Joint International Conference on Long-term Experiments ...

Table 3: Dry matter production of perennial ryegrass (g pot -1 )
Látókép chernozem, 1st+2nd cut
Factors Unlimed Limed Average
N=80
Ni=0 7.53 8.02 7.77
Ni=50 7.65 7.55 7.60
Ni=100 7.68 7.68 7.68
Average 7.62 7.75 7.68
N=160
Ni=0 10.20 9.18 9.69
Ni=50 9.93 10.05 9.99
Ni=100 9.67 9.60 9.64
Average 9.93 9.61 9.77
N average
Ni=0 8.86 8.60 8.73
Ni=50 8.79 8.80 8.79
Ni=100 8.67 8.64 8.66
Average 8.78 8.68 8.73
Table of variance
Factor MQ DF F SD5%
N 52.292 1 234.9 *** 0.28
Ni 0.076 2 0.34 0.38
N*Ni 0.273 2 1.22 0.48
CaCO3 0.11 1 0.49 0.28
N*CaCO3 0.63 1 2.83 0.398
Ni*CaCO3 0.86 2 0.39 0.48
N*Ni*CaCO3 0.876 2 3.94 * 0.68
*** Significant at P=0.1 % level * Significant at P=5.0 % level
No considerable differences were found in dry matter yield of the first and second cuts.
This suggests that the amount of nutrients applied to 1 kg chernozem soil and the
natural nutrient-supplying capacity of the soil were satisfactory for plant development.
Regarding the summarized yield of the two cuts on shifting sandy soil, it can be stated
that all three treatment factors had a significant effect.
Increasing nitrogen dosages increase yield significantly as proven by the statistical
analysis (P = 1.0 %). However, the increasing effect was different at different lime
dosages. Without lime treatment, higher nitrogen doses resulted in a smaller yield
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