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19 votes
Accepted

When did wildfires start to occur on earth?

A definitive statement comes from the abstract of Scott and Glasspool1, 2006: Charcoal, a proxy for fire, occurs in the fossil record from the Late Silurian (≈420 Myr) to the present. One of the ...
Spencer's user avatar
  • 3,628
7 votes

When we're talking about the tree line, does it include mountain pines?

From Ann H Zwinger and Beatrice E Willard, 1972, Land Above the Trees, Harper and Row, New York. 1st edition. 1972. 489 pp. The following is from page 59... Beyond treelimit, trees are so stunted ...
Thomas Perry's user avatar
4 votes
Accepted

Why does chlorophyll only come in green?

chlorophyll is green because that was the part of the spectrum that was left when plants evolved. The bulk of the spectrum was already being harvested by other photosynthetic life. there is actually a ...
John's user avatar
  • 6,931
3 votes

Why does chlorophyll only come in green?

To ask why chlorophyll is green is a bit like asking why haemoglobin is red. That is just the colour of them, in the case of haemoglobin due to the iron content and in the case of chlorophyll probably ...
Michael Walsby's user avatar
3 votes

Which types of trees clean the air best?

Evergreen trees grow faster than most hardwood deciduous trees, so their absorption and oxygen emission is greater. Note that trees do not "clean" air. Plants emit oxygen which is why air in ...
Tyler Durden's user avatar
  • 1,804
3 votes

Can we store maize along with husk and kernal?

For the (1) you can store your whole maize for 8 - 12 years or 18 - 36 months if the maize is ground or chopped. Moreover the less moisture the maize has the more it can be stored. If you want to ...
geokord's user avatar
  • 31
2 votes

Why is iron an essential part of iron fertilization and carbon sink?

That's largely because iron is scarce in seawater. It is what is known as a limiting factor -- certain physiological processes can't occur in the absence of iron, so even if nutrients such as nitrogen ...
jeffronicus's user avatar
  • 3,487
2 votes
Accepted

Were Carboniferous plants more efficient sequestering $\ce{CO2}$ than present plants?

Probably not. The biological pathways to make lignin is the same in all plants so there is no reasons to believe they would be better. If anything modern trees as a whole may be better since they ...
John's user avatar
  • 6,931
1 vote
Accepted

Why autumn follows the rainy season

The precise reasons for leaf shedding after monsoon aren't well known and studied, but there are vague reasons like optimising use of light and warmth for max photosynthetic gain. So the tree has a ...
bandybabboon's user avatar
  • 1,349
1 vote
Accepted

Fix pH Value ongoing with right plant

A pH of 6.2 is pretty acidic for soil . A more obvious method to lower acid would be limestone as gravel. And for a fast start ,add lime powder, available at any agriculture supply. Rototilling would ...
blacksmith37's user avatar
  • 1,043
1 vote
Accepted

Which plant produces the most oxygen?

I just read an article saying that algae produces more oxygen than all the plants in the world!! Edit: https://www.nps.gov/romo/learn/nature/algae.htm First paragraph last lines
Sabrina Tariq's user avatar

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