author(s)
Arshdeep Singh and Shimpy Sarkar

abstract
Fertilizer is the most important component for every crop. Specially nitrogen fertilizer plays a vital role for crop production. With maximum use of fertilizers farmers get good result even in same crop varieties and soil. According to the study farmers are believing that if we apply more fertilizer then there will be maximum production. Due to more fertilizer doses the plant tissues are more succulent and can be easily digested by insects. So, most of the insect pests are attracted towards rice crop. There is major three fertilizers which are helping plants for completing their life cycle. These are Nitrogen, which comes from urea application, Phosphorus received from DAP, SSP, TSP and Potassium from Muriate of potash. Nitrogen provides green leafy parts due to carbon element and increase leaf area index which helps in better Photosynthetic rate. Phosphorus is helping in better root growth and establishment and in flower setting or emergence, potassium provides strength to plant for making resistance against of insect/pests’ infestation. The doses of NPK are always recommended but according to different studies it has been reported that excess number of fertilizers are majorly responsible for causing disturbance in the balance ratio of plant’s metabolism. It was also reported that by increasing nitrogen dose the yield is increased but insect/pest attack is also increased. In this case application of potassium and ZnSO₄ is also required to control them in different crops. Anhydrous ammonia also contains nitrogen up to 82%, which is reported as highest, but it is not that much recommended for all crops due to its toxicity level. Due to its highest ammonia, it is recommended that it should be applied at once in the soil by injection or below from the root zone depth of any crop. It was reported that plant hight was good but plant colour, no. of tillers, no. of effective tillers all is less from normal urea fertilizers.