(pine straw needles), pine bark nuggets alone (Timberline Mulch; Oldcastle ® , Atlanta, GA) (pine bark), herbicide alone (herbicide), pine straw with herbicide (pine straw + herbicide), pine bark with herbicide (pine bark + herbicide), and a bare soil
objective of this research was to determine flurprimidol dissipation rates from a flurprimidol-coated granule and to compare directly the movement of flurprimidol in sand, pine bark, and hardwood bark. Materials and Methods Greenhouse studies were conducted
SHB are extensively grown do not meet these criteria and must be modified for commercial production. Pine bark is often added to rows before planting to increase substrate organic matter content and porosity, and lower pH ( Duryea et al., 1999
media commonly used in Florida's greenhouse vegetable industry are perlite, pine bark, and commercial peatmoss-based mixtures. These media have adequate aeration porosity and water-holding capacity ( Burés, 1997 ; Pokorny, 1987 ; Raviv et al., 2002
Peat moss and pine bark are the primary components of growth substrates in the production of container-grown herbaceous crops. However, there is concern that the availability of pine bark for horticultural usage might be limited as a result of
°F (19.4 °C) average day and night temperature. Producers use rockwool as growing media in large commercial operations around the world ( Papadopoulos, 1991 ). Most Mississippi growers use locally produced pine bark that has been finely shredded and
%, 40%, and 50%, by volume totaling 15 mixes. In addition, 100% components of peat, perlite, PWC, SPW, aged pine bark (PB), and coconut coir pith (Densu Coir, Canada) were also tested to attain characteristics of other traditionally used greenhouse
available, pre-blended filter bed substrates were evaluated, each with a different base component and the same source of organic matter (pine bark fines). The sand-based substrate (sand) was a blend (v/v/v) of 80% washed sand, 15% clay and silt fines, and 5
quality and quick salability. Stratifying high-performance peat-based substrates atop of low-cost pine bark may present benefits for growers in the form of reducing peat use and subsequently lowering substrate-related expenditures. To expand, a high
Abstract
The response of cape primrose (Streptocarpus) plants to external N application is dependent on growth media only in terms of response magnitude. A 2.0% to 2.9% tissue N level in either sand or bark media maximized shoot dry weight, the number of potential flowers, and the quantity and quality of plantlets regenerated during subsequent asexual propagation. In sand, 2.9% tissue N was below the level required for maximum leaf elongation and resulted in a desirable restriction of the primary leaf (phyllomorph). Tissue N levels that either exceeded or lagged behind the optima were often detrimental to plant aesthetics, and wasteful where luxuriant tissue levels did not affect the measured characteristics.