Optimal nitrogen (N) management is essential for profitable vegetable crop production and
to minimize N losses to the environment that are a consequence of an excessive N supply …

Improvements of nitrogen use efficiency (NUE) may be achieved through the use of sensing
tools for N status determination. Leaf and canopy chlorophyll, as well as leaf polyphenolics …

The nitrogen fixing ability of common bean (Phaseolus vulgaris L.) in association with
rhizobia is often characterized as poor compared to other legumes, and nitrogen fertilizers …

Over the last decade, technological developments have made it possible to quickly and
nondestructively assess, in situ, the chlorophyll (Chl) status of plants. We evaluated the …

Some red edge parameters in the first derivative reflectance curve (wavelength, amplitude
and area of the red edge peak) were studied to evaluate plant chlorophyll content …

Use of leaf meters to provide an instantaneous assessment of leaf chlorophyll has become
common, but calibration of meter output into direct units of leaf chlorophyll concentration has …

Relationships between chlorophyll concentration ([chl]) and SPAD values were determined
for birch, wheat, and potato. For all three species, the relationships were non-linear with an …

In situ optical meters are widely used to estimate leaf chlorophyll concentration, but non‐
uniform chlorophyll distribution causes optical measurements to vary widely among species …

Leaf chlorophyll content (LCC) is an indicator of leaf photosynthetic capacity. It is crucial for
improving the understanding of plant physiological status. SPAD meters are routinely used …

There is an increasing need for diagnostic tools that can assess the crop nitrogen (N)
nutrition status during the growth cycle. In addition to the leaf chlorophyll (Chl) content, we …