Presentation by Bill BrogdenBrogden · Presentation by Bill BrogdenBrogden Establishing the need to...
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Presentation by Bill Presentation by Bill Brogden Brogden Establishing the need to correct a fields pH Establishing the need to correct a fields pH Effect of low pH on other nutrients Effect of low pH on other nutrients Lime quality and effectiveness Lime quality and effectiveness ESTABLISH THE NEED TO ESTABLISH THE NEED TO CORRECT FIELD pH CORRECT FIELD pH CONSIDER Ph EARLY CONSIDER Ph EARLY TYPE OF TEST TYPE OF TEST SPOT CHECK SPOT CHECK ESTABLISH A ROTATION ESTABLISH A ROTATION
Transcript of Presentation by Bill BrogdenBrogden · Presentation by Bill BrogdenBrogden Establishing the need to...
Presentation by BillPresentation by Bill BrogdenBrogden
Establishing the need to correct a fields pHEstablishing the need to correct a fields pH
Effect of low pH on other nutrientsEffect of low pH on other nutrients
Lime quality and effectivenessLime quality and effectiveness
ESTABLISH THE NEED TOESTABLISH THE NEED TOCORRECT FIELD pHCORRECT FIELD pH
CONSIDER Ph EARLYCONSIDER Ph EARLY
TYPE OF TESTTYPE OF TEST
SPOT CHECKSPOT CHECK
ESTABLISH A ROTATIONESTABLISH A ROTATION
Factors that influence theFactors that influence thedecline of soil pHdecline of soil pH
LEACHINGLEACHING
CROPPINGCROPPING
FERTILISINGFERTILISING
POLLUTIONPOLLUTION
OTHER NUTRIENTSOTHER NUTRIENTS
pH rangepH range
pH EFFECT ON NUTRIENTSpH EFFECT ON NUTRIENTS
FERTILISERFERTILISER pH4.5pH4.5 pH5.0pH5.0 pH5.5pH5.5 pH6.0pH6.0 pH7.0pH7.0
NITROGENNITROGEN 30%30% 43%43% 77%77% 89%89% 100%100%
PHOSPHATEPHOSPHATE 23%23% 31%31% 48%48% 52%52% 100%100%
POTASHPOTASH 33%33% 52%52% 77%77% 100%100% 100%100%
pH effect on annual fertilizer spendpH effect on annual fertilizer spend
Total annual lossTotal annual loss
pH 5.0pH 5.0--6.06.0 for wheat landfor wheat land
58%58%--13%13% EurosEuros
pH 5.0pH 5.0--6.06.0 for grazing seasonfor grazing season
57%57%--12% Euros12% Euros
pH 5.0pH 5.0--6.06.0 for 2 cuts of silagefor 2 cuts of silage
58%58%--13% Euros13% Euros
Lime productsLime products
Ground LimestoneGround LimestoneTNV (TNV (CaCoCaCoзз) min 90%) min 90%
Sieve sizeSieve size100% Pass 3.35mm100% Pass 3.35mm35% Pass 0.150mm35% Pass 0.150mm
Moisture not more than 3%Moisture not more than 3%
Liming materialsLiming materialsTNVTNV
Sieve sizeSieve size
Historical DevelopmentHistorical Development
Assumptions in 1973Assumptions in 1973
Large particles ineffectiveLarge particles ineffective
Only smallest particles 100% effectiveOnly smallest particles 100% effective
> 5mm 0% effective
2 – 5 mm 10% effective
0.25 - 2 mm 40% effective
<0.25 mm 100% effective
Mississippi State UniversityMississippi State UniversityMethodMethod
60 mesh sieve < 0.25mm 100% effective60 mesh sieve < 0.25mm 100% effective
0.25mm0.25mm-- 2mm2mm --50% effective50% effective
10 mesh sieve > 2mm10 mesh sieve > 2mm -- 0% effective0% effective
Coming up to dateComing up to date
Practical work found smaller particles evenPractical work found smaller particles evenmore effective.more effective.
Experiments with lime <0.075mm found thatExperiments with lime <0.075mm found thateffectiveness increased exponentially aseffectiveness increased exponentially asthe mean diameter decreased.the mean diameter decreased.
table for physical effectiveness.
SizeSize
InIn
mmmm
<0.0<0.07575
0.0750.075 ––0.150.15
0.150.15––0.250.25
0.250.25–– 0.50.5
0.50.5 ––1.01.0
1.01.0 ––2.02.0
PhysicalPhysicalEffectiveEffectiveness %ness %
100100 5858 5252 4747 3434 99
1-2
0.5-1.0
2.5-0.5
0.15-0.25
0.75-0.15
0.075
Lime particle action in soil
91%
66%
53%
48%
42%
0%
Lime particle action in soil
1-2
0.5-1
0.25-0.5
0.15-0.25
0.075-0.15
0.075
Chalk particle Limestone particleChalk particle Limestone particle
ConclusionConclusion
The quality of Lime applied should always be the best itThe quality of Lime applied should always be the best itcan be. Lime can be shown to be a very important input forcan be. Lime can be shown to be a very important input forprofitable Farming and should not be over looked.profitable Farming and should not be over looked.
It can greatly help with the utilisation of Fertilizer and FarmIt can greatly help with the utilisation of Fertilizer and FarmWaste as sources of cost effective plant food.Waste as sources of cost effective plant food.
Ireland needs to increase the amount of lime it applies if itIreland needs to increase the amount of lime it applies if itwishes to remain a successful Agricultural economy.wishes to remain a successful Agricultural economy.In these difficult times Lime needs to be in the thoughts ofIn these difficult times Lime needs to be in the thoughts ofall those making a living from Farming.all those making a living from Farming.
