- 行业: Agriculture
- Number of terms: 29629
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The ratio of the weight of organic carbon to the weight of total nitrogen in soil or organic material.
Industry:Agriculture
A chemical compound manufactured and accumulated by plants--e.g., sugar, starch, or cellulose. The name is derived from the fact that the relative proportions of C, H, and O in simple carbohydrates is (CH2O)x.
Industry:Agriculture
The sequence of transformations whereby carbon dioxide is fixed in living organisms by photosynthesis or by chemosynthesis, liberated by respiration and by the death and decomposition of the fixing organism, used by heterotrophic species, and ultimately returned to its original state.
Industry:Agriculture
1). A fruit that sheds the seed when dry, consisting of more than one carpel. 2). a plastic structure enveloping a chemical. 3). A relatively thick layer of mucopolysaccharides that surrounds some kinds of bacteria.
Industry:Agriculture
An adaptation where the color of an organism's body blends with the background.
Industry:Agriculture
Used with reference to an ovule or seed. So curved as to bring the apex and base nearly together. Horseshoe shaped.
Industry:Agriculture
The protein coat of viruses forming the closed shell or tube that contains the nucleic acid.
Industry:Agriculture
A microscope with an attached mirror-like device that enables one to illustrate accurately objects seen through.
Industry:Agriculture
A subsurface soil horizon that has undergone marked alteration due to the soil-forming processes (USDA, 1975).
Industry:Agriculture
A mass of thin walled undifferentiated cells, developed as a result of wounding or culture on nutrient media. Plant cells which proliferate on a defined medium and lack morphological differentiation.
Industry:Agriculture
