Description of practice
Inorganic fertilizers (e.g. N, P and K or micro-nutrients like boron, copper, cobalt) are applied either singly or mixed to enhance plant growth. Overfertilization may lead to pollution.
| Examples of how to use inorganic fertilizers | Further information (see Note below) |
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Broadcast fertilizer applicationFertilizer is broadcast spread on field crops, with or without being incorporated into the soil. A first (basal dressing) application is made at the time of planting/seeding and, in some crops, a top dressing of nitrogenous fertilizer is given to growing plants. |
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Band placement and side dressingFertilizer is applied in bands where developing roots will easily reach it (e.g. 5 cm to the side and below the seed row). Band placement is more localized and reduces nutrient losses. When row crops develop, further fertilizer may be given as a side dressing. |
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Slow- and controlled-release fertilizersA single pre-planting application of a slow- or controlled-release fertilizer is made to ensure gradual or staged availability of nutrients for efficient plant growth. Such fertilizers lower operational costs and reduce losses. |
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MicrodosingFertilizer (NPK 16-16-16; or DAP) is applied at a micro-dose of 0.3 g per planting station. This is equivalent to 3-8 kg fertilizer/ha, depending on planting pattern. Microdosing is combined with seed priming (soaking seeds for 8 hours prior to sowing) to boost yield. |
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FertigationIn fertigation fertilizers, soil and water amendments and other water-soluble products are injected into an irrigation system. Fertigation allows continuous, gradual fertilization of crops. |
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Foliar applicationFoliar sprays are widely used to apply micronutrients (especially iron and manganese) to many crops. Foliar application is also an effective way to remediate nutrient deficiencies as and when they become apparent. |
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Note: Most of the Further information links are to a full description of the example in the WOCAT database. However sometimes the link may be to similar practices or a research paper. Occasionally the link is to a commercial product in which case it should be understood that this does not imply any endorsement of the product by iSQAPER.