Chemical Fertilizers |
Having in mind the global population growth and the daily increment of global demands to food and nutrients, rising in agricultural products is essential. On the other hand the natural resources for agriculture are seriously limited. Fertilizers are applied to soils to supply its essential nutrient for plants growing. Elements, such as nitrogen, phosphorous, potassium, calcium and magnesium are the major, and Iron, zinc, manganese, copper and boron are the minor elements used in fertilizers. Soils of many areas suffer from poor nutrients; utilizing different fertilizers increase the soil fertility and consequently productivity. The selection of sufficient fertilizer for each region depends on type and composition of the soil, alkalinity of soil, the plant type to be grown, etc. Additionally, type of fertilizer and its consumption amount is inclusively effective on community health. Average consumption of nitrogen, phosphate and potash fertilizers is 73.34, 26.83 and 19.82 in globe, and 13.24, 8.34 and 2.08 kilogram per hectare in Iran (according to Ministry of Agriculture Jihad official reports), respectively. Thus Iran’s annual consumption of fertilizer is much lower than global average. Lying to the sixth law of development, agricultural self-sufficiency in wheat, barley, corn, rice, oily seeds and beetroot is to secure required foods and improve value added to agriculture. In order to achieve to this purpose, increasing fertility and efficiency of soils is crucial. Since average consumption of fertilizers is much less than globe’s, agricultural products increment is possible by proper fertilizer usage. At the present, Iran imports all types of fertilizers except urea, implying improper status of fertilizer producing in Iran. |