Cilt.2 Sayı.2 2008 / Volume.2 Number.2 2008

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Browsing Cilt.2 Sayı.2 2008 / Volume.2 Number.2 2008 by Author "Kefeli, Valentine"

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    PublicationOpen Access
    Characteristics of Fabricated Soil for Landscape Rehabilitation: The Four Crop Test for Biological Activity
    (İstanbul Kültür Üniversitesi, 2008) Kefeli, Valentine; Leininger, Christopher; Mastalski, Shari; Kimberly, Pincin
    Fabricated soil (FS) is a mixture of substrates containing balanced amounts of carbon, nitrogen, phosphorus, potassium and mineral elements that support plant growth . In our experiments, we use FS for the rehabilitatio n of land f r om mining soil pollutants. Characteristics of fabricated soil were determined including measurements of N, P, K; other nutritive elements including Mg, Ca, S, and Fe; and micro-elements and toxic elements including Mn, Zn, A l , Ni, and Pb. Also , microbial activity of the soil was tested to determine fungal and bacterial presence. After investigating these soil characteristics, we used a four - crop test to investigate fabricated soils and related substrates for biological activity. Soil health includes a balance of mineral and organic elements and healthy microbial activity. These characteristics play the key role in the soil ' s ability to support the growth of higher plants which complete the regenerative process of soil cycling. Healthy soils provide materials for food, energy, and shelter. Healthy soils are crucial to all biological, geological, and water cycles.
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    PublicationOpen Access
    Wood-bark-cambium relations during willow cloning and the mechanism of rooting in Salix discolor
    (İstanbul Kültür Üniversitesi, 2008) Kefeli, Valentine; Leininger, Christopher; Mastalski, Shari; Rehn, Beth
    The process of pussy willow (Salix discolor) propagation, or cloning, is an important biological process , which allows the increase of the amount of plant lets with the properties of the mother plants. Pussy willow has very weak dormancy. Therefore, the process of rootin g of stem cuttings may proceed ten month s in a year except September and October. We investigated the localization of the rooting process on the stem, performing surgery in the form of girdling of bark and partial stripping of bark with cambium from the stem. The process of rootin g was investigated. We observed that roots are formed only on the bark with cambium. If we strip the bark, no roots on the wood were observed . Rooted cuttings were subjected to preparation and we observed that roots were formed only on the bark - cambium complex . During the preparation of the stem, we did not separate bark from cambium and investigated this complex together.