Know more

About cookies

What is a "cookie"?

A "cookie" is a piece of information, usually small and identified by a name, which may be sent to your browser by a website you are visiting. Your web browser will store it for a period of time, and send it back to the web server each time you log on again.

Different types of cookies are placed on the sites:

  • Cookies strictly necessary for the proper functioning of the site
  • Cookies deposited by third party sites to improve the interactivity of the site, to collect statistics

Learn more about cookies and how they work

The different types of cookies used on this site

Cookies strictly necessary for the site to function

These cookies allow the main services of the site to function optimally. You can technically block them using your browser settings but your experience on the site may be degraded.

Furthermore, you have the possibility of opposing the use of audience measurement tracers strictly necessary for the functioning and current administration of the website in the cookie management window accessible via the link located in the footer of the site.

Technical cookies

Name of the cookie


Shelf life

CAS and PHP session cookies

Login credentials, session security



Saving your cookie consent choices

12 months

Audience measurement cookies (AT Internet)

Name of the cookie


Shelf life


Trace the visitor's route in order to establish visit statistics.

13 months


Store the anonymous ID of the visitor who starts the first time he visits the site

13 months


Identify the numbers (unique identifiers of a site) seen by the visitor and store the visitor's identifiers.

13 months

About the AT Internet audience measurement tool :

AT Internet's audience measurement tool Analytics is deployed on this site in order to obtain information on visitors' navigation and to improve its use.

The French data protection authority (CNIL) has granted an exemption to AT Internet's Web Analytics cookie. This tool is thus exempt from the collection of the Internet user's consent with regard to the deposit of analytics cookies. However, you can refuse the deposit of these cookies via the cookie management panel.

Good to know:

  • The data collected are not cross-checked with other processing operations
  • The deposited cookie is only used to produce anonymous statistics
  • The cookie does not allow the user's navigation on other sites to be tracked.

Third party cookies to improve the interactivity of the site

This site relies on certain services provided by third parties which allow :

  • to offer interactive content;
  • improve usability and facilitate the sharing of content on social networks;
  • view videos and animated presentations directly on our website;
  • protect form entries from robots;
  • monitor the performance of the site.

These third parties will collect and use your browsing data for their own purposes.

How to accept or reject cookies

When you start browsing an eZpublish site, the appearance of the "cookies" banner allows you to accept or refuse all the cookies we use. This banner will be displayed as long as you have not made a choice, even if you are browsing on another page of the site.

You can change your choices at any time by clicking on the "Cookie Management" link.

You can manage these cookies in your browser. Here are the procedures to follow: Firefox; Chrome; Explorer; Safari; Opera

For more information about the cookies we use, you can contact INRAE's Data Protection Officer by email at or by post at :


24, chemin de Borde Rouge -Auzeville - CS52627 31326 Castanet Tolosan cedex - France

Last update: May 2021

Menu Logo Principal

Site web of unit USRAVE - Unit Services Research Analyses Plant Environnemental

Zone de texte éditable et éditée et rééditée

Information concerning samples

USRAVE do not perform sampling at field. The analyses results produced by USRAVE is representative of the sample it received.

That is the reason why you need to care when preparing the samples to send to the laboratory. Remember that you will need to explain analytical results in the end.
You will find below a collection of 17 sampling methods (in French). Those methods were designed by researchers of INRA for research purposes. They can guide you, but are not universal and have no exhaustive character. For more information please contact us.
List of 17 protocols available:


Protocol of taking of the leaves of wheat
Read more


Protocol of taking of carrots
Read more

Cherry tree

Protocol of taking of the leaves of cherry tree
Read more

Cabbages and Salads

Protocol of taking of cabbages or salads
Read more

Foliage void (broad-leaved trees)

Protocol of taking on trees in foliage void
Read more

Persistent foliage

Protocol of taking on evergreen trees
Read more

Strawberry plants

Protocol of taking of the leaves of strawberry plants
Read more

Fruiterers with kernels

Protocol of taking of the leaves of fruit trees with kernels
Read more

Pome fruiterers

Protocol of taking of the leaves of pome fruit trees
Read more

Fruits (apples, pears)

Protocol of taking of fruits: apples, pears
Read more


Protocol of taking of the leaves of kiwi
Read more


Protocol of taking of the leaves of Corn
Read more


Protocol of taking of the leaves of olive tree
Read more

Petiole of vines

Protocol of taking of petiole of vines
Read more


Protocol of taking of the leaves of poplar
Read more


Protocol of taking of needles on conifer
Read more


Protocol of taking of vine leaves
Read more