In one sentence, describe what the following article is about: to determine which additive you need. The most common way to add calcium to soil is to use a soil additive. The two most common soil additives to raise calcium levels are lime and gypsum. Before choosing one, test your soil’s pH to figure out which one will work best for your needs.  If you need to raise your pH, use lime.  If you need your pH to remain stable, use gypsum. You can buy gypsum or lime at most gardening supply stores. For instance, you will usually be able to find them in the gardening section of stores like Home Depot and Lowes. You can also buy them online from Amazon and other stores. If you need to spread just a bit of additive, use your hands (just make sure you wash them before touching anything else!). But if you are trying to cover a larger area you may want to use a fertilizer spreader to be more efficient.  The amount of additive you need to apply will depend largely on your needs and your soil pH level. Research your needs before determining the amount you want to use.  If you are using lime, till it into the soil so that it mixes in thoroughly.  If you are using gypsum, spread it over the surface of the soil and then water it in until the soil absorbs it. You might only need to add more lime or gypsum once every year, but keep a close eye on your soil to determine how often you need to add calcium. If your soil is used to produce large amounts of crops, for instance, you may need to add calcium more frequently.
Summary: Test your soil's pH level Buy soil additive from a gardening supply store. Spread additive using a lime or fertilizer spreader. Monitor soil and reapply additive annually or as needed.

In one sentence, describe what the following article is about: Set up the letter as a standard business letter. However, also include a heading, such as the words “Final Demand.” Put the words in bold and underline them. You want the recipient to know that this is their last chance to pay up before you take additional action. You should tell the customer that they are now in breach of your agreement and that you have added interest or a penalty for being late. Then tell them the new total amount they need to pay. Sample language could read: “Despite previous reminders, your account remains delinquent. Because you are now in breach of our payment terms, we are adding a $50 late payment penalty per our ‘Late Payment of Debts Terms of Agreement.’ The total outstanding debt is now $225.00.” You should tell the customer how much time they have to make final payment. You should not give them too much time. For example, you could set a 72-hour deadline. Explain what will happen if the customer doesn’t meet the deadline. For example, you might pass the account onto collections or sue the customer in court.  Sample language could read: “It is now crucial that you pay your outstanding bill in full within the next seventy-two hours. If you don’t, then we will have little choice but to pass this account to our debt collection agency, who will add more charges to the account.”  You can bold the “seventy-two hours” to make those words stand out. Emphasize that the client should take this final demand letter seriously and pay up. For example, you could write, “We therefore suggest that you take this matter seriously and pay your balance in full as soon as possible.” You should send this one through the post, using certified mail, return receipt requested. If you don’t hear back from the customer, then go ahead and send the account to collections or sue—whichever you threatened in the letter.
Summary:
Identify the letter as your final demand. Explain late fees. Give a deadline. Conclude your letter. Mail the letter.