Table 1.
Properties of the constituents for growing media in Exp. 1 (50% peat v/v) and Exp. 2 (25% peat v/v).
Table 2.
Component bounds (design constraints) for the mixture matrix calculation in % v/v.
Table 3.
Experimental matrix of the constrained mixture design for Exp. 1 and Exp. 2.
Table 4.
Desirability criteria with, target and min and max boundary for Exp. 1 (50% peat v/v) and Exp. 2 (25% peat v/v).
Days after seeding (DaS), minimum decision value (Min), maximum decision value (Max).
Fig 1.
Description of the methodical procedure for handling peat reduction by using mixture designs and the surface response method.
Fig 2.
Surface response of desirability for 50% v/v peat mixtures for green compost (GC), fermented compost fiber (FC), soft fiber (SF) and raw fiber (RF) in v/v.
Bold dashed lines are the mixture areas of peat substitutes tested. Were (a) = 0 v/v RF, (b) = 0.05 v/v RF, (c) = 0.1 v/v RF and (d) = 0.15 v/v RF.
Fig 3.
Surface response of desirability for 25% v/v peat mixtures for green compost (GC), fermented compost fiber (FC), soft fiber (SF) and raw fiber (RF) in v/v.
Bold dashed lines are the mixture areas of peat substitutes tested. Were (a) = 0 v/v RF, (b) = 0.0375 v/v RF, (c) = 0.075 v/v RF and (d) = 0.1125 v/v RF.
Table 5.
Examples of recommended mixtures for 50% v/v und 25% v/v peat mixtures.