Salicylic Acid and Nutrient Regulation in Plants : Sustainable Productivity

Sustainable development is the key requirement for proper growth and yield of plant species under changing environment due to adverse human activities on the natural ecosystem. Non-scientific utilization of natural resources cause socio-economic imbalance worldwide. It is now understood that agriculture also can negatively affect the environment through over use of natural resources as inputs or through their use as a sink for waste and pollution. Such effects are called negative externalities because they impose costs that are not reflected in market prices. These environmental costs shift conclusions about which agricultural systems are the most efficient and suggest that alternative practices and systems that reduce negative externalities should be sought. Food security to the present population needs high adaptation ability of plant system exposed to adverse environmental conditions. The agricultural productivity attained during the 1980s has not been sustained during the 1990s and has posed a challenge for the researchers to shift the production function upward by improving the technology index.