*3.6. Root Mass Distribution*

There is no significant total root mass difference between plants in the T30 and Tcontrol treatments. However, plants in the T30 and Tcontrol treatments had lower mean total root weights compared to plants in the T60 and T90 treatments. The mean total root mass for plants in the T90 treatment was always two-fold that for Tcontrol. A relatively lower dry root mass was measured at the second and third layers of Tcontrol, T30, and T60 but a higher dry root mass was found at the second and third layers of T90. Similar to the results of the grain yield, the plant height, total biomass, pod weight, and WUE, the best root mass results were obtained from T90. Fidantemiz et al. [13] found similar results for the T90 treatment. Their results also showed the inverse relationship between the WTD and root mass distribution.
