medium · Act english
[1] The implementation of 'smart' irrigation systems can reduce agricultural water waste by up to 30 %. [2] These systems utilize soil moisture sensors to determine exactly when a crop needs hydration. [3] The first automated irrigation valves were patented in the 1930s but did not see widespread use for several decades. [4] By delivering water directly to the root zone, the systems also minimize evaporation losses compared to traditional spray methods.
Which choice best accomplishes the writer's goal of maintaining the paragraph's focus on the efficiency of modern technology?
- Deleted, because it introduces a historical tangent that is irrelevant to the discussion of soil moisture sensors and modern efficiency.
- Kept, because it highlights that the primary obstacle to irrigation efficiency has always been a lack of widespread commercial adoption.
- Kept, because it provides historical context that shows how long engineers have been working on the problem of water waste.
- Deleted, because it contradicts the claim in sentence [1] that modern systems are significantly more efficient than those of the past.
Sign up free to see the explanation and track your rank →
More Act english practice
- A box of old letters and photographs [sit] undisturbed in the corner of the attic for deca
- Anyone who wants to participate in the upcoming marathon [need] to register by the end of
- If the architect [was] more experienced, the structural issues would have been detected mu
- The automated system is designed to [at this point in time] monitor all sensors simultaneo
- The historian noted that the [past history] of the region was marked by frequent territori
- The marathon runner needs to [revert back] to his previous training schedule to recover fr
- The project was delayed [due to the fact that] the primary shipment of steel was lost in t
- The two companies decided to [collaborate together] on the development of the new propulsi