Use Net Photosynthesis Rate when you need to compute the net photosynthesis rate in micromoles of carbon dioxide per square metre per second from uptake and leaf area. Enter CO2 uptake and Leaf area using the definitions and units below so the result can be reproduced.

CO2 uptake

A finite measured or assumed value greater than or equal to 0, expressed in µmol/s.

Leaf area

A finite measured or assumed value, expressed in m².

The published tool contract uses this rule: Compute the net photosynthesis rate in micromoles of carbon dioxide per square metre per second from uptake and leaf area.

Net photosynthesis rate

The calculated net photosynthesis rate in µmol/m²/s.

The calculation does not propagate measurement uncertainty, sampling error, or biological and chemical variability.

Retain the original CO2 uptake and Leaf area values and their units alongside the result. Net Assimilation Rate is useful when you instead need to compute the simplified net assimilation rate in grams per square metre of leaf per day as dry mass gain divided by average leaf area times elapsed days. Transpiration Rate provides another view by helping you compute the transpiration rate in millimoles of water per square metre per second from water loss and leaf area.

• Net Assimilation Rate

  Compute the simplified net assimilation rate in grams per square metre of leaf per day as dry mass gain divided by average leaf area times elapsed days.

• Transpiration Rate

  Compute the transpiration rate in millimoles of water per square metre per second from water loss and leaf area.

• Crop Growth Rate

  Compute crop growth rate in grams per square metre of ground per day as standing dry mass gain divided by ground area times elapsed days.