Many sensors are available for agriculture, including the following :
Airflow - Measures soil's air permeability.
Acoustic - Measures the level of noise from pests.
Chemical - Measures levels of a specific chemical, such as ammonium, potassium or nitrate, or measures such conditions as pH levels or presence of a specific ion.
Electrochemical - Measures the nutrients within the soil.
Humidity - Measures the moisture within the air, such as in a greenhouse.
Soil moisture - Measures the wetness of the soil.
Electromagnetic - Measures the soil's ability to conduct electrical charge, which can be used to determine characteristics such as water content, organic matter or degree of saturation.
