The phrase "less effort has been made" is grammatically correct and can be used in written English.
It is typically used to indicate that a task or action did not receive as much effort as was expected or required. Example: Despite our best efforts, less effort has been made towards reducing carbon emissions than we had hoped.
However, much less effort has been made on developing ultra-high-throughput and cost-effective genotyping platforms for applied breeding programs.
Although considerable effort has been dedicated to offline analysis for improving signal detection and translation, far less effort has been made to conduct online studies with target populations.
Construction of Chinese country parks has been developing quickly in recent years, but less effort has been made in the field of esthetic quantitative evaluation of landscape of the country parks.
There has been much interest in applying techniques that incorporate knowledge from unlabelled data into a supervised learning system but less effort has been made to compare the effectiveness of different approaches and to analyse the behaviour of the learning system when using different ratios of labelled to unlabelled data.
Now they are detained until they can be deported, while Mexicans are sent straight back to Mexico.Less effort has been made to punish firms that employ illegals.
Due to this, less effort has been made to investigate the electrical properties of h-BN.
Less efforts have been made in measurements of covering rough sets.
However, relatively much less efforts have been made to address those proteins which may simultaneously exist at, or move between, two or more different subcellular locations.
Some effort has been made to include less conventional sacred sites -- graves, gardens and one or two spots of natural and artistic inspiration.
Thus far, considerable effort has been made to control false positives, but less effort has gone into minimizing false negatives.
Great effort has been made to reduce CO2 emissions.
