2.1. Seeds, Rhizobium strains and fertilizers
Seeds of the fenugreek cultivars Baladi and Rubatab
were supplied by the Ministry of Agriculture, Sudan.
Rhizobium strain ENRRI 11 was locally isolated,
whereas, strain TAL 380 was supplied by NifTAL
Project, Paia, HI. The strains were maintained at 4C
on yeast extract mannitol agar (YEMA) slopes. Nitro-
gen was applied in the form of urea at the rate of
50 kgNhaÿ1, whereas molybdenum was applied in the
form of ammonium molybdate at the rate of
1.0 kgMohaÿ1.