Please choose the correct ending to complete the given sentence: Home and Garden: [header] How to prepare soil for the application of fertiliser [title] Send a sample of soil to a local cooperative extension. [step] Collect a sample of your soil by digging a couple of holes that are 5-6 inches (13-15 cm) deep. Then, store the soil in an airtight plastic container or sealable bag and send it to the cooperative extension for tests.

Ending1: They will evaluate the soil and give you recommendations for amendments and fertilizers. [substeps] Cooperative extension offices test and study agriculture and the environment and can be found at certain universities. Ending2: The cooperative extension will evaluate the nitrogen and phosphate levels in your soil. It will ask you to identify levels of phosphorus and potassium values, ammonium and potassium. Ending3: You will not be able to test the soil until you report that you have entered the soil beyond the very first threshold. See submit your test results within 1 week or 2 weeks of the sample being sent. Ending4: [substeps] You can also have your sample digitized to reflect the gfci's criteria. [title] Test your soil type using soil testing kits.

Answer format: ending1/ending2/ending3/ending4