Bark: Neem bark contains tannins which are used in tanning, dyeing, etc. Compounds extracted from neem bark are used in production of some dental – care products. Neem bark is also tapped for gum.
Seed: Neem seed pulp is useful for methane gas production. It is also useful as carbohydrate – rich base for other industrial fermentations.
Neem Leaves: Neem leaves are not only useful for pest and disease control, they are also fed to livestock mixed with other fodder. Neem leaves are used in some parts of India as fertilizer in rice fields. In some countries, neem leaves are used as mulch in tobacco and tomato fields. Neem leaves are spread over the plant roots to retain moisture, kill weeds etc. Neem leaves can also be used to protect stored woolen and silk clothes from insects.
Neem Oil: Neem oil contains several compounds which have proven medicinal and agricultural uses of high value. Neem oil is, however, not used generally for these purposes. The most common use of neem oil is for soap production. This indicates vast scope for expanding neem oil production. Collection of neem seeds to be supplied to the crushers can be important means of supplementary employment and income for the poor households, especially the rural women, since the task of seed collection is highly suited to them.
In India, the oil is usually produced the kernels in bullock-operated ghanis (wooden-mills). Most of the available neem oil is sold to soap producers at cheap rates, indicating underdeveloped marketing facilities and lack of organization of poor and scattered neem seed collectors. Soap manufacturers usually use neem oil in crude form to produce cheap laundry soap. Some quantity of neem oil is also used in the production of expensive, good quality soaps which are odourless. Medicated soaps with neem’s odour are also produced on a commercial scale. Neem soaps are now widely available in several countries and are gaining in popularity. Neem toothpaste is another commercial item which is widely available in India as well as several European countries. Neem is being used in other oral hygiene preparations also.
Neem is now becoming a popular beauty aid. Some companies are now using neem products (neem oil and leaves) for production of cosmetics like facial creams, nail polishes, nail oils, shampoos, conditioners etc.
There are several other uses of neem oil as well. Neem oil can be used as an illuminant. In India, neem oil is widely burnt in lamps for lighting and repelling mosquitoes. Neem oil is used for mosquito net impregnation which seems to be gaining popularity. Neem oil is also useful for lubrication purposes.
Neem Cake: Neem cake has multiple uses. It has varied uses as livestock feed, fertilizer and natural pesticide. It not only provides nitrogen but also inhibits the nitrification process, when mixed with urea, before applying in the field, such use of neem coated urea (90:10) can save about 30% of the total chemical nitrogen requirement of crops, which otherwise would go waste and help in reduction the cost of agricultural production. Neem cake is widely used in India as fertilizer for sugarcane, vegetable and other cash crops. Neem cake also acts as a pesticide. When added to soil neem cake protects plant roots from soil-insects and nematodes.