5.3 understand the use of fertiliser to increase crop yield

• Fertilisers are nitrate and phosphate.
• Nitrate are protein and phosphate are DNA membrane.
• Fertilisers can be divided to 2 group which is organic and artificial fertilisers.
• Organic are animal waste; cow facades; decomposition. Give crops land nitrate and phosphate.
• Artificial fertilisers are chemical; potassium nitrate and ammonia nitrate would be solution and at the end the result would be nitrate and phosphate like the organic.