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  2. Nitrogen deficiency - Wikipedia

    en.wikipedia.org/wiki/Nitrogen_deficiency

    Symptoms of nitrogen deficiencies in plants is general chlorosis of the leaves, which is when leaves turn pale green, and leaves cup upwards quite severely in deficient plants. [4] Nitrogen deficiencies also cause leaves to remain small, and drop prematurely, resulting in less photosynthesis occurring in the plant, and fewer, smaller tubers can ...

  3. Ecophysiology - Wikipedia

    en.wikipedia.org/wiki/Ecophysiology

    Too much or too little water can damage plants. If there is too little water then tissues will dehydrate and the plant may die. If the soil becomes waterlogged then the soil will become anoxic (low in oxygen), which can kill the roots of the plant. [8] The ability of plants to access water depends on the structure of their roots and on the ...

  4. Abscission - Wikipedia

    en.wikipedia.org/wiki/Abscission

    The reduction of chlorophyll production in leaves due to decreased sunlight in the autumn explains why some leaves turn yellow. However, the yellow color can attract aphids, so some trees turn the leaves red instead by injecting a bright pigment. [8] The loss of chlorophyll may also contribute to the abscission process. [citation needed]

  5. Root rot - Wikipedia

    en.wikipedia.org/wiki/Root_rot

    The leaves of plants experiencing root rot often yellow and die, and if allowed to continue, the condition can be fatal to the plant. To avoid root rot, it is best to only water plants when the soil becomes dry, and to put the plant in a well-drained pot. Using a dense potting media such as one dug up from outdoors can also cause root rot.

  6. Autumn leaf color - Wikipedia

    en.wikipedia.org/wiki/Autumn_leaf_color

    A green leaf is green because of the presence of a pigment known as chlorophyll, which is inside an organelle called a chloroplast.When abundant in the leaf's cells, as during the growing season, the chlorophyll's green color dominates and masks out the colors of any other pigments that may be present in the leaf.

  7. Too much tomato, zucchini in your garden? Here's what to do ...

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    Zucchini is the late-season garden gift that keeps on giving. Back when I first moved to Maine, with its long days and cool summers, local gardeners cautioned me to keep my car doors locked in ...

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  9. Manganese deficiency (plant) - Wikipedia

    en.wikipedia.org/wiki/Manganese_deficiency_(plant)

    Manganese deficiency can be easy to spot in plants because, much like Magnesium deficiency (agriculture), the leaves start to turn yellow and undergo interveinal chlorosis. The difference between these two is that the younger leaves near the top of the plant show symptoms first because manganese is not mobile while in magnesium deficiency show ...