• METHODS OF REPLENISHING LOST NUTRIENTS
    AGRICULTURAL SCIENCE

    METHODS OF REPLENISHING LOST NUTRIENTS

    Different methods are used by farmers to maintain the fertility of the soil or replace lost nutrients. These methods include: Crop rotation. Organic manuring. Bush fallowing. Cover cropping. Liming. Inorganic manuring or Fertilizers.   a) Crop Rotation Crop rotation is defined as the planting of different types of crops on the same piece of land in a definite sequence. In other words, it is a system of farming whereby different crops are grown on the same piece of land year after year in a definite manner so as to maintain the fertility of the soil. The cycle is planned in such a way as to restore nutrients removed from the…

  • THE EARTH’S ROTATION AND REVOLUTION
    PHYSICAL GEOGRAPHY

    THE EARTH’S ROTATION AND REVOLUTION

    The earth moves in space in two different ways. These are: Rotation Revolution   ROTATION OF THE EARTH Rotation of the earth is defined as the movement of the earth round the sun on its axis. The earth moves or rotates on its axis from west to east. The rotating earth is inclined at an angle of 23 1/2°along its axis. It takes the earth twenty-four hours (i.e. a day) to complete one rotation (i.e. the earth rotates through 360° in every 24 hours). The rotation of the earth causes day and night. This is why it is said that there are twenty-four hours in a day. That is, twelve…

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