this segment will demonstrate the
procedure for taking a liquid dip sampling the manure prior to application
will ensure that you receive the analysis in time to adjust nutrient application
rates based on the nutrient concentration of the manure be sure to label sample bottles before
filling them with the manure sample, a few pieces of
equipment are needed for manure sampling first rubber gloves to protect yourself a
bucket to mix subsamples from different locations in the pit a funnel to pour the final mix sample
into the labeled sample bottle and a dip
sampler this sampler was made using a long piece
of one by two and Cup securely taped to the end when
getting a sample you need to have access to the pit often
through the pump out ports once the port is open break through the
crust that may have formed on the surface and stir in one area to obtain uniform
sample taking one sample is similar to taking
one soil core when soil sampling so it is necessary to
take three subsamples from within each pump out port after three subsamples have been taken
from one port move on to all remaining ports and access locations repeating the
process of mixing and taking three subsamples after subsamples are collected stir or
swirl the bucket to mix the subsamples using the funnel pour the mix sample into the bottle until
the bottle is about three fourths full the sample may be frozen before sending
to the lab so the extra space is needed for
expansion the sample should be frozen immediately and shipped frozen on a Monday or
Tuesday so it arrives at the lab for analysis during the week and not during the
weekend this method will adequately reflect the nitrogen content
of the pit but will not be a good representation of the phosphorus
concentration in the manure source as phosphorus tends to be found in the
solids that can settle to the bottom of the storage structure another way to take a liquid manure
sample is to use a core sampler the core
sampler allows you to obtain a sample that best represents the manure from top to bottom throughout the pit
capturing any stratification especially with
phosphorous, the sampler is made using inch-and-a-half PVC pipe with a tennis
ball attached to a rope that plugs the end after taking a sample
there are commercial samplers that can be used also to take a sample release the plug and run the pipe down into the manure
all the way to the bottom then pulled the plug tight you should
only sample from the solids at the bottom of the storage structure if in fact those solids will be
completely agitated and removed from the structure take
sampler over to the sample bucket and release the plug emptying the sample
into the bucket taking one sample is similar to taking
one soil core when soil sampling so it is necessary to take sub samples
from at least three locations from within each pump out port after three subsamples have been taken
from one port move on to all remaining ports and
access locations repeating the process mixing and taking
three subsamples after samples are collected stir or swirl the bucket around to mix up
samples next using the funnel pour the next sample into the label bottle until the bottle is
about three forceful the sample may be frozen before sending
to the lab so the extra space is needed for
expansion the sample should be frozen immediately and shipped frozen on Monday or Tuesday
so it arrives at the lab for analysis during the week and not during the weekend