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Weeds are the most dangerous enemies of agricultural crops as they have a role in inhibiting the growth of crops through mechanical competition and hidden competition. Observing the growing prevalence of this grass in many farms during our visits to cover the implementation of the land cover protocol we adopted a scientific experimentation to study the impact of the cyperus extract on the germination of barley seeds by answer the following questions: 1- How fast is the germination of barley seeds after adding cyperus extract to the soil? 2-How does the cyperus extract affect number of germinated seeds? 3-How does the cyperus extract affect the growth rate of the barley plant? 4-Do the characteristics of the soil on which cyperus grow get affected? We applied the study in school and farm where we took a samp of cyperus plant and worked to make cyperus extract with different concentration (0%, 10%, 20%, 30%). Then we watered the soil in 4 pots and took measurements of growth for a month through the application of the land cover protocol. The soil Protocol has also been applied to measure the conductivity ,Salinity and acidity of the soil on which Cyperus plant grows and other soil on which Cyperus does not grow. The study results indicated that the cyperus extract inhibited the seed germination and decrease the growth rate of barley. In addition , the values of the conductivity and salinity was low for soil where plant grow compared to a sample of soil that does not grow on it. From these results, we recommend that farmers need to get rid of the cyperus weeds continuously. They can also filter organic fertilizer before using it to get rid of any dangerous weeds and use the organic fertilizer in agricultural cycle.