Assessing Dry Matter Accumulation in Different Parts of Maize Hybrid in Different Amounts of Nitrogen and Amino- acid

Studies have shown that the entrance of industrial, agricultural, hospital, and urban sewage jeopardize water resources. The vertical penetration of sewage into the earth layers can pollute water resources; for example, existing detergents in sewage, up to 1,200 meters, organic and mineral materials, up to four thousand and 500 meters, and oil products up to 3,000 meters, can penetrate in the ground, and in running route, pollute the water resources. Unfortunately, the Lar River is also one of the rivers that encountered with this serious problem, and human activities have had a devastating effect on it. The effective activities on the rivers are diverse, but one of the most destructive activities is industrial activities, especially plating activity, which enters the sewage into the environment, groundwater, and rivers, regardless of environmental, health and safety guidelines. This study was carried out to investigate the effect of industrial workshops on the physical-chemical characteristics of the Lar River water. In this study, northeast plating workshops in Tehran are considered as case study. Five hypotheses were suggested in this study that are measured by the experimental and observation method. Sampling process was done in 5 stations, and three times (morning, noon, and night) per day were checked. The sampling method from the Lar River, the sample volume at equal intervals, or the different sample volume is in consistent with the flow rate in collection time. Laboratory methods investigated nitrate, saltiness, color formation, detergent test, and so on. In addition, Calibration and quality control of samples were done. Finally, the measurement of heavy metals like iron, manganese, and lead were accepted as main indexes for measuring heavy metals as well as completing the measured data with parameters like turbidity, COD, BOD, etc. in several separate levels. Statistical calculations were performed by Spss software version 21. Finally, first hypothesis were rejected, and it was determined that the pollution amount in the Lar river is lower than the national standard rate and EPA. Other four hypotheses were confirmed. In addition, it is proved that the distance and proximity of studied stations to plating industry in Larriver affects the pollution of river. Therefore, the station that is closer to pollution resource, is more pollutant rather than other stations.