Sensing systems incorporated into harvesting machines that register and record amounts of harvests associated with specific portions of a planted field are called monitoring systems.

explanation:

b,bacteria convert nitrates

into nitrogen gas.

d,plants and animals take in

and use nitrogen compounds.

e,bacteria break down waste    

products and return nitrogen  

to the soil.

a,bacteria convert atmospheric

nitrogen to ammonia.

c,bacteria convert ammonia

to nitrites and nitrates.

if you know your abc's you should be able to get your answer or just use google

d. changes in climate and historical records

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