fertility central: best cost options and recommendations for different forages
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Fertility Central: Best Cost Options
and Recommendations
for Different Forages
Brian ClarkPrince Georges County
Extension Agent
Ben BealeSt. Mary’s County Extension Agent
Charts and Nutrient Recommendation supplied by
Adam Lyon, Nutrient Management Advisor, St. Mary’s Co.
Some slides and pictures adapted from:Dave Myers
Anne Arundel Extension Agent
Dave Myers
Ben Beale
Why worry about fertility?
Why worry about fertility?
Presentation Objectives
• Review basic fertility needs of forage crops– Basis for recommendations– Differences in legume v/s grass, yields, etc
• Review the commonly available nutrient sources– Understand the advantages and
disadvantages of each– Understand the cost per acre using these
nutrients
Phosphorus, Potassium, Calcium, and Magnesium Recommendations
Based on pre-plant soil tests and yield goal
The lower the soil test value, the higher the nutrient recommendation
Nitrogen RecommendationsNitrogen recommendations are based on crop and yield goals.
Forage Recommendations
Nitrogen recommendations are based on crop and yield goals.
Nitrogen Required to Achieve Average Yield
Orchard
grass
(3 t/
a)
Timoth
y (3 t/
a)
Mill
et (5 t/
a)
Sudangrass
(5 t/
a)
Sorghum
-Sudan (5 t/
a)
Teff (3
t/a)
Tall Fesc
ue (3 t/
a)
Reed Canarygra
ss (3
t/a)
Lespedeza (3
t/a)
Alfalfa
(5 t/
a)0
20406080
100120140160180200
150
180
150 150 150 150 150 150
0 0
2 2.5 3 3.5 40.0
20.0
40.0
60.0
80.0
100.0
120.0
140.0
160.0
180.0
200.0
50.065.0 70.0
85.0100.0
25.0
30.040.0
45.0
50.0
25.0
30.0
40.0
45.0
50.0
Pounds per Year of Nitrogen Required to Achieve Differing Orchardgrass Yields
Yield Goal (Tons/Acre)
LBS
Nit
roge
n/A
cre/
Yea
r
Phosphorus, Potassium, Calcium, and Magnesium Recommendations
• Based on pre-plant soil tests and yield goal
• The lower the soil test value, the higher the nutrient recommendation
0 10 20 30 40 50 60 70 80 90 100 1100
20
40
60
80
100
120
140
160
180
150
114
78
53
37
20 20 20 20 20 20
0
Phosphorus (P) Recommendation (lbs/acre) as a function of Soil Fertility Level (FIV-K) for Orchardgrass (3.0 tons/acre yield goal)
FIV-P
LBS
P20
5/A
cre
Optimum (51-100)
Excessive (>100)Low (0-
25)
Medium (26-50)
0 10 20 30 40 50 60 70 80 90 100 1100
20
40
60
80
100
120
140
160
180
200200
164
128
100
75
5044
3832
2620
0
Potash (K) Recommendation (lbs/acre) as a function of Soil Fertility Level (FIV-K) for Orchardgrass (3.0 tons/acre yield
goal)
FIV-K
LBS
K20
/Acr
e
Optimum (51-100)
Excessive (>100)Low (0-
25)
Medium (26-50)
0 10 20 30 40 50 60 70 80 90 100 1100
20406080
100120140160180200220240260280300320340360 345
311
277
252231
210 201191
180170
160 160
Potash (K) Recommendation (lbs/acre) as a function of Soil Fertility Level (FIV-K) for Alfalfa (5.0 tons/acre yield goal)
FIV-K
LBS
K20
/Acr
e
Optimum (51-100)
Excessive (>100)Low (0-
25)
Medium (26-50)
0 10 20 30 40 50 60 70 80 90 100 1100
20
40
60
80
100
120
105
89
73
60
48
35 33 31 29 27 25
0
Phosphorus (P) Recommendation (lbs/acre) as a function of Soil Fertility Level (FIV-K) for Alfalfa (5.0 tons/acre yield goal)
FIV-P
LBS
P20
5/A
cre
Optimum (51-100)
Excessive (>100)Low (0-
25)
Medium (26-50)
Good recommendations depend on good soil samples
UMD-AGNR Photo Archive; http://www.photos.umd.edu
Fertilizer Options?Fertility Inputs for Forages
Manure
Bio-SolidsCommercial Fertilizer
Legumes
Commercial Fertilizer• Advantages:
– Readily available– Easy to spread– Can apply exactly the amount needed for crop
growth– Nutrients typically available immediately
Commercial Fertilizer• Disadvantages
– Can be Expensive– Nutrients typically available immediately-
leaching– Doesn’t come with any organic matter
Commercial Fertilizer• Best Management Practices
– Soil Test on a regular basis.– Split apply Nitrogen according to crop growth
needs– Be aware of N loss pathways
• Urea-volatilizes quickly. Losses can exceed 50%• Apply shortly before a soaking rain to an
established sod, if possible.– Calibrate spreader and tractor driver
Commercial Fertilizer: Types and Costs
Analysis Price per Ton N P KNitrogenAmmonium Sulfate 21-0-0 24S 245.00$ 0.58$ Urea 46-0-0 425.00$ 0.46$
PhosphateDAP 18-46-0 500.00$ 0.46$ 0.36$ MAP 11-52-0 510.00$ 0.46$ 0.39$ Triple Super P 0-46-0 510.00$ 0.55$
PotashMuriate of Potash 0-0-60 460.00$ 0.38$
Comparing Nutrient Prices within Types of Fertilizers
$0.00
$0.10
$0.20
$0.30
$0.40
$0.50
$0.60
$0.70
$0.58
$0.46 $0.46 $0.46
$0.36$0.39
$0.55
$0.38 N P
K
Cost
per
Pou
nd
Poultry Litter
UMD-AGNR Photo Archive; http://www.photos.umd.edu
2 2.5 3 3.5 40.0
1.0
2.0
3.0
4.0
5.0
6.0
7.0
1.62.1 2.2
2.73.2
0.8
1.01.3
1.4
1.6
0.8
1.0
1.3
1.4
1.6
Perdue Poultry Litter Required (tons/acre) to Achieve Total Ni-trogen Requirement for Differing Orchardgrass Yields (tons/acre)
Yield Goal (Tons/Acre)
Po
ult
ry L
itte
r R
equ
ired
(T
on
s/A
cre)
Average Poultry Litter• Not incorporated, applied in three split
applications. • Cost-share program not currently
available. However, poultry litter does seem to be more available than last year.
Average Poultry Litter• The availability of Nitrogen from Poultry
Litter is dependent upon:– Mineralization rate
• Year 1: 50%• Year 2: 15%• Year 3: 8%
– Temperature• Average analysis for Perdue Poultry Litter:
– 3.0% N (0.3% Ammonium)– 2.5% P– 2.5% K
Figure 2- 4a. Distribution of available nitrogen from organic and ammonium nitrogen components in a typical broiler litter
Unavailable ammonium ni-trogen
Available ammonium ni-trogen
Available organic nitrogen
Unavailable organic nitrogen
This litter contains 60 pounds of total nitrogen and 36 pounds of available nitrogen per ton.
16 lb
20 lb
4 lb
20 lb
Average Poultry Litter• Poultry Litter will be available over a long
period of time- at least 3 years.• 1 ton of poultry litter in first year (No
incorporation) will give:– 31 lbs N– 50 lbs P– 50 lbs K
• Per 1.0 ton of Poultry Litter, N mineralized:– First Year: 31 lbs– Second Year: 10 lbs– Third Year: 5 lbs
Poultry Litter Cost
• Average Rate, including transportation from the shore is $35.00 per ton.
• If using Poultry Litter to only supply Nitrogen, it is a relatively expensive.
• 1 ton, broadcast and not incorporated supplies 31 pounds of Nitrogen.
• Thus, 1 lb of N from PL costs about $1.10 • This approach discounts the value any
other nutrients (P and K) supplied.
Poultry Litter Cost
• If using Poultry Litter to only supply Nitrogen, Phosphorous and Potash on deficient soils, it becomes more of a value.
• 1 ton, broadcast and not incorporated supplies 31 pounds of N, 50 lbs P and 50 lbs K.
• Thus, the cost to replace the entire nutrient value of poultry litter with fertilizer is: $51.26
Applying Poultry Litter to meet N needs will oversupply P
1 2 3 4 50
50
100
150
200
250
300
50
100
150
200
250
20 20 20 20 20
Tons of Poultry Litter Applied per Acre
Lbs
of P
Ap
pli
ed
Blue bar indicates the Phosphorus needed per acre to achieve a 3.0 ton/acre yield goal for Orchardgrass given a Fertility level (FIV-P) of Optimum (51).
Strategies for Poultry Litter• Strategy One:
– Use poultry litter as the first split application to meet any P and K needs.
– As need for P and K diminishes, turn to commercial fertilizer to fill the rest of the yearly nitrogen needs.
• Strategy Two:– Use poultry litter every other year on soils
testing optimal or above. – Monitor P soil levels with regular soil test
Orchardgrass Fertilization BudgetPoultry Litter
Scenario: Soil test results: K-medium, P-medium; Yield Goal -3 tons
Unit lbs/Acre Total $/Acre Broiler Litter 5 tons/A @ 35.00/ton 175.00
(No MDA cost share) Nitrogen 160 (150*) (amount negligible) 0.00Phosphorus 250 (20*) 0.00Potassium 250 (100*) 0.00
Manure & Fertilizer Costs 175.00Manure/Fertilizer Application Costs:Manure spreading 5 ton/acre 25.00 Stock pile Maintenance 10.00
Manure Application Costs 35.00Manure Fertilization Grand Total $210.00 Acre
(*) Amount required to supply N
Beef/Dairy/Swine Manure
UMD-AGNR Photo Archive; http://www.photos.umd.edu
Distribution of Available Nitrogen from Organic & Ammonium Nitrogen Components in a Typical
Dairy Manure (assumes incorporation the same day as application)
Unavailable am-monium nitrogen
Available ammonium nitrogen
Available organic nitrogen
Unavailable organic nitrogen
2.4 lb
3 lb
6 lb
0.6 lb
Average Manure Analysis 1989-1997
Available Stockpile Lagoon Nutrient lbs/ton lbs/1000gal N 3.0 0.24 P 7.0 1.34 K 16.0 5.02 Ca 8.0 1.13 Mg 3.0 0.69 S 1.5 0.05 Mn 0.08 0.004 Zn 0.05 0.002 Cu 0.02 0.003
USNAD, Gambrills MD: No-Tillage System
Tall Fescue Fertilization BudgetDairy/Beef Manure
Scenario: Soil test results: K-medium, P-medium; Yield Goal -5 tons
Unit lbs/Acre Total $/AcreManure (on-farm) 15 tons/acre 0.00Nitrogen 45 (150) 105 lbs @ .46/lb 48.30Phosphorus 105 (40) 0.00Potassium 240 (100) 0.00
Manure & Fertilizer Costs 48.30 Manure/Fertilizer Application Costs:Manure cleanout 1.00/ton 15.00Manure spreading 15 ton/acre 22.00 Fertilizer spreading 12.00
Manure Application Costs 49.00Manure Fertilization Grand Total $97.30/Acre
(*) Amount required
Alfalfa Fertilization BudgetDairy/Beef Manure
Scenario: Soil test results: K-medium, P-medium; Yield Goal -6 tons
Unit lbs/Acre Total $/AcreManure (on-farm) 15 tons/acre 0.00Nitrogen 45 (0) 0.00Phosphorus 105 (80) 0.00Potassium 240 (250) 0.00
Manure & Fertilizer Costs 0.00 Manure/Fertilizer Application Costs:Manure cleanout 1.00/ton 15.00Manure spreading 15 ton/acre 22.00 Fertilizer spreading 0
Manure Application Costs 37.00Manure Fertilization Grand Total $37.00 Acre
(*) Amount required
Granulite 5-3-0• Use is similar to fertilizer. Dehydrated bio-
solid product.• Analysis of 5-3-0
– Mineralization rate of 50%• Contact: Cullin’s Lime for more info in St.
Mary’s• Advantages
– In-expensive, easy to spread, readily available in Baltimore.
Granulite 5-3-0• Advantages
– In-expensive, easy to spread, readily available in Baltimore or from local suppliers
• Dis-advanatages:– Organic material which must mineralize-
nutrients may not be available immediately– Slight odor, though not bad– Bio-solid type product may be an issue with
some landowners
2 2.5 3 3.5 40.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
1.11.4 1.5
1.82.1
0.5
0.60.9
1.0
1.1
0.5
0.6
0.9
1.0
1.1
Sludge Pellets (5-3-0) Required (tons/acre) to Achieve Total Ni-trogen Requirement for Differing Orchardgrass Yields (tons/acre)
Yield Goal (Tons/Acre)
Slu
dge
Pel
lets
Req
uir
ed (
To
ns/
Acr
e)
Total Amount of Nutrients Supplied at Different Rates of Granulite (5-3-0)
1 2 3 4 50
50
100
150
200
250
300
350
47
94
141
188
235
60
120
180
240
300
N P
K
Tons of Sludge Pellets Applied
LBS
of N
utri
ent S
uppl
ied
at G
iven
Rat
e
Granulite 5-3-0
Analysis Price per Ton N P KGranulite Pellets 5-3-0- 24 0.15 0.15
Liming Cost
Liming Cost
• Rule 1: Lime cost less than fertilizer.– Keep field pH in desirable ranges, especially
for alfalfa.
Cool Season Grasses: Most Legumes:Alfalfa:Annuals:
Domino’s Lime• May offer a good value compared to conventional lime.• By product of Domino Sugar refinement process located in
Baltimore , MD• Domino Lime may be obtained directly by contacting Tom Reilly,
Eastern Materials Inc. at 410 365-6839 or 410-439-1811.
2007 RatesDelivery Miles Charge/Ton Delivered 0-50 $ 5.68 51-70 $ 7.30 71-90 $ 8.92 91-110 $10.55 111-130 $12.17 131-149 $13.80 >150 $15.42 and up
Genstar Aglime Domino LimeMoisture 5.0% --CaO (calcium oxide) 51.0% 47.24%MgO (magnesium oxide) 1.0% 0.70%CaCO3 Equivalent (CCE) 93.0% 80.09%Pass 20 Mesh 98.0% 100.00%Pass 60 Mesh 80.0% 99.72%Pass 100 Mesh 56.0% 99.66%
In Summary:
UMD-AGNR Photo Archive; http://www.photos.umd.edu
In Summary: General Recommendations
• Take soil test on a regular basis.• Always split apply N regardless of source• Balance specific field fertility needs with
the crop and nutrient source• Try to avoid nutrient loss from leaching,
volatilization, etc.• Add legumes to grass stands to supply
some or all of N needs.
In Summary: Stop by and see your Nutrient Management Advisor!!!!!!
In Summary:• 1) Important to get
things in the right place– Alfalfa requires high K
• Poultry Litter, Manure– Grasses require high N
• Sludge, Manure
In Summary:• 2) Take good soil
test. Operate with good information. Do not apply nutrients you do not need.
In Summary:• 3) Explore you Options.
Manure, bio-solids, poultry litter, dehydrated sludge and fertilizer may or may not be a good fit depending upon
your operation.
“Any Questions?”
This man knows what he is smelling about! (Dr. Les Vough Pictured)
University of Maryland ExtensionBen Beale301 475 4481bbeale@umd.edu
Brian Clarkbpclark@umd.edu
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