  Before it rains, if using granular fertilizer, so that it will melt into the soil and become available for use by the plant roots.....IF you are using liquid fertilize â¦ r you would apply it either on the leaves, or by drenching the soil around the plant at least 24 hours before a rain occurs. Before it rains, if using granular fertilizer, so that it will melt into the soil and become available for use by the plant roots.....IF you are using liquid fertilize â¦ r you would apply it either on the leaves, or by drenching the soil around the plant at least 24 hours before a rain occurs.
A Chemical change may also cause a physical change; a physical change alone cannot lead to a chemical change. 3. A Physical change is superficial and can possibly be reversed; a chemical change is complete and permanent.
A chemical change makes a substance that wasn't there before. There may be clues that a chemical reaction took places, such as light, heat, color change, gas production, odor, or sound. The starting and ending materials of a physical change are the same, even though they may look different.