- 行业: Agriculture
- Number of terms: 29629
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A measure of dispersion which is the mean of the squares of deviations of the observations from the population mean. Estimated as the ratio of a sum of squares to the corresponding number of degrees of freedom.
Industry:Agriculture
Data or some characteristics that show variability. The characteristic may be numerical (quantitative) or non-numerical (qualitative).
Industry:Agriculture
Rice grown on both level and sloping fields that are not bunded, that are prepared and seeded under dry conditions, and that depend on rainfall for moisture (without surface water accumulation).
Industry:Agriculture
A rainfed land area with no levees or dikes surrounding it to impound water; sowing is by direct seeding.
Industry:Agriculture
