WORLD MINERAL RESOURCES :- Minerals constitute one of the most valuable natural resources. They play an important role in our lives and without them it would be impossible to maintain the present standards of living in most parts of the civilised world. Most minerals are associated with igneous and certain highly matamorphosed rocks. Generally speaking, metals are found in veins and other de...

CEREALS RICE :- Rice (Oryza sativa) is primarily a crop of the Tropics and sub-stropics. It is the chief food of about half the world's population. Climate : It requires temperatures of over 22 °C during the growing season and over 26°C at the time of ripening. It thrives very well in plenty of bright sunshine and water. Abundant rainfall, ranging from 150 to 200 cm is necessary. Plen...

WORLD AGRICULTURAL TYPES :- We use the'term 'Agriculture' to describe all of man's activities that are dependent upon the soil. It includes growing of crops and the raising of livestock. It is the chief occupation of man, for nearly two-thirds of the labour force the world today is directly engaged in it. Production of industrial crops such as cotton, flax, rubber and raising of animals for mea...

Biodiversity is the variation of life forms within a given ecosystem, biome or for the entire Earth. Biodiversity is often used as a measure of the health of biological systems. The biodiversity found on Earth consists of many millions of distinct biological species, which is the product of nearly 3.5 billion years of evolution....

Ecology :- Ecology is the scientific study of the distribution and- abundance of life and the interactions between organisms and their natural environment. The environment of an organism includes physical properties~ which can be' described as the sum of local abiotic factors such as isolation (sunlight), climate, and geology, and biotic ecosystem, which includes other organisms that share its...