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Table 5 Effect of fertilizers on the lettuce yield in harvest periods

From: Efficiency and effectiveness of vitamin C-substrate organo-mineral straight fertilizer in lettuce (Lactuca sativa L.)

Treatment groups Weeks 1–7 (14.6–18 °C) Weeks 8–15 (10.3–12.1 °C) Total
Total yield (g/plant) Yield rate (%) Total yield (g/plant) Yield rate (%) Yields (g/plant) Yield rate (%)
Control (water only) 89.9 100 47.7 100 137.6 100
r-Ringer (1/2000) 120.8 134 54.5 114 175 127
AGH-Ringer (1/2000) 154.7 172 61.7 129 216.4 157
AGH-Ringer (1/1000) 136.1 151 61.4 129 197.6 144
AGH-Ringer (1/500) 156.5 174 58.2 122 214.7 156
  1. Total crop yield in each soil temperature condition was calculated as the sum of the average (g/plant) of 16 seedlings in every week