Use a shovel to dig into the soil, and grab a handful of it. See what the soil seems to be made up of. It might be sandy or have a lot of clay, or it may be good rich dirt. Soil with too much sand or clay will not usually grow garden plants very well. The soil should feel fluffy, like it is full of air, because this means it gets plenty of oxygen. This is also a good time to see if there are lots of worms and insects in the soil, as this usually means the soil is fairly rich. Depending on what the soil is like in your area, you can add soil amendments later to get it to the proper makeup. Generally, dark brown or nearly black soil is best because it tends to mean the soil has a lot of decomposing organic matter and is rich in nutrients. Pale brown or nearly yellow soil tends to be less nutrient rich. You can get a better understanding of the makeup of your soil by taking samples from several places. Place the samples in a mason jar and mix them together. When the soil settles, you'll be able to better see the soil's makeup. . For the best results, take a sample of the soil to a garden store or county extension office so they can test it to see what nutrients are lacking, and see what the pH level is. You can also buy a home test kit, but this will not be quite as thorough. Ideal pH for most vegetable plants is around 6.0-7.5. Adding lime is a common way to adjust the pH of soil, but it is a long process that take about six months to fully take effect in the soil. You can make up for other lacking nutrients with fertilizer and compost, which will be discussed more later. When you are first starting a garden, especially if you're starting it at the beginning of Spring, you need to wait until the soil has dried out enough. If you squeeze a handful of the soil and it stays packed together, it's probably still too wet.] You can perform this test once a week or so until the soil is dry enough to begin garden preparation. Soil that has a high clay content will pack more, but this does not necessarily mean the soil is too wet.
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One-sentence summary -- Sample the soil makeup. Test for nutrients Evaluate how wet the soil is.

Article: Be careful not to bend or dent either slide in the process. Be gentle! If using a cleaning rod, be careful not to jam the rod into the bottom of the slide. If you are rough, you risk denting the crook at the end of the slide. However, this stage of the cleaning should really be handled by a trained instrument technician, as any sort of scratch or dent in the valve will adversely affect the playability of the horn. Special attention should be given to the rotary valve, water key (or spit valve), and the outer and inner slides. Most of the oil should be applied by dripping it in through the pipe where the bell section and playing slide meet, though a few drops may be applied to the rotary valve directly.
Question: What is a summary of what this article is about?
Disassemble the trombone by unscrewing the bell portion from the slide and removing the mouthpiece. Remove the outer slide and wipe off any excess grease, oil or moisture from the inner slides with a soft rag. Use a cleaning rod or a "snake" (a flexible rubber coated metal wire with a small brush on both ends), clean out any excess grease, oil or moisture from the insides of the outer and inner slides. Remove the main tuning slide from the bell portion and clean the inside with a "snake". Do the same for F attachment tuning slide if your trombone has the F attachment. If absolutely necessary, disassemble the rotary valve for the F attachment, rinse off each piece and wipe off excess oil or grease. Rinse all trombone components with warm water (NOT HOT, see warnings) in a shower or bath. Dry off all components with a soft rag, making sure that no large pockets of water remain in any of the tubing or in the rotary valve. Apply necessary grease to the tuning slides and attach them to the bell portion of the instrument. Reassemble the rotary valve and apply necessary oils. Apply necessary slide grease or oils to the inner slide. Wipe down the entire outside of the trombone using a soft rag.