Question

listed nitrogen cycle in biosphere why is nitrogen cycle said to be a perfect cycle name two non leguminous plant which can fix free nitrogen

Answer 1

The nitrogen cycle is the biogeochemical cycle by which nitrogen is converted into various chemical forms as it circulates among the atmosphere, terrestrial, and marineecosystems. The conversion of nitrogen can be carried out through both biological and physical processes. Important processes in the nitrogen cycle include fixation,ammonification, nitrification, anddenitrification. The majority of Earth's atmosphere (78%) is nitrogen,making it the largest source of nitrogen. However, atmospheric nitrogen has limited availability for biological use, leading to a scarcity of usable nitrogen in many types of ecosystems. The nitrogen cycle is of particular interest toecologists because nitrogen availability can affect the rate of key ecosystem processes, including primary production anddecomposition. Human activities such as fossil fuel combustion, use of artificial nitrogen fertilizers, and release of nitrogen in wastewater have dramatically altered the global nitrogen cycle.

Answer 2

Nitrogen cycle is known as perfect cycle in biosphere because it maintains the overall amount of nitrogen content in atmosphere, soil, and water.
Bayberry and Parasponia have nitrogen-fixing nodules