Please choose the correct ending to complete the given sentence: Home and Garden: [header] How to choose organic fertilizer [title] Test your soil. [step] In order to choose the right organic fertilizer for your garden, you need to know the composition of your existing soil. There are a variety of tests that you can do, such as tests for ph, nitrogen, and phosphorus.

Ending1: Look for a soil mix with a high nitrogen content. The ph of the soil needs to be the exact ratio of nitrogen and phosphorus in your soil, which should be determined by test results. Ending2: Since nitrogen is normally the highest fertilizer for your garden, you may want to balance out this with the amount you find the most beneficial, usually based on your climate. [substeps] Ask a local farmer to tell you about the soil composition of your vegetables and grass. Ending3: Each test will have a unique set of numbers and attributes that you must factor into your soil. [substeps] Keep in mind that the ingredients used in those tests vary from crop to crop, so do some math to find the recommended potency and saturation for your soil. Ending4: These will let you know the status of different components of your soil. [substeps] Soil test kits for specific aspects of your soil are available at garden supply centers.

Answer format: ending1/ending2/ending3/ending4