Effects Of Inoculation On The Growth Of Soybeans [Glycine Max (l.) Merrill] Planted In Soils From Different Geographical Location In North Western Nigeria
A study was conducted to determine the effect of inoculation on the growth of soybeans (Glycine max). Soil samples were collected from seven locations namely; Albasu, Bichi, Garko, Gaya (Sudan savanna), Giwa, Soba and Z/kataf (northern guinea savanna). The result showed that across treatments there was no significant difference in the height of soybeans at two, four and eight weeks of planting. The results also showed that; the mean number of nodules was found to be higher in soybeans inoculated with rhizobin inoculants (9.39) followed by the soybeans inoculated with nitrogen (2.96) and control (2.67). However, there was no significant difference between the nitrogen and the control treatments at P < 0.05. The soybeans inoculated with nitrogen have the higher mean root dry weight (2.98g) followed by those inoculated with the rhizobin inoculants (1.39g), and the control has the least mean root dry weight (0.58g). From the result the mean spad value of soybeans across treatments showed that; at fourth week of planting the soybeans inoculated with nitrogen has the highest mean spad value (31.31) followed by the soybeans inoculated with rhizobin inoculants and the control (29.59 and 28.63 respectively). At eighth week the mean spad value of the soybeans inoculated with nitrogen has the highest mean spad value (31.03) followed by those inoculated with rhizobin inoculants (29.73) and the control has the least mean spad value (27.83), and the higher the spad value the higher the nitrogen content of the soybeans. There is need to inoculate the soils since there was significant difference between the treatments.
Keywords: Soil, Soybeans, Inoculation, Inoculants, Nitrogen, Shoot, Root Dry Weight, Spad Values