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Table 2 Mean squares of analysis of variance for year, N fertilizer rate and time of N application, and their interaction

From: Effect of split application of different N rates on productivity and nitrogen use efficiency of bread wheat (Triticum aestivum L.)

Source DF GY GNUP TNUP AE RE APE NHI
Y 1 3,386,971** 789.77** 6813.22** 506.38** 4492.67** 270.07ns 839.08**
Rep (Y) 6 61,018 30.39 120.53 18.85 35.95 51.62 18.28
N 2 12,053,826** 22,875.82** 43,818** 2090.92** 2817.12** 3064.21** 120.10**
T 4 7,906,065** 4969.21** 10,914** 127.93** 1622.94** 287.29** 108.04**
N × T 8 1,127,802** 720.28** 1632.7** 6.12ns 68.09* 11.19ns 26.01*
Y × N 2 233836ns 211.25ns 552.37* 43.59** 142.47* 0.26ns 31.07*
Y × T 4 311205ns 254.56* 59.89ns 4.32ns 24.27ns 167.89** 43.21**
Y × N × T 8 231,387ns 70.27ns 115.94ns 4.89ns 32.98ns 6.73ns 11.28ns
Error 84 130,052 94.9 124.13 3.07 27.57 11.52 9.13
  1. Y year, Rep replication, N N rate, T timing of N application, Df degree of freedom, GY grain yield, GNUP grain nitrogen uptake, TNUP total nitrogen uptake, AE agronomic efficiency, RE recovery efficiency, APE agro-physiological efficiency, NHI nitrogen harvest index
  2. *Significant at the 0.05 probability level; **Significant at P < 0.01 probability level