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diffuse out of those pores when the expanded shale aggregate is again surrounded by water ( Sloan et al., 2000 ). This property could make expanded shale a beneficial ingredient of growing media, especially when combined with decomposable organic materials

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Most growing media have a more or less pronounced hydrophobic character in relation to their moisture level ( Michel et al., 2001 ). To remedy this, the addition of mineral materials or wetting agents has been proposed. However, the influence of

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media, 2) the effect of pyriproxyfen in two growing media on western flower thrips pupae, and 3) the residual activity of pyriproxyfen in growing medium on western flower thrips pupae 3, 5, 7, and 14 d after treatments were applied. Materials and Methods

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known as “peat blocks” or “compressed substrate,” soil blocks for vegetable production were developed in the 1970s in Western Europe. Blocks are formed by compressing growing media with a specialized tool into the form of a cube, into which seeds can be

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grown in vitro using different growing media (n = 318). Table 2. Significance of orthogonal contrasts performed on vigor parameters measured in 10 hemp genotypes grown in vivo (n = 49). Overall, the DKW–glucose medium produced the most

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, both of these challenges can be at least partially addressed by growing strawberries in a hydroponic system within high tunnels. Hydroponic production, through the use of nutrient solution or soilless substrates as growing media, eliminates weed

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increase plant yield to gain a fair market share among major producers. Previous research has indicated that perlite growing media can be recycled to save money ( Hanna, 2005 , 2006 ), and precision heating can reduce production costs ( Hanna and Henderson

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nutrients in the media solution and the physical and chemical properties of the growing media may affect the response of plants to a specific substrate and nutrient solution formulation. Tree bark is a traditionally used media for orchid cultivation in

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December to February and increased in March and April ( Fig. 1 ). The increase in precipitation during the second planting replication may have affected media treatments growing on the nursery yard. During the second planting replication, medium treatment 1

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). However, there are unsubstantiated allegations made by a manufacturer that certain plant-growing media containing B. pumilus and an arbuscular mycorrhizal fungus, Glomus intraradices , negatively affect the survival of western flower thrips pupae and

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