Making Measurements with the LAI-2000

Measurements are made by positioning the optical sensor and pressing a button; data are automatically logged into the control unit for storage and LAI calculations. Multiple below-canopy readings and the fish-eye field-of-view assure that LAI calculations are based on a large sample of the foliage canopy. After collecting above-canopy and below-canopy measurements, the control unit performs all calculations and the results are available for immediate on-site inspection.

There are three operating modes you can use, depending on the type of canopy you want to measure:

One Sensor Mode: Requires one LAI-2050 Optical Sensor connected to the LAI-2070 Control Unit. It works best for short canopies where it is convenient to place the sensor above the foliage.

Two Sensor Mode: Requires two LAI-2050 Optical Sensors connected to the LAI-2070 Control Unit. One sensor is dedicated for above-canopy readings and the other sensor is dedicated for below-canopy readings. It works best for tall canopies, which require multiple measurements that may be affected by changing sky conditions.

Remote Mode: Requires two LAI-2050 Optical Sensors and two LAI-2070 Control Units. One set is dedicated for above-canopy readings and the other set is dedicated for below-canopy readings. It works best for very tall canopies (i.e. forest), which require multiple measurements that may be affected by changing sky conditions.

Though it is preferable to use the LAI-2000 on a cloudy day, it is possible to use it during a clear day if you take some precautions. Working at sunrise or sunset or using a view cap (included with the LAI-2000) to block the optical sensor from seeing the sun are the best solutions. Contact LI-COR for more information on how to use the LAI-2000 during sunny days.