Farmers complain of not keep pace with the evolution of the prices of their products in the value of production inputs, which generates have a sense of injustice and weakens their purchasing power. Based upon targeted search estimate parity prices for Cereals major vegetables under study, standing over the keep abreast of developments in the prices of the evolution of the accident in the economic phenomena under study. The study concluded the following: 1- estimated parity prices shows according to the number record of the cost of living in the countryside, increasing the price the actual price of equity in 2003 and 2008 and in the years from 2011 to 2014 for tomatoes, and in the years 1998, 2006 and 2007 of the cabbage, and in the years 1998, 2008, 2009, 2011 and 2012 and 2013 and 2014 for the zucchini, and a low price for the actual parity price of green peas in the years from 1999 to 2005. 2- calculated parity prices indicate in accordance with No. record for average per capita income in rural areas, increasing the price the actual price equality for tomatoes in 1998 and 2003 and in the years from 2011 to 2014, and cabbage in the years from 1998 to 2001 and in 2006, and zucchini in the year 1998 and 1999, 2008, 2009, 2011 and 2012, 2013 and 2014, and the decline of green peas in the years 2002 to 2006. 3- The estimated equity prices reflect in accordance with No. record for the value of vegetable production inputs, increase the price the actual price equal to the tomato in 2011, and green peas in 1998 and 2013, and cabbage in 1998, and the lack of price actual price equal to the zucchini in all years of study. 4- Calculated parity prices shows according to the number record of the value of vegetable production, increase the price the actual price equality for tomatoes in 2003 and 2011, and green peas in 1998 and 2009. In the years from 2011 to 2014, cabbage and zucchini in 1998.