RESIDUAL EFFECT OF NITROGEN LEVELS, ORGANIC MANURES AND
AZOTOBACTER INOCULATION IN MULTI-CUT OATS ON SUCCEEDING SORGHUM CROP
UMA DEVI, K. P. SINGH, SURESH KUMAR, MEENA SEWHAG AND PARVEEN KUMAR
Department of Agronomy
CCS Haryana Agricultural University,
Hisar-125 004 (Haryana), India
(Received : 20 November 2014; Accepted : 20 February 2015)
SUMMARY
Field experiments were carried out to study the residual effect of nitrogen levels, organic manures
and Azotobacter inoculation in multi-cut oats on succeeding sorghum crop at Research Farm, CCS
Haryana Agricultural University, Hisar. The experiment was laid out in split-plot design allocating four nitrogen levels (0, 40, 80 and 120 kg N/ha) and two inoculation levels (no inoculation and inoculation with Azotobacter chrococcum) in main plots and five levels of organic manures (control, FYM @ 5 t/ha, FYM @ 10 t/ha, vermicompost @ 5 t/ha and vermicompost @ 10 t/ha) in sub-plots, replicated thrice. Plant height, tiller number per m. r. l., green fodder and dry matter yields of sorghum were not influenced significantly by residual effect of inoculation. Application of organics during kharif season for oats exerted significant residual effect on succeeding sorghum crop in terms of growth and yield. Among five levels of organic manures, application of vermicompost @ 10 t/ha in oat produced significant effect on all the parameters in sorghum fodder and grain crop viz., growth parameters, yield attributes and yields which were statistically at par recorded in FYM @ 10 t/ha. This might be due to application of higher proportion of nutrients through organic sources in oats and its carry over effect on succeeding sorghum crop.
Key words: Residual effect, nitrogen, manures, Azotobacter, sorghum, oat