Changes to Soil pH. If vinegar concentrates are added to the soil instead of being sprayed onto plant foliage, they kill weeds by lowering the soil pH to a level that cannot sustain the plants. Depending on the soil type and the weather, this acidifying effect can take from a few months to a year.
Engagement rate is the percentage of people who saw a post that liked, shared, clicked or commented on it. To see the engagement rate for your posts: 1  At the top of your Page, click Insights. 2  Click Posts. 3  Scroll down to All Posts Published.
Remember when Princeton researchers published a paper asserting that Facebook would lose 80 percent of its users by 2017, based on analyzing Google Trends data for Facebook searches? Everyone had a good laugh over that, not least of all Facebook, whose clever comeback used similar data to find that Princeton was in trouble. Yet a second study (Strong Regularities in Growth and Decline of Popularity of Social Media Services) by researchers Christian Bauckhage and Kristian Kersting of Germany's noted Fraunhofer Institute has reached a similar conclusion.