David LeBauer edited unit conversions.md  almost 10 years ago

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**Table \ref{tab:conversions}: Useful conversions for entering site, management, yield, and trait data \label{tab:conversions}**  | From (\(X\)) ($X$)  | to (\(Y\)) ($Y$)  | Conversion | Notes | |:-----------|:---------|:-----------|:------|  | \(X_2=\)root $X_2=$root  production | \(X_1=\)root $X_1=$root  biomass & root turnover rate | \(Y $Y  = X_2/X_1\) X_2/X_1$  | Gill [2000] | | DD\(^{\circ}\) DD$^{\circ}$  MM'SS | XX.ZZZZ | \(\textrm{XX.ZZZZ} $\textrm{XX.ZZZZ}  = \textrm{XX} + \textrm{MM}/60+\textrm{SS}/60\) \textrm{MM}/60+\textrm{SS}/60$  | to convert latitude or longitude from degrees, minutes, seconds to decimal degrees | | lb | kg | \(Y=X\times 2.2\) $Y=X\times 2.2$  | | | mm/s | \(\mu\) $\mu$  mol CO\(_2\) m\(^{2}\) s\(^{-1}\) CO$_2$ m$^{2}$ s$^{-1}$  | \(Y=X\times 0.04\) $Y=X\times 0.04$  | | | m\(^2\) m$^2$  | ha | \(Y $Y  = X/10^6\) X/10^6$  | | | g/m\(^2\) g/m$^2$  | kg/ha | \(Y=X\times 10\) $Y=X\times 10$  | | | US ton/acre | Mg/ha | \(Y $Y  = X\times 2.24\) 2.24$  | | | m\(^3\)/ha m$^3$/ha  | cm | \(Y=X/100\) $Y=X/100$  | units used for irrigation and rainfall | | % roots | root:shoot (q) | \(Y=\frac{X}{1-X}\) $Y=\frac{X}{1-X}$  | \(\% $\%  \text{roots} = \frac{\text{root biomass}}{\text{total biomass}}\) biomass}}$  | | \(\mu\) $\mu$  mol cm\(^{-2}\) s\(^{-1}\) cm$^{-2}$ s$^{-1}$  | mmol m\(^{-2}\) s\(^{-1}\) m$^{-2}$ s$^{-1}$  | \(Y $Y  = X/10\) X/10$  | | | mol m\(^{-2}\) s\(^{-1}\) m$^{-2}$ s$^{-1}$  | mmol m\(^{-2}\) s\(^{-1}\) m$^{-2}$ s$^{-1}$  | \(Y $Y  = X/10^6\) X/10^6$  | | | mol m\(^{-2}\) s\(^{-1}\) m$^{-2}$ s$^{-1}$  | \(\mu\) $\mu$  mol cm\(^{-2}\) s\(^{-1}\) cm$^{-2}$ s$^{-1}$  | \(Y $Y  = X/ 10^5\) 10^5$  | | | mm s\(^{-2}\) s$^{-2}$  | mmol m\(^{-3}\) s\(^{-1}\) m$^{-3}$ s$^{-1}$  | \(Y=X/41\) $Y=X/41$  | Korner et al. [1988] | | mg CO\(_2\) g\(^{-1}\) h\(^{-1}\) CO$_2$ g$^{-1}$ h$^{-1}$  | \(\mu\) $\mu$  mol kg\(^{-1}\) s\(^{-1}\) kg$^{-1}$ s$^{-1}$  | \(Y $Y  = X\times 6.31\) 6.31$  | used for root_respiration_rate | | \(\mu\) $\mu$  mol | mol | \(Y= $Y=  X\times 10^6\) 10^6$  | | | julian day (1--365) | date | | see ref: http://disc.gsfc.nasa.gov/julian_calendar.shtml (NASA Julian Calendar)  | spacing (m) | density (plants m\(^{2}\)) m$^{2}$)  | \(Y=\frac{1}{\textrm{row $Y=\frac{1}{\textrm{row  spacing}\times\textrm{plant spacing}}\) spacing}}$  | | | kg ha\(^{-1}\) y\(^{-1}\) ha$^{-1}$ y$^{-1}$  | Mg ha\(^{-1}\) y\(^{-1}\) ha$^{-1}$ y$^{-1}$  | \(Y= X/1000\) $Y= X/1000$  | | | g m\(^{-2}\) y\(^{-1}\) m$^{-2}$ y$^{-1}$  | Mg ha\(^{-1}\) y\(^{-1}\) ha$^{-1}$ y$^{-1}$  | \(Y= X/100\) $Y= X/100$  | | | kg | mg | \(Y=X\times 10^6\) $Y=X\times 10^6$  | | | cm\(^2\) cm$^2$  | m\(^2\) m$^2$  | \(Y=X\times 10^4\) $Y=X\times 10^4$  | |