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Asked by beccawilko to Angus, Christian, Hannah, Laura, Simon on 26 Jun 2013.
Question: What types of fertilizer will make grass grow greener and not cause harm to the environment?
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Angus Ferraro answered on 25 Jun 2013:
Fertilisers contain nutrients which planets need to know. These nutrients can also be found in soil but plants grow bigger and stronger if they have more of these nutrients.
One of the main problems caused by fertiliser is overgrowth of algae in water. Fertiliser gets washed into rivers and lakes by the rain, where it allows algae to grow bigger and stronger. The water surface gets covered with all that green algae, which reduces the amount of oxygen dissolved in the water and causes fish to die. This is caused mainly by fertiliser containing nitrates, so people are starting to be more careful about how much nitrate they use.
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Laura Roberts Artal answered on 26 Jun 2013:
I guess the best type of fertilizer to use that will do least harm to the environment would be any ‘organic fertiliser’. They come from either vegetables or animals, so they themselves are very natural and likely to cause very little harm to the environment.
The most common types would be manure (horse or cattle poo, very smelly, but packed full of the good stuff grass needs to grow!), slurry (pig poo :s!), peat, worm castings, and other things like that.
The one main downside is that the nutrients aren’t as concentrated in these natural fertilisers so you need a lot more of them on your grass or crops, to get the same results as you would from processed fertilizers.
You also have to compost the raw fertilisers very well, to stop any of the nasty things you might find in the manure and slurry getting into the grass or vegetables and so make sure they are O.K and safe to eat (not the grass of course :P!). -
Simon Holyoake answered on 26 Jun 2013:
Can’t add anything here that isn’t already covered by the others
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