21) Microbes used along with artificial nitrogenase in organic farming.
Answers
Explanation:
Biofertilizers comprise a promising tool in agricultural ecosystems as a supplementary, renewable and ecofriendly source of plant nutrients. As they have an ability to transform nutritionally important elements from non-usable to highly assimilable forms without deleterious effects on natural environment, they are an important component of Integrated Plant Nutrient System (IPNS) (Alley and Vanlauwe, 2009). Application of biological fertilizers is thought to be a key element in maintaining soil fertility and crop productivity on the sufficiently high level, indispensable to achieve sustainability of farming. Biofertilizers may also help mitigate pitfalls arising from the growing demand of global population for food and from the widespread chemicalization in agroecosystems. The changing approach to the agricultural practices makes biofertilizers a vital part of modern-day crop production and emphasizes significance of biological inoculants in forthcoming years. A number of rhizosphere microorganisms is known to exert multifarious plant growth promoting activities, but very few have been formulated in the form of biofertilizers. Therefore, new techniques allowing for their extended application are required to attain objectives of organic farming.