Know more

Our use of cookies

Cookies are a set of data stored on a user’s device when the user browses a web site. The data is in a file containing an ID number, the name of the server which deposited it and, in some cases, an expiry date. We use cookies to record information about your visit, language of preference, and other parameters on the site in order to optimise your next visit and make the site even more useful to you.

To improve your experience, we use cookies to store certain browsing information and provide secure navigation, and to collect statistics with a view to improve the site’s features. For a complete list of the cookies we use, download “Ghostery”, a free plug-in for browsers which can detect, and, in some cases, block cookies.

Ghostery is available here for free:

You can also visit the CNIL web site for instructions on how to configure your browser to manage cookie storage on your device.

In the case of third-party advertising cookies, you can also visit the following site:, offered by digital advertising professionals within the European Digital Advertising Alliance (EDAA). From the site, you can deny or accept the cookies used by advertising professionals who are members.

It is also possible to block certain third-party cookies directly via publishers:

Cookie type

Means of blocking

Analytical and performance cookies

Google Analytics

Targeted advertising cookies


The following types of cookies may be used on our websites:

Mandatory cookies

Functional cookies

Social media and advertising cookies

These cookies are needed to ensure the proper functioning of the site and cannot be disabled. They help ensure a secure connection and the basic availability of our website.

These cookies allow us to analyse site use in order to measure and optimise performance. They allow us to store your sign-in information and display the different components of our website in a more coherent way.

These cookies are used by advertising agencies such as Google and by social media sites such as LinkedIn and Facebook. Among other things, they allow pages to be shared on social media, the posting of comments, and the publication (on our site or elsewhere) of ads that reflect your centres of interest.

Our EZPublish content management system (CMS) uses CAS and PHP session cookies and the New Relic cookie for monitoring purposes (IP, response times).

These cookies are deleted at the end of the browsing session (when you log off or close your browser window)

Our EZPublish content management system (CMS) uses the XiTi cookie to measure traffic. Our service provider is AT Internet. This company stores data (IPs, date and time of access, length of the visit and pages viewed) for six months.

Our EZPublish content management system (CMS) does not use this type of cookie.

For more information about the cookies we use, contact INRA’s Data Protection Officer by email at or by post at:

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

Dernière mise à jour : Mai 2018

Menu Logo Principal logo SOERE PRO Logo CIRAD Logo AnaEE Logo IRD Logo Ouagadougou university

Home page

Gampela - Burkina Faso

Gampela is one of the historical sites associated to SOERE PRO manage in a tropical context

Gampela has been initiated in 2007

The objectives of Gampela device is to evaluate the effect of repeated inputs of different urban OWPs on sorghum crops and soil properties, by making two modes of OWP inputs.


This site is an experimental device composed of 3 blocks in divided parcels (9 m²) on which are studied the effects of repeated inputs of 6 urban composts with variable compositions, according to their mode of application (located at the plant level (or zaï technique) or on the entire plot).


Figure : Technique of compost localized application, zaï practice (Hien, Masse)

The 14 treatments are:

  • Mixed composted waste : slaughterhouse (60 %) and green waste (40 %) (C1) - localized / spread
  • Mixed composted waste : slaughterhouse (40 %), cooked (20 %) and green waste (40 %) (C2) - localized / spread
  • Mixed composted waste : slaughterhouse (30 %), cooked (30 %) and green waste (40 %) (C3) - localized / spread
  • Mixed composted waste : slaughterhouse (20 %), cooked (40 %) and green waste (40 %) (C4) - localized / spread
  • Mixed composted waste : cooked (60 %) and green waste (40 %) (C5) - localized / spread
  • Composted green waste (100 %) (C6) - localized / spread
  • Control: non compost (T)

Figure : Plan of the Gampela experimental device  (Hien, Masse)

Site management

The site is cultivated in sorghum monoculture. Compost inputs are manually done with 3 t.ha-1 of dry matter per year, slightly buried or covered with soil at the beginning of the rainy season. Tillage is done manually, with annual sowing in July and manual control of weeds


Figure :  Sorghum culture on Gampela (Hien, Masse)

Pedo-climatic context

The soil is a ferric lixisol type. The initial state of the layer 0-20 cm is:

  • Apparent density : 1.5
  • Organic carbon content : 3
  • Total phosphorus content : 0,2 ; Olsen phosphorus content < 0,01
  • Water pH : 5.3
  • Climate type : Sudano-Sahelian with 2 contracted seasons
  • Average annual temperature: 28.2 ° C
  • Average annual rainfall: 789 mm


The site is managed with a partnership IRD - UMR Eco & Sol and the University of Ouagadougou.


See next => SOERE PRO Senegal