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| 1. |
Effect of manure,fretilizer and polythene on plant population |
| Answer» Manure\xa0is organic matter used as fertilizer in agriculture.\xa0Manures\xa0improve the fertility of the soil by adding organic matter and lots of nutrients, such as nitrogen that is trapped by bacteria in the soil. Higher organisms then feed on the fungi and bacteria in a chain of life.\xa0Fertilizers\xa0provide essential nutrients to\xa0plants\xa0in form of soluble salt compounds, and directly\xa0affect plant growth. Soil amendments indirectly\xa0affect plants\xa0by improving the physical or chemical properties of soil. ...\xa0Fertilizers\xa0also add nutrients that are essential to\xa0plants\xa0in the form of soluble salt compounds.\xa0Manures\xa0contribute to the\xa0fertility\xa0of the\xa0soil\xa0by adding organic matter and\xa0nutrients, such as nitrogen, that\xa0are\xa0trapped by bacteria in the\xa0soil. Kinds of\xa0manure\xa0: Green\xa0manure, compost or vermicompost.\xa0Manure\xa0helps in enriching\xa0soil\xa0with\xa0nutrients\xa0and organic matter and thus, increases\xa0soil fertility.\xa0Some of these\xa0impacts\xa0include algae blooms causing the depletion of oxygen in surface waters, pathogens and nitrates in drinking water, and the emission of odors and gases into the air. Nutrients from manure and\xa0fertilizers\xa0enter lakes and streams through runoff and soil erosion. | |