Sir: Land (soil) is an important resource as it is the basis for the growth of producers. In the recent times, soil has been subjected to pollution. The pesticides used in agriculture have chemicals that stay for long times. The acid rains change the pH of soil making it unsuitable for cultivation. The household and other city garbage lies scattered in soil in the absence of proper disposal systems. Materials like polythene block the passage of water into soil and so decrease the water holding capacity of soil. Many industries produce harmful chemicals which are disposed off without being treated properly. Improper disposal of nuclear waste also causes radioactive substances to remain in soil for a long time. Open latrines in villages and some parts of cities are also the source of land pollution. DEENA MANZOOR Via Email Published in Daily Times, September 18th 2018.