Presentation on theme: "Otherwise known as: Manure Happens"— Presentation transcript:
1 Otherwise known as: Manure Happens Agronomy 101Otherwise known as:Manure Happens
2 Topics Manure Characteristics Nutrient content N-P-K Factors affecting nutrient content of manureDifferences amongst animal speciesSampling requirements and methodsApplication equipment
3 TopicsRecord and manure managementNutrient BudgetsWorksheets
4 7020.0300 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.
5 7020.0300 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.
6 7020 and NPDES Definitions Solid Manure Manure Stockpiling SitesSubp. 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
7 7020 and NPDES Definitions NPDES Permit language Solid Manure (15 percent or more solids, and handled as a solid) Winter ApplicationLiquid Manure is considered to be any Manure that does not meet the definition of “solid Manure” provided in item 3.
8 Manure Sampling Requirements NPDES = annuallyStorage area for 100 au or more = once every 4 years300 au or more farms = for 3 consecutive years than once every 4 yearsLAND APPLICATION OF MANURE.Subp. 2.Manure nutrient testing requirements.
9 Manure Sampling Recommendations Composite samplesHow is the manure handled/managedHousing – bedding – equipmentLiquid or solid manureStorage system agitatedCustom haulerBest time to sample – when applying manureRecommend annual samplingRecommend running averages
10 Reference Materials Beer and Baking U of M and Dept of Ag Nutrient & Manure Management Tables andNutrient Management TablesExcellent reference materials
11 Nitrogen Availability and Loss, as Affected by Method of Manure Application and Animal Species Year Available% of Total Nitrogen Available Per YearBroadcast Incorporation TimingInjectionAfter 96 hrs.12 to 96 hrs.Within 12 hrs.SweepKnifeBeefYear 125456050Year 2Lost4020510Dairy55Swine357580701530Poultry
18 Broadcast solid manure applicators Typically used with solid manure and semi-solid manuresEnd gate spreaders are used with dry manure and bedded pack manureSide-slingers used with semi-solids or slurry manures
22 Nutrient BudgetsMethod to calculate amount of manure and or fertilizer to apply to planned cropCalculations use MN-extension formulasVariables include:Crop rotation and yield goalsManure analysis and method of applicationFertilizer useBeer & Baking or Balancing your Checkbook
31 Nutrient Budgets Example 180 – 5# N in starter = 175 # nitrogen58# N in manure x 75% (available N) = 43.5175 ÷ 43.5 = 4.0224.022 x 1000 = 4000 gallons/acre
32 2nd Budget Example Work thru the following example: Crop rotation: corn following soybeansFinishing swine manure: 58 – 44 – 40 per 1000/gals of N-P-KMethod of application: Sweep injection4,000 gallons of hog manure applied 2 years ago5 gallons 28% in herbicide = 15# nitrogen
34 How many gallons of manure can be applied per acre? 3000 gallons / acre1700 gallons / acre2000 gallons / acre3500 gallons / acre#2 – (1700 gal/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#N80#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 alfalfaDairy manure: 10 – (N-P-K pounds/ton)Method of application: Broadcast incorporated within 2 days at 25 tons/acreManure applied 2 years ago at 25 tons/acre use same analysis (10-3-6)
37 How many ton can be applied per acre? 32.5 ton per acre17 ton per acre19 ton per acre21.5 ton per acre#2 – (17 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