Skip to main content

Natural soil

 Natural soils are influenced by rainfall and temperature,heavy rain causes the soil to become leached. High temperatures increase the rate of decomposition of organic matter in the soil, thereby lowering its humus content. Thus, climatic conditions tend to produce poor soils in the tropics and rich soils in the temperate regions. Besides climate and vegetation, the parent rock material also contributes to the quality of the soil. For example volcanic rocks tend to produce fertile soils.
   Laterite, a red soil which is a product of leaching, is commonly found in the tropics. It is composed mainly of iron and aluminium compounds,and poor in humus and essential plant nutrients, such as phosphorus, nitrogen and potassium. The black and brown soil of the temperate grasslands are the world's richest soils, with a high mineral and humus content. The light coloured desert soils tend to be very rich in minerals but have a low humus content.
   Mainly the soils are generally poor. Lateritic soils are widespread especially in the Guinea and Sudan savanna belts. The soils of the coastal regions are sandy or alluvial. These soils are also leached. The rain forest soils quickly lose their fertility under cultivation. In fact, the rain forest are a result of climatic conditions, not soil fertility. The brown soil of the north,Kano in Nigeria, are relatively rich and intensive agriculture is practised in these regions.

Comments

Post a Comment

Popular posts from this blog

READING AND UNDERSTANDING

All reading is geared to understanding. There would be no point in reading if we did not understand what we are reading. However there are many different obstacles in the way of easy understanding of a passage. It is your task as a reader to actively seek to break down the barriers to understanding.    One block to understanding is caused by references in the passage to things that are outside it. Pronoun are the first examples of words that refer to people and objects. Sometimes, it is easy to follow the reference at other times, it is more difficult. Look at the opening sentence of the passage you've just read that begins this way  "She was waiting for us:small, dowdy, dirty..."  Who was waiting? Who was the person waiting for? (Perhaps you would also like to know why she was waiting.)Answers to these questions will surely help you to understand and thus follow the reference. The first thing to do is to ask questions like the ones we have just asked and to read t...
Post a Comment
Read more

Experiencing grief

Grief is a natural response to loss. It’s the emotional suffering you feel when something or someone you love is taken away. The more significant the loss, the more intense your grief will be. Grieving is a highly individual experience; there’s no right or wrong way to grieve. How you grieve depends on many factors, including your personality and coping style, your life experience, your faith, and how significant the loss was to you. Inevitably, the grieving process takes time. Healing happens gradually; it can’t be forced or hurried—and there is no “normal” timetable for grieving . Some people start to feel better in weeks or months. For others, the grieving process is measured in years. Whatever your grief experience, it’s important to be patient with yourself and allow the process to naturally unfold. Emotional symptoms of grief Shock and disbelief. Right after a loss, it can be hard to accept what happened. You may feel numb, have trouble believing that the loss really happen...
Post a Comment
Read more