However, salary varies widely based on location, type of work environment, and level of training and job experience. Medical assistant salary also depends on the specific job description, as medical assistants can perform many different duties.
Soil pH and Fertilizer. Keep the soil pH more acidic, around 6.0 to 6.5. You can test the soil pH every few growing seasons and add dolomite limestone to raise the pH if necessary. You can add sulfur to lower the pH. When growing grapefruit in Florida, fertilize the trees three times a year with a citrus fertilizer; in California, only add nitrogen. Your best bet is to have the soil around the root base tested to make sure your grapefruit tree has all the nutrients it needs.
Mature citrus trees need three applications of fertilizer spread throughout the year. Fertilizer should be applied in winter, late spring and late summer. An easy way to remember when it's time to fertilize citrus trees is by the holidays Valentine's Day, Memorial Day and Labor Day. Macronutrients. Citrus trees need nitrogen, phosphorus and potassium, which are called macronutrients. They are often referred to as NPK. Of these macronutrients, nitrogen is the most important for a healthy tree and a good citrus crop.