This is a more-reliable PVC coupling that will resist loosening from vibration or from weather exposure and temperature changes. The instructions and more details about this example of a more-reliable PVC coupling are at PVC COMPRESSION FITTING Griploc Spring-lock[PDF] Spears Manufacturing, 15853 ...
make sure to really turn your soil over before planting so the sun can get to it. Exposure to the sun (and hot, dry weather in general) will kill this pathogen. Also keep in mind that it thrives in acidic soil, so adjusting it to be more neutral may be beneficial as well. ...
Therefore, from the toxin data, it is unclear what is the causing agent, and even when we know the causing agent, the actual toxin contamination cannot be predicted. The number of toxins is now significantly higher; a number of masked and other toxins were identified with very high toxicity...