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Nitrogen has been present forever. It is the most abundant gas. Industrial revolution has changed it's concentration.
Application and source describe the ways that fertilizers have changed in the last 100 years. One hundred years ago, in 1918, fertilizers tended to be humus-, kitchen scrap-, leaf litter- or manure-based for application in-place or as part of plowing and weeding. One hundred years later, in 2018, fertilizers will be found in artificial, chemical, genetically engineered or synthetic and in organic forms and with granular, liquid or particle treatments.
It is a chemical change because it can change back if you refreeze the nitrogen and it changed the chemical.
Nitrogen
photosynthesis
by making plants grow better because plants need a certain amount of nitrogen to grow so it has made plants more healthier as they grow.
Commercial fertilizers are usually composed of three basic ingredients: Nitrogen, Phosphorus and Potassium. Depending on the plant results a gardener or farmer may wish for, the proportions of these three chemicals are changed.
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No, the ratio of nitrogen to oxygen is not changed by altitude.
Yes it is.
lightning & bacterial action (nitrogen fixers).
Nitrogen has been present forever. It is the most abundant gas. Industrial revolution has changed it's concentration.
Nitrogen fixation.
Nitrogen has been present forever. It is the most abundant gas. Industrial revolution has changed it's concentration.
nitrogen is changed by bacteria into different forms
Nitrogen fixation.
Application and source describe the ways that fertilizers have changed in the last 100 years. One hundred years ago, in 1918, fertilizers tended to be humus-, kitchen scrap-, leaf litter- or manure-based for application in-place or as part of plowing and weeding. One hundred years later, in 2018, fertilizers will be found in artificial, chemical, genetically engineered or synthetic and in organic forms and with granular, liquid or particle treatments.