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| gs (stomatal conductance) | \(A_{max}\) | see notes in caption |  | stomatal\_slope (m) | humidity, temperature | specific humidity, assume leaf T = air T |       **Table 9: Useful conversions for entering site, management, yield, and trait data**  | From (\)X\() | to (\)Y\() | Conversion | Notes |  |:-----------|:---------|:-----------|:------|  | \(X_2=\)root production | \(X_1=\)root biomass & root turnover rate | \(Y = X_2/X_1\) | Gill [2000] |  | DD\(^{\circ}\) MM'SS | XX.ZZZZ | \(\textrm{XX.ZZZZ} = \textrm{XX} + \textrm{MM}/60+\textrm{SS}/60\) | to convert latitude or longitude from degrees, minutes, seconds to decimal degrees |  | lb | kg | \(Y=X\times 2.2\) | |  | mm/s | \(\mu\) mol CO\(_2\) m\(^{2}\) s\(^{-1}\) | \(Y=X\times 0.04\) | |  | m\(^2\) | ha | \(Y = X/10^6\) | |  | g/m\(^2\) | kg/ha | \(Y=X\times 10\) | |  | US ton/acre | Mg/ha | \(Y = X\times 2.24\) | |  | m\(^3\)/ha | cm | \(Y=X/100\) | units used for irrigation and rainfall |  | % roots | root:shoot (q) | \(Y=\frac{X}{1-X}\) | \(\% \text{roots} = \frac{\text{root biomass}}{\text{total biomass}}\) |  | \(\mu\) mol cm\(^{-2}\) s\(^{-1}\) | mmol m\(^{-2}\) s\(^{-1}\) | \(Y = X/10\) | |  | mol m\(^{-2}\) s\(^{-1}\) | mmol m\(^{-2}\) s\(^{-1}\) | \(Y = X/10^6\) | |  | mol m\(^{-2}\) s\(^{-1}\) | \(\mu\) mol cm\(^{-2}\) s\(^{-1}\) | \(Y = X/ 10^5\) | |  | mm s\(^{-2}\) | mmol m\(^{-3}\) s\(^{-1}\) | \(Y=X/41\) | Korner et al. [1988] |  | mg CO\(_2\) g\(^{-1}\) h\(^{-1}\) | \(\mu\) mol kg\(^{-1}\) s\(^{-1}\) | \(Y = X\times 6.31\) | used for root_respiration_rate |  | \(\mu\) mol | mol | \(Y= X\times 10^6\) | |  | julian day (1--365) | date | | see ref: http://disc.gsfc.nasa.gov/julian_calendar.shtml (NASA Julian Calendar)  | spacing (m) | density (plants m\(^{2}\)) | \(Y=\frac{1}{\textrm{row spacing}\times\textrm{plant spacing}}\) | |  | kg ha\(^{-1}\) y\(^{-1}\) | Mg ha\(^{-1}\) y\(^{-1}\) | \(Y= X/1000\) | |  | g m\(^{-2}\) y\(^{-1}\) | Mg ha\(^{-1}\) y\(^{-1}\) | \(Y= X/100\) | |  | kg | mg | \(Y=X\times 10^6\) | |  | cm\(^2\) | m\(^2\) | \(Y=X\times 10^4\) | |