Abstract
A field experiment was carried out at the second agricultural research and experiment station of the College of Agriculture, Muthanna University, for the 2019-2020 agricultural season, with the randomized complete block design RCBD, using two factors and three repeats, that’s to study the effect of adding the bio inoculant from Bacillus megaterium bacteria, and when loaded the bacterium with the immobilization inoculation technology on zeolite, sodium alginate, Agarose and bentonite and it’s symboled of M0, M1, M2 and M3 respectively to compare its efficiency in increasing potassium available and growth of wheat plant variety Eba’a 99. The experiment included two comparison treatments, the first being B0 without the addition of the bacterial inoculant and the second comparative treatment being B1 adding the bacterial vaccine. At the end of the experiment, potassium concentration was estimated in soil after cultivation. The results showed a clear moral effect of the use of the immobilized bacterial inoculant in Nitrogen available at a 15.65 (mg N kg−1 soil) and with an increase of 17.14%, Potassium available at a 289.2 (mg K kg−1 soil) and an increase of 6.79%, and the plant height was a rate of 84.87 cm and an increase of 9.41% and bio yield at 810.25 kg dunum−1 and an increase of 34.98%.