 75 Bray – > 60 Olsen Interim permit required some cases

41

42 Resource

43 Crop Needs

44 Crop Removal

45 Example 1 Soil sample – 72 ppm Bray 450 AU Cattle site Intermittent Stream Average yield 210 bu corn/acre Manure test –

46 Phosphorous Concerns? Over 300’ from sensitive area – No issue with phosphorus – Nitrogen limits Within 300” from sensitive area – Prevent phosphorus buildup – Utilize crop removal figures

47 Example 2 Soil sample – 82 ppm Bray 450 AU Cattle site Intermittent Stream Average yield 210 bu corn/acre

48 How many ton can be applied per acre? A.Determined by Nitrogen limits B.6.2 ton per acre C.5.1 ton per acre D.5.7 ton per acre

49 Questions?


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