Another key to success is the organization of round test organized by the RTC and at the attention of the laboratories in the region. In order to only compare laboratories, the cotton samples (a large mass of cotton) sent out by the RTC to the laboratories for testing should be very homogeneous. It is then required to take profit of a cotton homogenizing device to be developed first (on Cirad and CFC funding) and then copied to the 2 RTCs (paid by CFC). The user institute will then be the RTCs (with an exemplary of the machine) and the laboratories as they will be confident in the round test to adjust their results at the proper level. [.../...] Another key to success is the organization of round test organized by the RTC and at the attention of the laboratories in the region. In order to only compare laboratories, the cotton samples (a large mass of cotton) sent out by the RTC to the laboratories for testing should be very homogeneous. It is then required to take profit of a cotton homogenizing device to be developed first (on Cirad and CFC funding) and then copied to the 2 RTCs (paid by CFC). The user institute will then be the RTCs (with an exemplary of the machine) and the laboratories as they will be confident in the round test to adjust their results at the proper level [.../...].