Difference between revisions of "Composite sampling by zone protocol"

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The goal of this protocol is to organize the process to create zones for a particular field within a farm and use them to plan and carry out field sampling by zones.  
 
The goal of this protocol is to organize the process to create zones for a particular field within a farm and use them to plan and carry out field sampling by zones.  
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*Region:South africa
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*Contributors: Oasis Consulting, Avison Fertilizers.
  
 
== Create management zones  ==
 
== Create management zones  ==
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*'''Other aspects''', such as topography, expected season weather, etc.
 
*'''Other aspects''', such as topography, expected season weather, etc.
  
<br>
 
  
This how-to guide shows the steps for carrying it out: ..... '''//REFERENCE to Mike's Article'''
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'''[[How_to_create_management_zones_based_on_a_productivity_map|This guide]]''' shows the steps for carrying it out.  
  
<br>
 
 
'''//REMOVE LIST'''
 
 
#'''[[How to download services in 360|Download productivity maps]]''': If you are working with our [[:Category:Precision farming cycle|Precision farming cycle]] or have ordered our [[Productivity Maps|Productivity maps]], you may download them as shown in the linked guide.
 
#'''[[Restore Backup|Restore your productivity maps into GeoAgro GIS]]'''
 
#'''[[How to create a management zone layer in GeoAgro GIS|Create a layer for your management zones]]''': this layer will import data from your productivity maps which will be used as a basis for creating your management zones.
 
#'''[[How to group zones in GeoAgro GIS|Group your productivity zones into management zones]]''': Productivity zones need to be grouped into simpler, easier to manage zones. The linked article will provide you with the steps for doing it, as well as some useful criteria.
 
 
<br>
 
  
 
The figure below is an example of management zones created, based on a productivity map  
 
The figure below is an example of management zones created, based on a productivity map  
  
'''//PUT FIGURE'''
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{| cellspacing="1" cellpadding="5" border="0" align="center"
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|-
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| align="center" | Productivity map
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| align="center" | Management Zones
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|-
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| [[Image:How to create management zones based on PM 11.JPG|350px|How to create management zones based on PM 11.JPG]]
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| [[Image:How to create management zones based on PM 10.JPG|350px|How to create management zones based on PM 10.JPG]]
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|}
  
 
<br>  
 
<br>  
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This layer will be used to plan your sampling, as shown in the next step.  
 
This layer will be used to plan your sampling, as shown in the next step.  
  
<br>  
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<br>
  
 
== Define Grid sampling points  ==
 
== Define Grid sampling points  ==
  
Next, define a Grid of Sampling points, following these instructions: '''//put link TO GRID SAMPLING ARTICLE,&nbsp;'''
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Next, define a grid of sampling points, following '''[[Grid_points|these instructions]]'''.
 
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'''//put figure'''
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+
  
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#[[Create vector layer|Create your points layer]], where you will generate your sampling locations. '''Make sure you create your sampling layer with a structure "Field sampling", this way, later on you will be able to import them into 360'''.
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#Create a grid of sampling points using the '''[[Grid_points|grid tool]]''' for your entire field. Make sure you number them to simplify locating them in the field.<!--<br>[[Image:Zoning and sampling in South Africa protocol_01.jpg]]<br>-->
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#To print out a map with the zones and points to use as field support, use the '''[[Print|print tool]]'''. Also, in order to print a full screen map, use the option '''[http://www.wikiagro.com/en/Print#Save Save map only]'''.<br>[[Image:Zoning and sampling in South Africa protocol_2.jpg|400px]]
  
 
== Take composite samples by zone in the field, then send them to the lab  ==
 
== Take composite samples by zone in the field, then send them to the lab  ==
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It's now time to go to the field and take your samples.  
 
It's now time to go to the field and take your samples.  
  
You can take them using a GPS device, following these steps:
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You can take them using a GPS device, following these steps:  
  
 
#'''Prepare your GPS''' for your field visit  
 
#'''Prepare your GPS''' for your field visit  
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##*[[Connect to the GPS device|How to use real time navigation with your GPS device and GeoAgro GIS]]  
 
##*[[Connect to the GPS device|How to use real time navigation with your GPS device and GeoAgro GIS]]  
 
##[[Upload objects to the GPS device|Upload your grid sampling points to your GPS device]]: you can now send the grid points for your management zones to your GPS device, and take them to the field.  
 
##[[Upload objects to the GPS device|Upload your grid sampling points to your GPS device]]: you can now send the grid points for your management zones to your GPS device, and take them to the field.  
#'''Go to the field'''  
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#'''Go to the field''' and Use the GPS points in your GPS device to go to the predefined locations''''''<br>''' ''  
##Use the GPS points in your GPS device to '''go to the predefined locations'''  
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#'''Take your samples in each location''', combining samples within each zone into a single composite sample
##Take your samples in each location  
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#'''Send your samples to the lab''', numbering them to correspond each zone
#'''Send your samples to the lab'''
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<!--[[Image:Zoning and sampling in South Africa protocol 3.jpg]]-->
  
'''//MIKE, cdo este la guia de goto ponemos la opcion con GNote'''
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<!--'''//MIKE, cdo este la guia de goto ponemos la opcion con GNote como alternativa a 1. y 2''' -->
  
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== Receive lab results and specify recommendations by zone  ==
  
== Receive lab results and specify recommendations by zone ==
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In this step, lab results per sample are received: <!--[[Image:Zoning and sampling in South Africa protocol 4.jpg]]-->
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[[Image:Lab results.png|600px|Lab results.png]]
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<br>
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Based on the lab results, the agronomist analyzes the nutrient and chemical corrections requirements by zone, and available products in the region. As a result, a specific recommendation by field/zone is determined, as illustrated int the following figure. <!--[[Image:Zoning and sampling in South Africa protocol 5.jpg]]-->
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[[Image:Fertilizer reqs.png|600px|Fertilizer reqs.png]]<br>
  
== Characterize zones  ==
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This will be used in the creation of prescription maps to send to the application machine.
  
[[Category:Protocols]]
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[[Category:Protocols]] [[Category:Featured]]

Latest revision as of 06:56, 17 May 2014

The goal of this protocol is to organize the process to create zones for a particular field within a farm and use them to plan and carry out field sampling by zones.

  • Region:South africa
  • Contributors: Oasis Consulting, Avison Fertilizers.

Create management zones

The first step is to create your management/sampling zones, based on your Productivity maps. Some considerations are: 

  • Number of zones: having too many types of zones on the same field might make the field work more complicated, for instance, 3 to 5 zones could be manageable.
  • Zone limits: when going through the field visit, take into account and analyze where a zone transitions into a different zone, and whether it's a gradual or sudden process.
  • Historic crop behavior in each different productivity zone.
  • Operational conditions that may impact in your zone management (e.g.: if there's machinery available which can manage microzones)
  • Other aspects, such as topography, expected season weather, etc.


This guide shows the steps for carrying it out.


The figure below is an example of management zones created, based on a productivity map

Productivity map Management Zones
How to create management zones based on PM 11.JPG How to create management zones based on PM 10.JPG


This layer will be used to plan your sampling, as shown in the next step.


Define Grid sampling points

Next, define a grid of sampling points, following these instructions.

  1. Create your points layer, where you will generate your sampling locations. Make sure you create your sampling layer with a structure "Field sampling", this way, later on you will be able to import them into 360.
  2. Create a grid of sampling points using the grid tool for your entire field. Make sure you number them to simplify locating them in the field.
  3. To print out a map with the zones and points to use as field support, use the print tool. Also, in order to print a full screen map, use the option Save map only.
    Zoning and sampling in South Africa protocol 2.jpg

Take composite samples by zone in the field, then send them to the lab

It's now time to go to the field and take your samples.

You can take them using a GPS device, following these steps:

  1. Prepare your GPS for your field visit
    1. Connect your GPS to GeoAgro GIS: you need this to transfer your grid points from the previous step to your GPS device and use them in your sampling. These articles will help you with this:
    2. Upload your grid sampling points to your GPS device: you can now send the grid points for your management zones to your GPS device, and take them to the field.
  2. Go to the field and Use the GPS points in your GPS device to go to the predefined locations'
  3. Take your samples in each location, combining samples within each zone into a single composite sample
  4. Send your samples to the lab, numbering them to correspond each zone


Receive lab results and specify recommendations by zone

In this step, lab results per sample are received:

Lab results.png


Based on the lab results, the agronomist analyzes the nutrient and chemical corrections requirements by zone, and available products in the region. As a result, a specific recommendation by field/zone is determined, as illustrated int the following figure.

Fertilizer reqs.png

This will be used in the creation of prescription maps to send to the application machine.