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DOI: | 10.21273/HORTSCI.36.5.918 |
Web URL(s): | https://journals.ashs.org/hortsci/view/journals/hortsci/36/5/article-p918.xml Last checked: 11/15/2019 Requires: PDF Reader |
Publication Type:
| Refereed |
Author(s): | Scoggins, Holly L.;
Bailey, Douglas, A.;
Nelson, Paul V. |
Author Affiliation: | Department of Horticultural Science, North Carolina State University, Raleigh, NC |
Title: | Development of the press extraction method for plug substrate analysis: Quantitative relationships between solution extraction techniques |
Section: | Soil management, fertilization, & irrigation Other records with the "Soil management, fertilization, & irrigation" Section
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Source: | HortScience. Vol. 36, No. 5, August 2001, p. 918-921. |
Publishing Information: | Alexandria, VA: American Society for Horticultural Science |
# of Pages: | 4 |
Keywords: | TIC Keywords: Electrical conductivity; pH; Substrates; Analytical methods; Relationships; Extraction; Nutrient availability; Plugs
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Abstract/Contents: | "Substrate electrical conductivity (EC), pH, and nutrient content should be monitored frequently during seedling plug production. Current testing methods are either complicated, unsuited to plug production, or interpretation standards do not exist. This study compares the press extraction (PE) method developed at North Carolina State Univ. With the saturated media extract (SME) method and the 1 substrate : 2 water suspension method (1:2). These solution extraction methods were applied to plug trays containing peat-based germination mix treated with four levels of fertilizer. Two sample sizes of 20 or 60 plug cells were used to determine if the smaller, less destructive sample size would produce satisfactory results. Resulting pH values varied within 0.3 units among methods, but variability in EC and nutrient content was great. The PE method resulted in the highest values for EC, NH4+-N, NO3--N, K, Ca, and Mg while sample size had little effect on analyses. The three extraction methods were then compared on peat- and coir-based substrates. Within substrates, pH, EC and nutrients tested were similar for the PE and the SME. The coir extract had a higher pH and much higher levels of K and Na than did the peat extract but was lower in N, P, Ca, and Mg. Overall, fairly strong correlations among testing methods were found, especially between the SME and PE." |
Language: | English |
References: | 19 |
Note: | Tables Graphs |
| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete): Scoggins, H. L., D. A. Bailey, and P. V. Nelson. 2001. Development of the press extraction method for plug substrate analysis: Quantitative relationships between solution extraction techniques. HortScience. 36(5):p. 918-921. |
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| DOI: 10.21273/HORTSCI.36.5.918 |
| Web URL(s): https://journals.ashs.org/hortsci/view/journals/hortsci/36/5/article-p918.xml Last checked: 11/15/2019 Requires: PDF Reader |
| MSU catalog number: SB 1 .H64 |
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