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The Leaf Color Chart (LCC) is a diagnostic tool used to determine the nitrogen level in rice plants relative to the shade of green of the plant's leaves. It is a ruler-shaped strip containing at least four panels of color, ranging from yellowish green to dark green. The leaf of the plant is compared with the color panels to determine how much ...
A leaf spot is a limited, discoloured, diseased area of a leaf that is caused by fungal, bacterial or viral plant diseases, or by injuries from nematodes, insects, environmental factors, toxicity or herbicides. These discoloured spots or lesions often have a centre of necrosis (cell death). [1] Symptoms can overlap across causal agents, however ...
Chart illustrating leaf morphology terms. The following terms are used to describe leaf morphology in the description and taxonomy of plants. Leaves may be simple (a single leaf blade or lamina) or compound (with several leaflets). The edge of the leaf may be regular or irregular, may be smooth or bearing hair, bristles or spines.
genus Potyvirus, Potato virus Y (PVY, strains O, N and C) Potato stem mottle (spraing of tubers) genus Tobravirus, Tobacco rattle virus (TRV) Potato spindle tuber. Potato spindle tuber viroid (PSTVd) Potato yellow dwarf virus. genus Nucleorhabdovirus, Potato yellow dwarf virus (PYDV) Potato yellow mosaic virus.
A decision tree is a flowchart -like structure in which each internal node represents a "test" on an attribute (e.g. whether a coin flip comes up heads or tails), each branch represents the outcome of the test, and each leaf node represents a class label (decision taken after computing all attributes). The paths from root to leaf represent ...
A leaf (pl.: leaves) is a principal appendage of the stem of a vascular plant, [1] usually borne laterally aboveground and specialized for photosynthesis. Leaves are collectively called foliage, as in "autumn foliage", [2][3] while the leaves, stem, flower, and fruit collectively form the shoot system. [4]
Plant morphology. Phytomorphology is the study of the physical form and external structure of plants. [1] This is usually considered distinct from plant anatomy, [1] which is the study of the internal structure of plants, especially at the microscopic level. [2] Plant morphology is useful in the visual identification of plants.
Indehiscent – not opening at maturity. Reticulate – web-like or network-like. Striated – marked by a series of lines, grooves, or ridges. Tesselate – marked by a pattern of polygons, usually rectangles. Wing (plant) – any flat surfaced structure emerging from the side or summit of an organ; seeds, stems.