Effect of Dolomitic Lime Rate and Application Method on Substrate pH and Creeping Woodsorrel Establishment

Wada, Sugae; Altland, James E.; Mallory‐Smith, Carol; Stang, J. R.

doi:10.24266/0738-2898-24.4.185

Cited by 3 publications

(3 citation statements)

References 4 publications

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“…This volumetric water gradient can also affect other chemical and biological properties as greater moisture affects decomposition processes [26], mineral nutrient release from controlled release fertilizers [27], and gas emissions from the substrate [28]. Wada et al [29] showed decreasing substrate pH in containers from the surface to the container bottom and attributed the higher pH near the substrate surface to irrigation water alkalinity having greater effect on the substrate surface than deeper in the container. Jeong et al [30] also reported stratification of pH and EC through the container profile; however, they reported the opposite trend with pH increasing from the top to the bottom while EC decreased.…”

Section: Substrate Stratificationmentioning

confidence: 99%

The Pour-Through Procedure for Monitoring Container Substrate Chemical Properties: A Review

Altland

2021

Horticulturae

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The pour-through procedure is a nondestructive method commonly used by horticultural crop producers and research scientists to measure chemical properties and nutrient availability in container substrates. It is a method that uses water as a displacement solution to push the substrate solution out of the bottom of the container so it can be analyzed for pH, electrical conductivity, and nutrient concentrations. The method was first introduced in the early 1980s. Since then, research has been conducted to determine factors that affect the results of the pour-through including volume, nature and timing of application of the displacement solution, container size, and substrate stratification. It has also been validated against other common methods for determining container substrate pH, EC, and nutrient concentration, most notably the saturated media extraction procedure. Over the past 40 years, the method has been proven to be simple, robust, and consistent in providing crop producers and researchers valuable information on substrate chemical properties from which management decisions and experimental inferences can be made.

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Section: Substrate Stratificationmentioning

confidence: 99%

The Pour-Through Procedure for Monitoring Container Substrate Chemical Properties: A Review

Altland

2021

Horticulturae

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“…The mechanisms underlying possible seedbank regulation by soil pH are unclear, but could include toxicity from aluminum or other heavy metals, or changes in the fungal:bacterial ratio of the soil microbial community that affect seed decay (Pakeman et al 2012). Soil pH can also affect the quantity of seed inputs to the soil by affecting growth and subsequent seed production in some weed species (Wada et al 2006).…”

Section: Resultsmentioning

confidence: 99%

Environmental Correlates with Germinable Weed Seedbanks on Organic Farms across Northern New England

et al. 2017

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The northern New England region includes the states of Vermont, New Hampshire, and Maine and encompasses a large degree of climate and edaphic variation across a relatively small spatial area, making it ideal for studying climate change impacts on agricultural weed communities. We sampled weed seedbanks and measured soil physical and chemical characteristics on 77 organic farms across the region and analyzed the relationships between weed community parameters and select geographic, climatic, and edaphic variables using multivariate procedures. Temperature-related variables (latitude, longitude, mean maximum and minimum temperature) were the strongest and most consistent correlates with weed seedbank composition. Edaphic variables were, for the most part, relatively weaker and inconsistent correlates with weed seedbanks. Our analyses also indicate that a number of agriculturally important weed species are associated with specific U.S. Department of Agriculture plant hardiness zones, implying that future changes in climate factors that result in geographic shifts in these zones will likely be accompanied by changes in the composition of weed communities and therefore new management challenges for farmers.

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“…More importantly, pH and EC (the primary parameters measured from pour-through extracts) form an electrochemical gradient within the vertical profile of the container. Wada et al (2006) showed decreasing substrate pH in containers from the surface to the container bottom and attributed the higher pH near the substrate surface to alkalinity of surface applied irrigation water having greater effect on the substrate surface than lower in the container. Jeong et al (2012) reported the opposite trend, with pH increasing from the top to the bottom, whereas EC decreased.…”

mentioning

confidence: 99%

The Pour-through Procedure Preferentially Extracts Substrate Solution from the Bottom of the Container in Conventional and Stratified Substrates

Altland,

Owen

2024

horts

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Due to the widespread use of the pour-through extraction procedure in horticultural production and research, the objective of this study was to determine if the method is biased by preferentially extracting substrate solution near the bottom of the container in both conventionally filled containers as well as intentionally stratified containers. Eight treatments were created using 2.5-L, 17.5-cm tall plastic nursery containers. The first four treatments were created by layering a conventional pine bark substrate (CONV) that was either amended (+A) or nonamended (−A) with fertilizer and lime with the following layers: amended substrate throughout the entire container profile (+A/+A); amended substrate in the top half (top 8.5 cm) over nonamended substrate in the bottom half of the container profile (+A/−A); nonamended substrate in the top half over amended substrate in the bottom half (−A/+A); and nonamended substrate throughout the profile (−A/−A). An additional four treatments were created by intentionally stratifying (STRAT) a fine pine bark substrate (FINE) over a coarse pine bark substrate (CRSE) with the same amendment combinations of +A or −A. On 0 and 42 d after potting, substrate pH and electrical conductivity (EC) were determined on samples collected by the pour-through procedure and 1:1 water extracts of the top and bottom layers in the container. At 42 d after potting, nutrient ions (NO3−, PO42−, K, Ca, Mg, and SO42−) were also measured in both pour-through and 1:1 water extracts of the top and bottom layers. At both dates and in both CONV and STRAT containers, pour-through substrate pH and EC more closely reflected those measurements in the bottom half of the container as determined by the 1:1 water extract. At 42 d after potting, nutrient ions determined by the pour-through procedure were more highly correlated to the 1:1 water extracts from the bottom half of the container compared with the top half of the container in both CONV and STRAT substrates. Evidence herein demonstrates that the pour-through procedure is more reflective of the lower half of the container than the upper half for both CONV and stratified substrates.

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Effect of Dolomitic Lime Rate and Application Method on Substrate pH and Creeping Woodsorrel Establishment

Cited by 3 publications

References 4 publications

The Pour-Through Procedure for Monitoring Container Substrate Chemical Properties: A Review

The Pour-Through Procedure for Monitoring Container Substrate Chemical Properties: A Review

Environmental Correlates with Germinable Weed Seedbanks on Organic Farms across Northern New England

The Pour-through Procedure Preferentially Extracts Substrate Solution from the Bottom of the Container in Conventional and Stratified Substrates

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