SOYBEAN RESEARCH

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was noted with 20 kg N per ha as basal + 40 kg N per ha at R 5 stage, which was higher by 34.49 per cent over control, 26.46 per cent over recommended dose, 18.54 per cent over 40 kg N per ha as basal, 17.69 per cent over 10 + 10 kg N per ha and 10.66 per cent over 20 + 20 kg N per ha. A similar trend was also recorded in case of straw yield. Nitrogen uptake was also increased as the levels of nitrogen increases and further enhancement was recorded with split application of nitrogen. Maximum N 2 fixation occurs between the R 3 and R 5 stages of soybean development (Zapata et al., 1987), and any gaps between crop N demand and N supply by N 2 fixation must be met by N uptake from other sources. Studies of nodulated soybeans showed significant yield response to frequent N additions when the N 2 fixation apparatus could not meet N demand (Thies et al., 1995; Wesley et al., 2013). Agronomic efficiency and partial factor productivity decreased as the levels of nitrogen increased and their highest values were associated with 10 (basal) +10 (at R 5 stage) kg N per ha (Table 2). However, the recovery efficiency increased with increasing Table 2. Effect of land configuration and nitrogen levels on nitrogen use efficiencies and economics of soybean genotypes Treatment AE (kg/kg) PFP (kg/kg) RE (%) 36 Total N uptake (kg/ha) Additional yield (kg/ha) Additional returns (Rs/ha) IBCR Land configuration Flat bed 9.49 56.98 28.18 174.19 339 11605 14.27 BBF 11.29 60.00 30.53 183.98 398 13669 49.88 SEm - - - - - - - CD (P=0.05) - - - - - - - Variety JS 95 60 9.67 49.32 17.77 152.38 348 11656 14.54 JS 97 52 11.12 63.86 40.51 206.89 389 13565 16.20 SEm (±) - - - - - - - CD (P=0.05) - - - - - - - Nitrogen level (kg/ha) 0 - - - 151.18 - - - 20 7.82 97.30 21.20 163.70 122 5357 11.77 40 7.15 51.90 27.20 180.29 225 9869 13.90 10+10 15.09 104.57 34.06 177.92 302 10205 15.58 20+20 10.86 55.60 33.66 192.54 434 14923 16.40 20+40 11.05 41.02 33.47 213.29 663 22672 19.54 SEm (±) - - - - - - - CD (P=0.05) - - - - - - - AE-Agronomic efficiency, PFP- Partial Factor Productivity, RE- Recovery efficiency; IBCR- Incremental benefit cost ratio
increasing levels of nitrogen and the maximum being with 10 (basal) + 10 (at R 5 stage) kg N per ha. Recovery efficiency increased from 0.18 to 0.74 kg per kg when nitrogen was applied late as compared to early (Gan et al., 2002). The application of 20 (basal) + 40 (at R 5 stage) kg N per ha was found to be the most sustainable (0.78) and closely followed by 20 (basal) + 20 (at R 5 stage) kg N per ha (0.71). The application of nitrogen either as basal or in splits produced SYI values more than 0.60 as compared to without nitrogen (control) (0.57). REFERENCES Abendroth L J, Elmore R W and Ferguson R B. 2006. Soybean Inoculation, University of Nebraska Lincoln Extension Publication G1621, University of Nebraska-Lincoln. Barker D W and Sawyer J E. 2005. Nitrogen application to soybean at early reproductive development. Agronomy Journal 97: 615–9. Fahong W, Xuqing W and Sayre K. 2004. Comparison of conventional, flood irrigated, flat planting with furrow irrigated, raised bed planting for winter wheat in China. Field Crops Research 87: 35-42. Gan Y, Stulen I, Posthumus F, Keulen H V and Kuiper P J C. 2002. Effects of N management on growth, N 2 fixation and yield of soybean. Nutrient Cycling in Agroecosystem 62: 163–74. Gan Y, Stulen I, van Keulen, H and Kuiper P J C. 2003. Effect of N fertilizer topdressing at various reproductive stages on growth, N 2 fixation and yield of three soybean (Glycine max The additional yield, additional returns and IBCR increased as levels of nitrogen increased and the highest were observed with 20 (basal) + 40 (at R 5 stage) kg N per ha (Table 2). The application of nitrogen in splits has been found to be more sustainable than applied as basal only. On the basis of three years results, it could be concluded that the planting of soybean variety JS 97-52 on BBF with split application of nitrogen 20 kg N per ha as basal + 40 kg N per ha at R 5 stage found to be most productive, remunerative and nitrogen use efficient. (L.) Merr.) genotypes. Field Crops Research 80: 147–55. Gurmu Fekadu, Hussein Mohammed and Getinet Alemaw. 2009. Genotype x environment interactions and stability of soybean for grain yield and nutrition quality. African Crop Science Journal 17(2): 87-99. Izaguirre-Mayoral M L and Sinclair T R. 2005. Soybean genotypic difference in growth, nutrient accumulation and ultrastructure in Response to manganese and iron supply in solution culture. Annals of Botany 96: 149-58. Mandal K G, Hati K M, Misra A K, Bandyopadhyay K K. Tripathi A K. 2013. Land surface modification and crop diversification for enhancing productivity of a Vertisol. International Journal of Plant Production 7(3): 455-72. Ngalamu Tony, Ashraf Muhammad and Meseka Silvestro. 2013. Soybean (Glycine max L) genotype and environment interaction effect on yield and other related traits. American Journal of Experimental Agriculture 3(4): 977-98. 37
Page 1 and 2: ISSN 0973-1830 Volume 14, Number 2
Page 3 and 4: SOYBEAN RESEARCH ISSN 0973-1830 Vol
Page 5 and 6: Soybean Research 14(2): 01-13 (2016
Page 7 and 8: Table 1. Nutrient composition (valu
Page 9 and 10: 100-green seed weight (49.9 g) and
Page 11 and 12: Training was provided through NGO p
Page 13 and 14: estimated using combined analysis.
Page 15 and 16: AGS 447 and AGS 457 in a taste surv
Page 17 and 18: Takahashi Y and Ohyama T. 2011. Pro
Page 19 and 20: eached to about 81,4435 ha in 2013
Page 21 and 22: 2. Soybean seeds were sown in both
Page 23 and 24: Table 1. Effect of ridge width, cro
Page 25 and 26: Table 3. Effect of ridge width, cro
Page 27 and 28: and seed yields per ha were affecte
Page 29 and 30: number of branches per plant, pod a
Page 31 and 32: cv. Giza 35 to increase dry matter
Page 33 and 34: increased total and net returns com
Page 35 and 36: Metwally A A. 1999. Intensive coppi
Page 37 and 38: (Salvagiotti et al., 2009). Biologi
Page 39: Table 1. Effect of land configurati
Page 45 and 46: conditions (Ruiz-Lozano et al., 200
Page 47 and 48: of 34 0 C and relative humidity 80
Page 49 and 50: Nodule N (%) Grain yield g/plant) N
Page 51 and 52: 140 120 100 Nodules/plant Nodule dr
Page 53 and 54: of AMF, which necessitates experime
Page 55 and 56: Biermann B and Linderman R G. 1981.
Page 57 and 58: Tabatabai M A and J M Bremner. 1969
Page 59 and 60: N:P 2O 5:K per ha (Patil and Purani
Page 61 and 62: available nitrogen content was reco
Page 63 and 64: lowest value in control (Table 2).
Page 65 and 66: the crop. These results corroborate
Page 69 and 70: the use of a variety by any person
Page 71 and 72: objection is received, the variety
Page 73 and 74: Table 1 contd. S. No. Name of varie
Page 75 and 76: Table 2. DUS Characteristics of pro
Page 77 and 78: Table 2. Contd S. No. Varieties DUS
Page 79 and 80: and are easily available. The varie
Page 83 and 84: Table 2. Estimates of variability p
Page 85 and 86: Table 4. Phenotypic path coefficien
Page 87 and 88: Shivakumar M, Basavaraja G T, Salim
Page 89 and 90: available phosphorus (24.89 and 23.
Page 91 and 92:
attributes may be the result of red
Page 93 and 94:
Soybean Research 14(2): 89-96 (2016
Page 95 and 96:
productivity. This will help increa
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Growth rate The analysis on growth
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Table 5. Estimates of variability i
Page 101 and 102:
Society for Soybean Research and De
Page 103 and 104:
MS must be original and contribute
Page 105 and 106:
Short research notes They should no
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