Nitrogen (n) element in the growth of crops play a very important role in the process.

For growers, known crop nitrogen demand, you can control the supply of nitrogen in the right quantity.

Experiments showed that the SPAD series on the premise of guaranteeing crop production is not reduced, can help reduce 10% nitrogen.

Nitrogen fertilizer amount of control to the best in your field, can reduce excessive use of nitrogen fertilizers and could cause plant diseases and environmental pollution.

Have more and more people are beginning to realize that excessive use of nitrogen fertilizers for Lake water and groundwater pollution and began to recognize the importance of appropriate use of nitrogen fertilizers.

Nitrogen fertilizer application technology evolving now and in the future, SPAD series products are playing an increasingly important role.

SPAD-502Plus by measuring leaf on two wavelengths of the absorption rate, to assess the current relative content of chlorophyll in the leaves. The following figure shows two sample rate of the absorption spectrum of chlorophyll in the leaves.

As can be seen from the diagram, the chlorophyll in the blue area (400-500nm) and the red area (600-700nm) within the absorption reaches the peak, but not on the near infrared absorption.

The absorption characteristics of chlorophyll, SPAD-502Plus measure leaves in the red and near infrared region of the absorption rate. In these two parts of absorption rate, to calculate a SPAD values, it is indicated by a number current and parameters that correspond to leaf chlorophyll content.

Detecting crop nutrition

Medium associated with current nutritional status of crop chlorophyll content. You can see from the figure below, the chlorophyll content (using SPAD-value) and the nitrogen content of leaves (an important nutrient) is proportional to growth. For a particular crop, higher index of SAPD, represents the healthier crops.

Trend display: measurement of multiple sets of trend data is displayed in the diagram, those differences can be found at a glance data, to get attention and analysis.

Lightweight, easy to carry: the SPAD-502Plus has a compact body, 200g weight, can easily fit in your pocket and take to the field measurements.

Measure quickly and easy: measurement, you only need to insert the blade and close the detector without blade cut, so that you can crop grown throughout to monitor specific blades, resulting in more scientific analysis.

Water resistant: SPAD-502Plus water resistant (IPX-4), even on rainy days, also in outdoor measurements.

* Do not immerse the instrument in water or water for cleaning the instrument directly.

Low battery consumption: SPAD-502Plus use a LED light source, can greatly reduce the consumption of batteries, a set of 2 AA batteries, and can be measured approximately 20,000 times.

Small measuring area: measuring only 2 x 3mm, even a small blade, can also be measured. Moreover, the depth adjustment device can make a small blade or precise positioning measurements.

High precision: high accuracy (± 1.0 SPAD) measurements, even if growing conditions similar to crop classification can also be measured and analyzed.

Data storage: SPAD-502Plus can be stored in memory up to 30 sets of measurement data, and recent data can be deleted or restored, in addition, the instrument can also automatically calculates the average of all the data for reference.

Reading test: reading test allows customers to check if the SPAD-502Plus is working to ensure that always get an accurate measurement data.