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Grass is green because of a bright pigment called chlorophyll which reflects the green color.

www.popularmechanics.com/home/lawn-garden/how-to/g1268/8-things-your-lawn-is-trying-to-tell-you

The brown blades, even when mixed with healthy green blades, are early indicators ... The fungal threads in the soil will initially cause the grass in the circle to ...

www.livescience.com/32496-why-is-grass-green.html

Feb 20, 2013 ... Like many plants, most species of grass produce a bright pigment ... when stimulated, fire off an electron that causes chemical changes in the ...

homeguides.sfgate.com/causes-light-green-yellow-color-lawns-86785.html

Most lawn grasses have a lush appearance and bright-to-dark green color when they are healthy and well nourished. Light-green and yellow shades usually ...

www.gardeningknowhow.com/lawn-care/lgen/fixes-for-yellow-lawns.htm

Jan 8, 2017 ... There are many issues that can cause a lawn to discolor. But do you know how to turn a yellow lawn green again? This article will help with ...

www.garden-counselor-lawn-care.com/why-grass-stays-brown.html

What causes that to happen, and what can you do about it? ... All of these factors will have a bearing on when the lawn might start to green up, and why grass ...

www.flymo.com/uk/lawn-care-advice/causes-and-fixes-for-yellow-grass

There's nothing worse than a lovely green lawn that is spoilt by patches of yellow grass. Continue reading to find out the common causes on why your lawn turns ...

naturehacks.com/reasons-your-lawn-could-be-yellow-and-what-to-do-about-it

But if your lawn starts turning yellow, there is cause for concern. Just as a well maintained, carpet-like green lawn can make a house look amazing, ...

www.briggsandstratton.com/na/en_us/support/maintenance-how-to/browse/how-to-get-green-grass-lawn-maintenance-tips-from-briggs-and-stratton.html

Once you understand the causes for this, you can learn how to restore your grass back to a healthy green hue. Here are the most common causes of green grass ...

wonderopolis.org/wonder/why-is-grass-green-2

Similarly, grass appears green because it absorbs all the wavelengths of white light except green. Green is reflected off the grass. When the green wavelength ...