How to manage soil health in polyhouses

Different types of fertilizers are used continuously throughout the year in poly houses / greenhouses.
For this reason, the health of the polyhouse soil starts to deteriorate within 3-4 years. Despite good seeds, proper nutrients and all precautions, there can be a huge decrease in the yield and quality of the crop.
Therefore, it is necessary that in order to do scientific farming, farmers should constantly examine the health of the soil and maintain complete information about it.
Correct sampling is very important for soil testing.
The sample is taken from different locations inside the polyhouse/greenhouse. Then it is mixed well and divided into four parts.
Repeat this process until the remaining sample weighs half a kilogram.
The samples obtained in this way are sent to the testing center. And according to the report farm fertilizer is used.