Review on Yield Gap Analysis: Modeling of Achievable Yields at Farm Level

In the present context, ‘model’ is expressed as a computer program that can be repeatedly run several times for computing designed mathematical or statistical expressions (equations) governing crop growth-environment relations, given appropriate input data. The experiment station yields obtained under rainfed situation without any nutrient deficiency mostly considered potential of crops. Actual are by recording farmers in region investigation and achievable yield between actual yield. compared with to estimate gaps crops area others which have same agro-ecology. Achievable determined factors like availability moisture nutrients, Precipitation irrigation input, Soil profile water holding characteristics, Plant balance (transpiration, uptake), (evaporation, infiltration, runoff, flow, drainage) Nitrogen fertilizer applications nitrogen conditions, (uptake, fixation, mobilization), (mineralization, immobilization, nitrification, denitrification). Generally, modeling farm depend on data weeds, insect pests, diseases pollutants.