azolla natural fertilizer

Nature restores soil fertility through the following processes: 1) Weathering of rocks. 2) Earthworms and rodents help bring fresh subsoil to the surface by burrowing. 3) Release of minerals by decay of faller leaves, twigs and dead bodies of animals and plants. 4) Biological f..

Soil's fertility is its capacity to sustain plant life with required nutrients. Fertility of soil decreases when the same crop is grown in the same land repeatedly, or by soil erosion. Erosion is the physical removal of soil particles from their original places and transporta..

Natural Gas - It is a mixture of gaseous hydro-carbons. It is found usually along with petroleum deposits. Natural gas consists mainly of 85% methane, 10% of ethane and 3% of propane and butane. It may also contain nitrogen, oxygen, carbon di-oxide and hydrogen sulphide. Its gre..

. As genes control traits, one can say that the frequency of certain genes in a population changes over generations to bring about evolution. An interesting case of variation has occurred for this grass species Anthoxanthum odoratum seen in the image below. Some of these plants live near mines wher..

Natural resources that are limited in nature and are liable to be degraded in quantity and quality by human activities are exhaustible natural resources. Examples are forests, soil, wild animals, minerals, fossil fuels etc. The understanding of the environment and its..

Natural resources characteristically exhibit two features. They are: 1) Physical limitations 2) Limitations of regeneration / production. Natural physical resources like geophysical, hydro-geological, edaphic, atmospheric resources exhibit physical limitations. Such limitations ..

Question: Write a short note on the fertility of soil. Answer: The capacity of the soil to sustain the plant life with required nutrients is called the fertility of the soil. The fertility of soil reduces mainly due to soil erosion. When a crop is grown on ..

Soil is classified based on nature and composition. They are: Alluvial soil - rich in loam and clay Black soil - mostly made of clay Red soil - sandy to loam Mountain soil - stony, sandy soil Desert soil - sandy and poor in organic carbon Laterite soil - porous clay, rich in iron and alum..

Biofertilizers - Any living organism supplying plant nutrients directly or indirectly is regarded as biofertilizer. They are not synthetically manufactured in factory. Many organisms with a potentiality to supply plant nutrients - have been recognised. Use of biofertilizers has many advantages. The..

Soil ecology is the study of life in soil in harmony with abiotic factors like air, soil particles, carbonaceous materials etc. In its natural condition, soil has its own equilibrium featured by delicate balance between micro and macro organisms in the form of series of food chains ..