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\(^2\)  | $Y=X\times 10^4$ \(Y=X\times 10^4\)  | |