According to the official notification, "Ranks are allotted first to all successful candidates qualifying for Junior Research Fellowship as per the merit list of JRF and then the candidates are distributed between CSIR and UGC in the ratio of number of fellowships shared between these two for each subject except Bachelor's degree holder's who are allocated to CSIR."
Moreover, CSIR has also declared the minimum cut-off for Junior Research Fellowship (NET) and eligibility for Lecturership for each reservation category.
All the candidates can check the cut-off list at http://csirhrdg.res.in/cutoff_Jun2017.pdf
CSIR stands for Council of Scientific and Industrial Research. It is a premier national R & D organisation and is among the world's largest publicly funded R&D organisation. CSIR conducts the Joint CSIR UGC NET, which is a national level entrance examination in the field of Science including Life Sciences, Physical Sciences, Chemical Sciences, Mathematical Sciences and Earth Atmospheric Ocean and Planetary Sciences.