Compensating nutrient requiremment in pearl millet (Pennisetum glaucum)-wheat (Triticum aestivum) cropping system through manures and biofertlizers in semi arid resion of Haryana.

A filed experiment was conducted for 4 years i.e. from rainy (kharif) season 2004 to winter season 2007-08 t Hisar to study compensating requirement in pearl millet (Pennisetum galucum (L.) R. Br. Emend. Stuntz]-wheat [Triticum aestivum (L.) emend. Fiori and paol.] using manures and biofertilizer. The recommended dose of 40 kg N + 20 kg P2O5/ha to pearl millet and 60 kg N + 30 kg P2O5/ha to wheat + 20 kg K2O/ha (T1) and 50% of the recommended dose of nitrogen in both the crop + 5.0 tonnes farmyard manure beore pearl millet sowing + seed inoculation with Azospirillum in pearl millet an Azotobacter in wheat + phosphate-solubilizing bacteria (PSB) (T4) resulted 54.1 and 46.6% higher grain yield than the control (no application of any fertilizer). In wheat the grain yield under treatment T1 being at par with 100% of the recommended dose of N and P in both the crops (T2) recommended N in both the crop (T3) T4 (3047 kg/ha) and T5, 50% of the RDN in both the crops + 2.5tonnes farmyard manure before pearl millet sowing + seed inoculation with azospirillium in pearl millet/Azotobacter in wheat + PSB (3102 kg/ha) was statistically better than T6, 15.0 tonnes farmyard manure before pearl millet owing + seed inculation with azospirillim in pearl millet sowing + seed inoculation with azospirillumm in pearl millet and Azospirillum in pearl millet and/Azotobacter in wheat + PSB (2664/kg/ha) T7 7.5 tonnes vermicompost before pearl millet sowing +seed inoculation with Azospirillium in pearl millet and/Azotobacter in wheat + PSB (2735 kg/ha) and control (2154 kg/ha) treatments. Maximum pearl millet equivalent yield was in the T1 (11991 kg/ha) which followed by T2 (11684 kg/ha) T5 (11096 kg/ha) and T4(10973 kg/ha) treatments. On mean basis, protein content was highest in T4 (11.14%). Followed by t3 (11.09%) and T (10.99%) and minimum value of 9.99% was recorded in control. The values of pH and electrical conductivity were almost similar in T1, T2 and T3 treatments compared with the control and these values decreased in T4 to T7 treatments. In general organic carbon content was static where only chemical fertilizer were used but substantial increase was observed where pure organic and biofertilizer were used. Nitrogen and phosphate balance was higher in organic manure and biofertilizer treatments as compared to inorganic fertilizer treatments. However, potash content decreased compared to initial status in the soil after 4 years of crop sequence of pearl millet-wheat. Treatment T1 gave 54.1 and 110.6% higher gross and net returns over the control (T8) B:C ratio (2.29) system productivity (32.9 kg/ha/day) and profitability (Rs 155.3 ha/day) were quit higher in T1 treatment than the control (1.70, 21.3 and 73.7, respectively).