According to J. Evans et al Chickpea is a symbiotically-dependent plant in which nodule mass and rates of nitrogenase activity increased when vegetative growth increased rapidly, but declined during fruiting. The specific activity of nodules declined as their mass rapidly increased. Nodule mass and rates of nitrogenase activity varied between genotypes, as did the point of maximum activity, which in some genotypes occurred before fruit growth dominated shoot growth. Current N₂-fixation supplied most of the nitrogen for pod and seed growth, but in some genotypes mobilization of nitrogen from vegetative parts was evident. Seed attracted up to 50% of assimilated nitrogen; residual nitrogen was contained mainly in leaf and pod tissue, though in one genotype stem nitrogen was plentiful.
J. Evans et al, Symbiosis, Nitrogen and Dry Matter Distribution in Chickpea (Cicer arietinum),Experimental Agriculture (1982), 18:339-351.Link

The root nodules of soybeans, chickpea and some other legumes are formed by small-celled rhizobia termed Bradyrhizobium. Nodules on some tropical leguminous plants are formed by yet other genera. In all cases the bacteria "invade" the plant and cause the formation of a nodule by inducing localised proliferation of the plant host cells. Yet the bacteria always remain separated from the host cytoplasm by being enclosed in a membrane - a necessary feature in symbioses. Link

1)Research at many Research Institutes has provided a bid number of stress tolerant cultivars.Like ICARADA has provide cold tolerant, Ascochyta Blight resistane Chickpea germplasm and cultivars suited for extented cultivation in the Mediterranean Basin and elsewhere.

2)There are more than 75 species which have been reported to infest Chickpea fields in the Mediterranean region.Grass weeds can be controlled by Aryloxyphenoxypropanoate herbicides in postemergence, but broaded weeds are more difficult to control at this stage.

3)since 1990, pyridate found to be one of the most effective postemergence herbicide for use with this crop.This herbicide binds to the plastoquinone- binding DI protein of photosystemII, inhibiting photosyntheic electron transport. After penetration pyridate is rapidly hydrolyzed in the plant giving CL96673(6-chloro-3-phenylpyridazine-4-ol).