Please choose the correct ending to complete the given sentence: Home and Garden: [header] How to use blood meal [title] Test your soil to see if it needs nitrogen. [step] Buy a simple soil test from your local nursery or garden center and use a sample of soil from your garden or plant container. Follow the test kit instructions to get accurate results.

Ending1: If you have any concerns, use the blood meal to determine whether or not the soil is actually nitrogen-rich. If it does not, contact your local nursery to find out more. Ending2: [substeps] Urine tests can tell you how much nitrogen a plant needs by looking for signs of nitrogen-deficiency (bv) levels. Colored urine tests are good because the test helps confirm a potential bv but not eliminates it in humans. Ending3: [substeps] For large grassy areas, test your soil at night. For a small area, test your soil in the morning. Ending4: The test will tell you the levels of nitrogen, phosphorus, and potassium. [substeps] For example, the test will tell you if there's a surplus of nitrogen, sufficient levels, a deficiency of nitrogen, or if it's completely depleted.

Answer format: ending1/ending2/ending3/ending4