Following a proper sampling scheme that enables you identifying the number of samples to take and
where they should be located is defined, it is important to consider the below field work preparations and actual sampling steps:
1. Preparation for field work:
It is important to consider the following points before commencing fieldwork:
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Proper preparation before going to the field is critical to ensure a successful field sampling campaign, and for the safety and well-being of the field team. Prior to any field campaign, it is important to have a good understanding of the area to be surveyed, including its topography,climate and vegetation characteristics, accessibility,and its security situation.
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Collate existing information about the area to be surveyed including:maps (topographical,geological,soils and/or vegetation),satellite images and/or historical aerial photographs
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Trainstaff and pilotall procedures
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Prepare logistics in terms of transport, local guides,interpreters,accommodation (if needed).
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Inform local government officers and community leaders about your activities and obtain permission from the land owner(s) to sample a given area,making sure that that all parties understand what you are doing.
2. Collecting field samples
Details of the procedures are given here (LDSF)
if the Land Degradation Surveillance Framework (LDSF),
which is used in the African Soil Information Services (AfSIS) is followed. In summary the process involves:
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Locate the predetermined sample location
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Take composite soil samples using an auger from the four sub plots in the plot.
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Measure soil bulk density down the profile (if using cumulative mass datum) from the center subplot.
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Collect any associated data required.
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Record all data on prepared data collection forms or suitably programmed data capture devices (eg GPS).
See the land degradation surveillance framework
(LDSF) for the field guide sampling protocol.
