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  2. Have you tested your garden soil? Here's what you should know

    www.aol.com/tested-garden-soil-heres-know...

    The level of nutrients in the soil typically increases as we add fertilizers, manures, compost, mulch and lime or sulfur. Soil tests can also help gardeners and homeowners determine which plants ...

  3. Garden: It is time to test your garden soil - AOL

    www.aol.com/news/garden-time-test-garden-soil...

    Do you know the nutrient level of the soil in your garden? Do you know how much fertilizer to add next season? Soil testing will answer both questions.

  4. The Best Soil Test Kits Will Help You Grow Your Perfect Garden

    www.aol.com/lifestyle/best-soil-test-kits-help...

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  5. Winogradsky column - Wikipedia

    en.wikipedia.org/wiki/Winogradsky_column

    Of specific interest are the red regions of the middle column, indicative of purple non-sulfur bacteria (e.g. Rhodospirillaceae). Also, in column three, the red growth along the side of the column: a purple sulfur bacterium, Chromatium. The Winogradsky column is a simple device for culturing a large diversity of microorganisms.

  6. Plant nutrients in soil - Wikipedia

    en.wikipedia.org/wiki/Plant_nutrients_in_soil

    Nutrients in the soil are taken up by the plant through its roots, and in particular its root hairs.To be taken up by a plant, a nutrient element must be located near the root surface; however, the supply of nutrients in contact with the root is rapidly depleted within a distance of ca. 2 mm. [14] There are three basic mechanisms whereby nutrient ions dissolved in the soil solution are brought ...

  7. Base-cation saturation ratio - Wikipedia

    en.wikipedia.org/wiki/Base-cation_saturation_ratio

    Base-cation saturation ratio (BCSR) is a method of interpreting soil test results that is widely used in sustainable agriculture, supported by the National Sustainable Agriculture Information Service (ATTRA) [1] and claimed to be successfully in use on over a million acres (4,000 km 2) of farmland worldwide.

  8. Soil test - Wikipedia

    en.wikipedia.org/wiki/Soil_test

    A soil test is a laboratory or in-situ analysis to determine the chemical, physical or biological characteristics of a soil. Possibly the most widely conducted soil tests are those performed to estimate the plant-available concentrations of nutrients in order to provide fertilizer recommendations in agriculture.

  9. Sulfur assimilation - Wikipedia

    en.wikipedia.org/wiki/Sulfur_assimilation

    Sulfur assimilation in microorganisms is regulated by a variety of environmental factors, including the availability of sulfur in the medium and the presence of other nutrients. The activity of key enzymes in the sulfur assimilation pathway is also regulated by feedback inhibition from downstream products, similar to the regulation seen in plants.

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