**3.2. Water contamination through horticultural pollutants**

Only the industrial solid wastes with heavy metals are not the headache for water contamination today. Agricultural wastes, more specifically the horticultural wastes within horticultural cultivation system and processing by-products, can hamper the water quality in various ways. Fertilizer and other pesticide chemicals are responsible for both ground and surface water contamination. Toxic trace elements make the essential nutrients unavailable, and beneficial soil-borne microorganisms become extinct. Water pollution pyramid (**Figure 1**) stated that groundwater use has become unsafe for the toxicity of the chemicals. Erosion, sedimentation, salinity are the typical after-effects of continuous cultivation system.

Only agricultural field makes the water polluted about 70% worldwide [26]. Besides, different intercultural operations have the major influence in water contamination (**Table 4**).
