Manure Management Manure Management in Precision Farmingin Precision Farming

Yan TangPlant and Soil Sciences

Manure as soil resourceManure as soil resource

Nutrient values Soil amendment Crop quality Reduce commercial fertilizer

Nutrient valuesNutrient values

Elements: Primary Nutrients: N, P, K

Secondary Nutrients: Ca, Mg, SMicronutrients: Zn, Fe, Cu, Mn, B, Mo, Cl

Availability

Soil amendmentSoil amendment

Chemical Properties Physical Properties Biological Porperites

Crop QualityCrop Quality

Reduce commercial fertilizerReduce commercial fertilizer

ProblemsProblems

Difficult in application Environmental Issues

Difficult in applicationDifficult in application

Bulky Transportation cost Odor

Environmental issuesEnvironmental issues

Nitrogen pollution Phosphorus pollution Other pollutants

Manure precision Manure precision management approachmanagement approach

Research trends Best management practices

Research TrendsResearch Trends

Crop nutrients conservation Environment conservation

Best management practiceBest management practice(site-specific)(site-specific)

Manure factors Plant and soil factors Other factors

Manure factorsManure factors1.1.Manure sampling and analysisManure sampling and analysis

2.2.  Nitrogen or phosphorus application strategies Nitrogen or phosphorus application strategies

3.3.  Spatial variabilitySpatial variability

4.4.    Manure amendmentsManure amendments

5.5.    Manure transportationManure transportation

6.6.    Manure processingManure processing

Soil and plant factorsSoil and plant factors

Soil properties

Plant requirements

Other factorsOther factors

Climate Topography Application methods Economy

Technologies in Technologies in precision manure precision manure

managementmanagement

Database GIS GPS VRT technologies

Site-specific Liquid Manure Site-specific Liquid Manure ApplicationApplication

Measurement Control Documentation

Determing Application RateDeterming Application Rate

Load Cell Methods

Flow Meter Methods

Load cell methodsLoad cell methods Typically consist of load cells mounted under the

manure “container” on an applicatior. Laod cells can provide static and continouse stream of weight data during applicatio discharge.

Measured wighty differences dring unloasing can be used to determine applicator discharge rate.

Work with both solid material application equipment.

Static accuracy ratings : 99.5 % Error: Ground surface roughness and movement

of liquid manure (2-8 percent)

A manure applicator equipped A manure applicator equipped with load cellswith load cells

D. EssD. Ess

Flow sensing systemsFlow sensing systems

Tyopically use electromagnetic flow meters. Expensive Handleliquids with a wide range and type of

solids content Measuing less than 0.5 percent Not influenced by travel Fange-mounted into transfer tubes on

tanker applicators that sue slurry pumps

Electromagnetic flow meter installed Electromagnetic flow meter installed on a manure applicatoron a manure applicator

D. EssD. Ess

ConclusionConclusion

Manure management is important in precision farming

Manure management in precision is a relative concept

Manure management in precision farming become feasible as technologies develops such as GIS and GPS and other VRT technologies

References:References:

•http://mollisol.agry.purdue.edu/SSMC

•http://clay.agr.okstate.edu/animalwaste

•Animal waste utilization: Effective use of Manure as a Soil Resouce, Animal waste utilization: Effective use of Manure as a Soil Resouce, Edited by Hatfiedld J.L &B.A.Stewart, Ann Arbor Press,1998Edited by Hatfiedld J.L &B.A.Stewart, Ann Arbor Press,1998

•http://res2.agr.ca/initiatives/manurenet/manurenet_en.html

Question? Question?

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