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Fertilizers | Chemistry for GCSE/IGCSE - Class 10 PDF Download
Fertilisers
N, P, K Fertilisers
- Fertilisers contain nitrogen, potassium, and phosphorus.
- Nitrogen is essential for making chlorophyll and proteins, promoting healthy leaves. For example, in plants like spinach, nitrogen is crucial for the vibrant green color of the leaves.
- Potassium plays a key role in promoting growth and ensuring the health of fruits and flowers. An example is how potassium aids in the development of strong apple trees with healthy fruit.
- Phosphorus is vital for promoting healthy roots. It helps plants establish a strong root system, such as in carrots where phosphorus contributes to robust root growth.
- Fertilizer compounds consist of water-soluble ions, including:
- Ammonium ions (NH4+) and nitrate ions (NO3-) as sources of soluble nitrogen. These ions are readily absorbed by plants for growth.
- Phosphate ions (PO43-) as a soluble phosphorus source, crucial for energy transfer in plants.
- Common potassium compounds dissolve in water to produce potassium ions (K+), which are essential for various plant functions.
- Some common fertilizer compounds are:
- Ammonium nitrate (NH4NO3)
- Ammonium phosphate ((NH4)3PO4)
- Potassium sulfate (K2SO4)
- Ammonium salts and nitrates are widely used as fertilizers due to their nutrient-rich composition.
- Different fertilizers contain varying proportions of nitrogen, potassium, and phosphorus based on their intended use and plant requirements.
Question for FertilizersTry yourself: Which nutrient is responsible for promoting healthy roots in plants?View Solution
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FAQs on Fertilizers - Chemistry for GCSE/IGCSE - Class 10
| 1. What are the different types of fertilizers commonly used in agriculture? |  |
Ans. Some common types of fertilizers used in agriculture include nitrogen-based fertilizers, phosphorus-based fertilizers, and potassium-based fertilizers. These fertilizers provide essential nutrients to plants for healthy growth and development.
| 2. How do fertilizers help improve crop yield and quality? | |
Ans. Fertilizers provide essential nutrients to plants, such as nitrogen, phosphorus, and potassium, which are necessary for their growth and development. By applying the right type and amount of fertilizers, farmers can ensure that their crops receive the nutrients they need to produce higher yields and better quality produce.
| 3. What are the potential environmental impacts of using fertilizers in agriculture? | |
Ans. The excessive use of fertilizers can lead to environmental problems such as water pollution, soil degradation, and loss of biodiversity. When fertilizers are not properly managed, they can leach into water bodies, causing harmful algal blooms and other water quality issues.
| 4. How can farmers determine the right type and amount of fertilizer to use on their crops? | |
Ans. Farmers can determine the right type and amount of fertilizer to use on their crops by conducting soil tests to assess the nutrient levels in their fields. By analyzing the soil composition, farmers can make informed decisions about which fertilizers to use and how much to apply to optimize crop growth.
| 5. Are there any sustainable alternatives to traditional chemical fertilizers? | |
Ans. Yes, there are sustainable alternatives to traditional chemical fertilizers, such as organic fertilizers, compost, and manure. These alternatives provide nutrients to plants in a more environmentally friendly way and can help improve soil health over the long term.
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Oct 24, 2025
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