Excess fertilizer that is not absorbed by plants can lead to water pollution when washed away by excessive irrigation.
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Fertilizers should be applied carefully to ensure proper dose, timing, and to observe pre- and post-application precautions to prevent excess runoff and water pollution.
In clayey soils, the organic matter in manure helps with drainage and prevents water logging.
In sandy soils, the organic matter in manure increases the water holding capacity.
Manure enriches soil with nutrients and organic matter, thereby increasing soil fertility.