Abstract
concentrations with the largest plants being obtained at 200 mg L-1 N treatment in the PM+PL mix and 100 mg L-1 N treatment in the PM+VM mix. The substrate ECs in these two treatments were 0.89 and 1.41 dS m-1 indicating that the desirable range of soluble salts in soil extracts is higher in the PM+VM mix than the PM+PL mix. Results of this study suggest that fertilizer strengths need to be adjusted differently for each root substrate formulation to produce high quality seedling grafts of tomato.
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