1Assistant Scientist, Department of Soil Science, Highland Research and Extension Centre, Kukumseri, Chaudhary Sarwan Kumar Himachal Pradesh Krishi Vishvavidyalaya, Kukumseri, Lahaul & Spiti - 175142.
2Assistant Scientist, Department of Agronomy, Highland Research and Extension Centre, Kukumseri, Chaudhary Sarwan Kumar Himachal Pradesh Krishi Vishvavidyalaya, Kukumseri, Lahaul & Spiti - 175142.
*Corresponding author: Present Address: Chaudhary Sarwan Kumar Himachal Pradesh Krishi Vishvavidyalaya,Palampur-176062.
A field experiment was conducted during 1999 and 2000 at Highland Research and Extension Centre, Kukumseri, Lahaul and Spiti to study the influence of Rhizobium inoculation, incorporation of farmyard manure (FYM) and fertilizer nitrogen (N) on nodule number and weight, nitrogen fixation in rajmash and N balance in the soil. The inoculation of Rhizobium leguminosarum bv.phaseoli to seed and incorporation of FYM one week before sowing of rajmash increased the seed yield. Similarly, inoculation of seed enhanced N fixation and incorporation of FYM left a net positive balance of 42 and 84 kg N, respectively. Though application of excess nitrogen also showed a net positive N balance, it reduced N fixation in rajmash. A higher accumulation rate of available N at the all growth stages of rajmash was observed with incorporation of FYM and inoculation of seed over control.
Lahaul valley, N balance, rajmash yield
