Aerifying larger lawns requires a power-driven core aerator or aerifier, which can be rented at lawn and garden supply centers. The working parts of these machines are spoon-shaped tines or hollow tubes. As the tubes are driven into the lawn, cores of soil are removed from the ground and strewn across the lawn.
Nutrients with the Highest Energy Density. Fat provides more calories than any other nutrient. The macronutrients -- fat, protein and carbohydrates -- are high in energy density, which means that they have 4 or more calories per gram. The other essential nutrients -- water, vitamins and minerals -- have no calories, so they provide no energy.
Your body requires six essential nutrients: fat, proteins, carbohydrates, vitamins, minerals and water; however, it can't produce these nutrients independently, so you have to consume them through your diet. Nutrient Classifications. The macronutrients -- fats, proteins and carbs -- provide the majority of our energy. Vitamins and minerals, which include iron and calcium, are considered micronutrients because we require them in much smaller quantities. A varied diet is the best way to get all essential nutrients.