Products and services using Air & soil sensors are generally available around 2015
Grader A: hit
Grader B: hit
agrees with A, without seeing its verdict
Audit: confirmed
in the fixed audit sample (D11)
Published: hit
Grader A: hit
Commercial soil moisture sensors with wireless loggers (Decagon EC-5, 5TM, Em50R) were sold and deployed on irrigated fields by 2013; weather stations were routine farm equipment.
Test: D37 Horizons: farm environmental sensor products buyable by ordinary farms by 2017 (earlier counts).
Grader B: hit
Commercial soil-moisture probes (Decagon/METER, Sentek) and farm weather stations (Davis) were sold long before 2015.
Test: Such sensors could be bought by farmers by 2017 (earlier counts).