Determining the weight of 100 CDs depends on whether only the CDs are weighed or if the CDs have sleeves or jewel cases. A single CD by itself weighs about 0.58 ounces. Therefore, 100 CDs by themselves weigh 58 ounces.
Plants and animals need nitrogen in order to make proteins. Proteins are essential compounds for healthy growth and fully functioning organisms. However, nitrogen is often in short supply to plants in both natural and agricultural systems. If nitrogen supply limits the growth of plants then the animals which feed on the plants will also suffer.
Nitrogen is one of the most important chemical elements for plants. If there is not enough nitrogen available in the soil plants look pale and their growth is stunted. Nitrogen fixing plants are called legumes. Legumes - and all peas and beans are legumes - are plants that work together with nitrogen fixing bacteria called Rhizobia, to fix nitrogen. The Rhizobia chemically convert the nitrogen from the air to make it available for the plant. Legume plants live in a symbiotic relationship with the nitrogen fixing bacteria - the Rhizobia live in nodules in the plant's roots. This way the plant can look after its own nitrogen needs. Fertilizer is not required.