Sentence examples for sampling must be from inspiring English sources

Sampling must be performed in early summer (around June and July), not too long after peak pesticide application.

If the only data available are VGI obtained from a non-probability sample, properties of design-based inference that are ensured by probability sampling must be replaced by assumptions that may be difficult to verify.

Where effective ranges are short, sampling must be dense to reveal the spatial variation and be expensive, and variable-rate application of fertilizer is likely to be impracticable and almost certainly not cost-effective.

More frequently-conducted household surveys such as household budget surveys (HBS) and labour force surveys (LFS) are valuable alternatives to censuses, but additional care in sampling must be taken to ensure that information on relatively rare events such as migration can be captured without compromising the statistical validity of results (Makaryan, 2012).

To increase the availability of biodiversity information, identifications, station data and physical data recorded at time of sampling must be linked and made available to the larger scientific community as quickly as possible.

However, the optimal intervals between fecal sampling must be determined individually [ 24, 29].

Under the settlement overseen by a federal court in San Antonio, the samples must be destroyed by early next year.

To be suspended for using a performance-enhancing drug, the positive result for Landis's first sample must be corroborated by testing a second sample.

In other words, if there is a treatment system in place, the sample must be taken before the water goes through treatment.

But to know what has actually been in the air, samples must be removed from the unit periodically and taken to a laboratory for genetic testing.

The sample must be produced in a controlled facility and be done within 90 minutes after the athlete has been told about the test.