Ice Wedge: wedge of ice whose expansions and contractions from melting and freezing open big cracks in the ground.
Cation Exchange Ability: how perfectly a soil hosts exchanges of cations between its minerals and its plant roots. Usually, soils high in clay and organic make a difference carry a destructive charge that retains plant nutrient cations towards leaching away. Higher CEC ordinarily correlates with high fertility.
Neutron: a chargless particle from the nucleus of an atom. Neutrons and protons make up the majority of the atom's mass.
Main Aeration: using plugs of soil away from the ground to extend its aeration. Roots die in extremely compacted ground.
Bush Fallow: secondary tropical or subtropical vegetation planted in forests in an effort to regenerate the soil amongst crops.
I 1st noticed this reviewed every single week within the Guardian newspaper right here in the united kingdom and it really bought my attention, I hadn't viewed it up right up until then.
Accretion: the accumulation of marine sediments at the perimeters of a continent, increase in some instances into overall coastal mountain ranges. See Plate Tectonics for more about what will cause accretion.
It is a testament to Bruce Greenwood's performing that Adan hardly ever results in being entirely as insufferable given that the words that arrive out of his mouth.
Contour Farming: farming perpendicular to the slope of a hill or mountain, as opposed to straight up or down it, to minimize runoff and erosion. Which includes belts of cover vegetation between crops is named contour strip farming.
we get our food stuff, the pyramid rests on three stages: to start with, from a community backyard; future, from nearby natural and organic farmers; and previous, imported from elsewhere, a highly-priced decision presented the level of gasoline and preservatives required.
Elephants in China tend to be more often born tuskless, now, on account of strain from poaching. See Speciation for an illustration of a family of get more info Asian butterflies branching into unique species nowadays. Genetic mutations, that happen to be uncommon and frequently harmful, Enjoy considerably less of a job in evolution than Darwin considered, and cultural forces that reinforce selection for selected characteristics a larger position.
Group Coefficient: a measure of similarity concerning the crops and animals of two various ecological communities.
Neurotoxin: a poison that disrupts nerve purpose. Some venoms are neurotoxins that paralyze the prey.
Chimera: an artificially made animal composed of mixed DNA. A human having a mouse's brain can be an instance, as would Frankenstein's angry monster. In Greek mythology the Chimera--a hearth-breather who was component lion, portion goat, and aspect dragon--devastated the land until at last slain by a hero.