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.
Carefully planned nutrition must provide an energy balance and a nutrient balance. The nutrients are: 1  Proteins-essential to growth and repair of muscle and other body tissues. 2  Fats-one source of energy and important in relation to fat soluble vitamins.3  Carbohydrates-our main source of energy.4  Minerals-those inorganic elements occurring in the body and which are critical to its normal functions.he nutrients are: 1  Proteins-essential to growth and repair of muscle and other body tissues. 2  Fats-one source of energy and important in relation to fat soluble vitamins. 3  Carbohydrates-our main source of energy. 4  Minerals-those inorganic elements occurring in the body and which are critical to its normal functions.