Soil Hardness Tester ( Takemura Model: SHM-1)
REFERENCES:
* The range in which root grows fully and becomes acive is under 20 mm. The range in which roots quality as products can be maintained is under 18 mm
* Soil over 29 mm is prescribed as hard soil layer
* Soil of 15 mm is considered to be a perfectly safe value when large sized machines are introduced
METER INDICATIONS:
* 0-40 MM * 0 - 500 kgs / cm²
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