Sampling
LKVSample shipment

Feedstuff sampling

Sampling from the gate of a silo

  • Several subsamples (size about 50 - 200 g) must be taken.
  • These are combined, thoroughly mixed, and then separated again into several homogeneous subsamples.
  • One or more subsamples constitute the final sample, which is sent for analysis (0.5 to 1 kg).
  • The base area of the silo must be divided into 4 to 9 fields. A partial sample must be taken from each field. The following figure shows the sampling grid for the base area or gate area of a silo (small silo on the left, large silo on the right).

  • If the gate area is inhomogeneous (e.g. different layers, several types of forage in the case of sandwich silages), partial samples should be taken from each layer. When combining the subsamples to form the final sample, make sure that the quantitative proportions correspond to the situation in the silo stock.

Sampling of the TMR at the feed table

  • Sampling (TMR) on the feed table must be done during or immediately after presentation of the ration.
  • When sampling after feed presentation, the feed table must be divided into 3 - 5 sections depending on its length. A partial sample (2 - 5 kg) must be taken from the middle of the sections. It is important that the sample is taken over the entire vertical (ô), as the components of a mixed ration tend to sediment (segregate). Taking subsamples only from the top of the ration can lead to significant errors, even if a large number of subsamples have been taken across the feed table (horizontal). Usually, the use of a shovel is suitable for taking such large subsamples. The final sample is drawn from the subsamples by means of a dividing cross, which is sent for analysis (0.5 to 1 kg).

Sampling Hay

  • Take hay samples only after a storage period of 8 - 12 weeks
  • When the round bale is open, leave out the edge layers. Take at least 5 individual samples from all layers from the outside to the inside.
  • For opened square bales take from one side to other side at least 5 single samples 
  • If hay bales are closed, make two punctures with a borer stick from opposite sides centered to the core so that all layers are covered.

 

Consulting and attestation

for chemical feedstuff analyses

+49 37206 87-140
luw@lks-mbh.com

Water sampling

Requirement

  • sterile bottle for microbiological examination
  • (un)sterile bottle is sufficient for chemical examination
  • send water samples as quick as possible and cooled to the laboratory 
  • sterile bottles are provided by our laboratory free of charge. Please feel free to order them from Mrs. Wolfram or Mr. Leibner.

Procedure

  1. remove seals and strainers
  2. discard about 1 liter of water
  3. at constant temperature filling of the chemical sample ((un)sterile bottle)
  4. flaming or disinfection of the sampling point
  5. Collection of the microbiological sample (sterile bottle)

Livestock water sampling

Please do not take the drinking water sample directly from the drinking basin, but from the discharge point beforehand. A sample from the drinking basin will falsify the results, as bacterial growth is favored by adhering saliva and feed residues.

Note

Drinking water samples may only be taken by accredited samplers. For drinking water sampling, please contact Ms. Wolfram. 

 

Jacqueline Wolfram

Manager microbiology, veterinary diagnostics and foodstuff

technical manager LKS & LKV

deputy manager milk laboratory

+49 37206 87-187
jacqueline.wolfram@lks-mbh.com

Soil sampling

Sampling instructions for the determination of the basic nutrients in soil

In addition to soil analysis in the laboratory, conscientious and representative sampling is fundamental for a meaningful test result. Sampling should be done every 3-6 years, depending on the intensity of use, befor mineral and organic fertilization

The soil samples for Nmin-analysis could not used for the determination of the basic nutrients, the lime content and the micronutrients. 

The sampling time should always be to the same season under similar conditions during the frost-free period. The field must be dry and walkable. The soil should not be too wet and not dried out, so that the sampling stick can penetrate to the required extraction depth and the sampling stick fills evenly.

To determine the basic nutrients (P, K, Mg), lime content (pH) and micronutrients, take soil samples from the depth of 0 - 20 cm on crop land and 0 - 10 cm on grassland (main rooting area).

Per field at least take one sample, big fields should be shared.  The sampling grid should not be bigger then 10 ha. In the case of strong soil differences and different previous crops or different cultivation (especially organic fertilization), differentiated sampling should be carried out according to the area proportions.

Take the samples evenly on the area  along a diagonal line or along a Zigzag line with ca. 20 punctures/sample for crop land and ca. 40 punctures/sample for grass land. Edge strips and headlands shall be excluded from sampling.

The sample stick had to be punctured the soil vertical, to be rotate and carefully pulled out (complete preservation of the sample in the sampling stick). The sample is to be transferred in a collection vessel, the single samples should be mixed and put in a plastic bag (ca. 300 g). Please close the bag securely and marke with a smudge-proof pencil. Per sample one seperate sample number must be assigned.

Please fill out the order form carefully.

Dr. David Tokarski

Manager sample acceptance and attestation/Consultant for soil fertility and plant nutrition
+49 37206 87-194
david.tokarski@lks-mbh.com

Susanne Beer

deputy manager sample acceptance and attestation
+49 37206 87-184
susanne.beer@lks-mbh.com

Sampling plant analysis

Sampling instructions for plant analysis

The following principles must be observed by taking samples for plant analyses:

  • For every field resp. every part of the field one representiv sample is to be submitted. Untypically places should not be part of the sampling.
  •  At least should be taken 500 g plant material from different places of the field (at least 20) along a diagonal line or along a Zigzag line.
  • The plants must be sent in without roots and pollution. 
  • The sampling should not carry out direct after fertilization.
Plant speciesPlant organDevelopment stages (BBCH)
all grain speciesentire overground planttillering to spike and panicle swells 
Silo corn middle leaves40 – 60 cm
middle leavespanicle pushing 
cob leavesbloom
winter rapejust fully developed leavesbud little (53) – bloom (64)
potato just fully developed leavesbud stade – tuber formation
sugar beetjust fully developed leavesmiddle: June, end: June, July, August
fodder beetleaf blade of just fully developed leavesend: June, July
peaentire overground plant30 – 40 cm, start of bloom
broad beanentire overground plantstart of bloom
alfalfa sprout from 1st growthbud stade, start of bloom, bloom
red cloversprout ca. 10 – 15 cm over the groundbud stade, start of bloom, bloom
meadow and pasture grassessprout from 1st growthstart of bloom
linseedentire upper third of sproutbudding - start of bloom
sunflowerupper fully developed leavesstart of bloom
Source based on: Umsetzung der Düngeverordnung; LfL 2007

 

Dr. David Tokarski

Manager sample acceptance and attestation/Consultant for soil fertility and plant nutrition
+49 37206 87-194
david.tokarski@lks-mbh.com

Dr. Wolfram Richardt

Head of laboratories
+49 37206 87-138
wolfram.richardt@lks-mbh.com

Sampling Pre-harvest-analysis grain as foodstuff

Sample instructions for Pre-harvest-analysis of grain

Grain, that should be placed on the market as a foodstuff, may according to VO 1881/2006 (Verordnung zur Festsetzung der Höchstgehalte für bestimmte Kontaminanten in Lebensmitteln) not exceed the level of lead and cadmium. With the pre-harvest-analysis can be assessed, whether an exceedance of the maximum level for foodstuff is to be expected. The sampling is possible from the dough stage (EC85). In this way, the producer fulfills his obligation for self-monitoring in accordance with foodstuff law.

The sampling could carry out from the farmer or from a commissioned person. Please note that complete grain ears must be cutted and sent in the laboratory. With single grain corns no intentional pre-harvest-analysis could take place.

The collective sample must be kept cool and sent in laboratory within 2 days. Togehter with the sample should for an definite allocation following informations delivered:

  • Fruit species and variety
  • Information on the traceability of the samples (field name, parcel, field number, field part)
  • sampling date
  • sampler

Raina Wein

Feedstuff and soil laboratory

technical-scientific manager
+49 37206 87-198
raina.wein@lks-mbh.com

Dr. Wolfram Richardt

Head of laboratories
+49 37206 87-138
wolfram.richardt@lks-mbh.com

An representiv sampling is the basis to an professional analysis and for an meaningful analysis result. Therefore we give you on this website instructions and notes for an expertly sampling.