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Relative Performance of Neem Coated Urea Viz-a-Viz Ordinary Urea Applied to Rice-Wheat Cropping in Sub-Tropical Soils


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1 Department of Soil Science, Krishi Vigyan Kendra, Kapurthala (Punjab), India
     

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On-farm trials (OFTs) at eighteen different farmer field locations varying in soil fertility were conducted (2006-08) to assess the relative performance of different nitrogen sources viz., neem coated urea (NCU) and ordinary urea (OU). The treatments thus compared consisted of 96 and 120 kg N ha-1 through NCU and OU, thus, constituting T1=80% NCU, T2=80% OU, T3=100% NCU and T4=100% OU. The grain yield for wheat and rice in T3/T4 was significant (p<0.05) (6.9% and 13.8%, respectively) higher than T1/T2, however, the grain yield among equivalently applied N treatments was statistically at par. The results revealed no significant differences in agronomic efficiency of N (AEN) applied through different sources at equal applied level. However, there was significantly higher AEN for T1/T2 than T3/T4 in both wheat and rice. The total energy productivity for wheat in T3/T4 was 6.87 per cent higher, with a decrease in energy productivity by 0.11 MJ ha-1 than T1/T2. However, in rice the total energy productivity was 14.9 per cent higher in T3/T4 with 0.16 MJ ha-1 over T1/T2. Thus, it can be concluded that the two N sources are equally effective for rice-wheat cropping in sub-tropical soils.

Keywords

Agronomic Efficiency, Crop Yield, Energy Productivity, Neem Coated Urea, Sub-Tropical Soils.
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  • Relative Performance of Neem Coated Urea Viz-a-Viz Ordinary Urea Applied to Rice-Wheat Cropping in Sub-Tropical Soils

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Authors

Rajan Bhatt
Department of Soil Science, Krishi Vigyan Kendra, Kapurthala (Punjab), India

Abstract


On-farm trials (OFTs) at eighteen different farmer field locations varying in soil fertility were conducted (2006-08) to assess the relative performance of different nitrogen sources viz., neem coated urea (NCU) and ordinary urea (OU). The treatments thus compared consisted of 96 and 120 kg N ha-1 through NCU and OU, thus, constituting T1=80% NCU, T2=80% OU, T3=100% NCU and T4=100% OU. The grain yield for wheat and rice in T3/T4 was significant (p<0.05) (6.9% and 13.8%, respectively) higher than T1/T2, however, the grain yield among equivalently applied N treatments was statistically at par. The results revealed no significant differences in agronomic efficiency of N (AEN) applied through different sources at equal applied level. However, there was significantly higher AEN for T1/T2 than T3/T4 in both wheat and rice. The total energy productivity for wheat in T3/T4 was 6.87 per cent higher, with a decrease in energy productivity by 0.11 MJ ha-1 than T1/T2. However, in rice the total energy productivity was 14.9 per cent higher in T3/T4 with 0.16 MJ ha-1 over T1/T2. Thus, it can be concluded that the two N sources are equally effective for rice-wheat cropping in sub-tropical soils.

Keywords


Agronomic Efficiency, Crop Yield, Energy Productivity, Neem Coated Urea, Sub-Tropical Soils.