Organic fertilizer: A key component of organic agriculture-A review

Gradually the area under organic farming is increasing and farmers are more attracted to organic farming due to various negative impacts associated with chemical fertilizers on soil as well as human health. But, while promoting the area under organic farming the main constraints that the farmers use-to face is lack of proper source, availability of adequate quantity of organic fertilizers for better crop production. For ages, although FYM and compost is the predominant source of organic agriculture, but the bulk requirement of the same discourages the farmers many a times. Now lot of organic fertilizers including liquid organic fertilizers is in use which is very cost effective and easy to apply. Therefore, an attempt has been made to review the different organic source, their nutrient content and their effect of different crops as well as on soil health.