Photosynthesis & yield of maize


photosynthesis of maize under small holder farmers, aim at quantifying the effect sole and double-up legume on photosynthesis of subsequent maize


The One v3.0 (Phi2, NPQt, using Multi-Phase Flash)

The One Protocol to rule them all! Phi2, NPQt combined.

Changes from previous The One protocol: - Removed the Phi1 measurement, which was producing a lot of invalid data (removed by Dan and Frank) - Implemented the multi-phase flash protocol created by Tom Avenson

Chlorophyll content (SPAD) III

REQUIREMENTS: Firmware v0.41 or higher. Measures transmission at 940nm and 650nm in order to determine the 'greenness' of a leaf, an indicator of chlorophyll content and nitrogen content. The 940 is used to account for leaf thickness. Improvements over Chlorophyll content (SPAD): - performs 3 different spads at 3 intensities for thin and thick ...


  1. EPA (Multiple Choice)
  2. Treatment (Multiple Choice)
  3. Farmers name (Short Answer)
  4. weeks after planting (Short Answer)
  5. position of the leaf (Multiple Choice)



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