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Table 3 ANOVA, Regression coefficients, and summary statistics for percentage fresh weight increase and dry weights of embryogenic tissue.

From: The effects of nitrogen and potassium nutrition on the growth of nonembryogenic and embryogenic tissue of sweet orange (Citrus sinensis(L.) Osbeck)

Source Embryogenic tissue
  Fresh Wgt.a Dry Wgt.a
  F Value p-values Regression coefficientsc F Value p-values Regression coefficientsc
Model 59.82 < 0.0001   49.07 < 0.0001  
Linear Mixture 350.72 < 0.0001   153.04 < 0.0001  
   NH4    + 21.15    + 0.19
   K    + 6.01    + 0.085
NH4 * K 73.69 < 0.0001 + 36.18 86.33 < 0.0001 + 0.54
NH4 * [NO3] 5.68 0.0330 - 6.89 53.20 < 0.0001 + 0.065
K * [NO3] 2.38 0.1471 + 3.15 0.65 0.4339 - 6.69E-03
NH4 * K * [NO3] 0.42 0.5276 - 1.97 0.76 0.3964 - 0.038
NH4 * [NO3]2 15.18 0.0018 - 4.13 0.24 0.6279 + 7.27E-03
K * [NO3]2 0.11 0.7409 - 0.42 0.27 0.6102 - 9.41E-03
NH4 * K * [NO3]2 5.76 0.0321 - 12.44 6.93 0.0188 - 0.20
NH4 * [NO3]3 6.95 0.0205 + 7.95 - - -
K * [NO3]3 2.23 0.1596 - 3.35 - - -
Lack of Fit p = 0.3024 p = 0.0036
R2 0.98 0.96
R2 adj 0.96 0.94
R2 pred 0.80 0.89
Std. Dev. 1.24 0.018
Mean 14.53 0.17
C.V. % 8.52 10.59
Model type reduced quadratic × cubicb quadratic × quadratic
  1. a Data transformation was determined by a Box Cox plot analysis – fresh weight data were transformed by square root and NE dry weight by log base 10.
  2. b Model reduction by backward elimination.
  3. c Presented in coded form. Coding normalizes the factor ranges by placing their low and high range value between -1 and +1 and can thus be directly compared.