- 行业: Agriculture
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Designation for the bulu and gundil varieties of Indonesia and many upland rices. They belong to the japonica race of O. sativa. Rice varieties with broad, stiff, light green leaves. It is low-tillering and has a tall plant stature. Grains are long, broad, and thick, awned or awnless. Javanica grains are low-shattering and have 0-25% amylose content.
Industry:Agriculture
An ocher-yellow or brown mineral consisting of basic sulfate of potassium and iron and occurring in minute rhombohedral crystals or in masses. Found in acid sulfate soils.
Industry:Agriculture
One of the two major ecogeographical races of O. sativa (see also indica).A group of rice varieties from northern and eastern China grown extensively in some areas of the world. It has narrow, dark green leaves, medium-height tillers and short to intermediate plant stature. It is found in the cooler zones of the subtropics and in the temperate zones. Grains are short, roundish, spikelets awnless to long-awned, panicles low-shattering, and have 0-20% amylose content.
Industry:Agriculture
The logical and well-ordered combination of techniques applied to a crop by the farmer to achieve a given production objective in a given environment.
Industry:Agriculture
Or intertropical discontinuity (ITD); a broad trough of low pressure at the confluence of the trade winds which moves north and south roughly parallel to the equator with the seasonal change in the winds.
Industry:Agriculture
Also called allozyme. An enzyme which exists in multiple electrophoretic forms either because of allelic variation within one polypeptide or multimeric associations of variant forms. Similar or identical catalytic activities occur within the same organism.
Industry:Agriculture
CMS or restorer lines differing in nuclear genetic constitution but having a common cytoplasm.
Industry:Agriculture
Generally a 21-day difference in flowering is sufficient in the case of rice.
Industry:Agriculture
1). The growing into pure culture in artificial/synthetic medium of pathogenic microorganisms. 2). The separation of one group of plants from another so that fertilization between or among groups is prevented. Separation between two hybrid seed production plots can be provided by topographic surface features or artificial/natural barriers, to the height of at least 2.5 m., in the case of rice.
Industry:Agriculture
1). A single spore or culture and the subculture derived from it. Also used to indicate collections of a pathogen made at different times and/or space. 2). To remove or separate an individual sample from a given sample population.
Industry:Agriculture
