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2. Soil gas - Wikipedia

   en.wikipedia.org/wiki/Soil_gas

   Soil gases (soil atmosphere [1]) are the gases found in the air space between soil components. The spaces between the solid soil particles, if they do not contain water, are filled with air. The primary soil gases are nitrogen, carbon dioxide and oxygen. [2] Oxygen is critical because it allows for respiration of both plant roots and soil ...

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   Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

4. Soil - Wikipedia

   en.wikipedia.org/wiki/Soil

   A typical soil is about 50% solids (45% mineral and 5% organic matter), and 50% voids (or pores) of which half is occupied by water and half by gas. [32] The percent soil mineral and organic content can be treated as a constant (in the short term), while the percent soil water and gas content is considered highly variable whereby a rise in one ...

5. Physical properties of soil - Wikipedia

   en.wikipedia.org/wiki/Physical_properties_of_soil

   Soil bulk density, when determined at standardized moisture conditions, is an estimate of soil compaction. [3] Soil porosity consists of the void part of the soil volume and is occupied by gases or water. Soil consistency is the ability of soil materials to stick together. Soil temperature and colour are self-defining.

6. Fertilizer - Wikipedia

   en.wikipedia.org/wiki/Fertilizer

   Soil acidification refers to the process by which the pH level of soil becomes more acidic over time. Soil pH is a measure of the soil's acidity or alkalinity and is determined on a scale from 0 to 14, with 7 being neutral. A pH value below 7 indicates acidic soil, while a pH value above 7 indicates alkaline or basic soil.

7. Forest management - Wikipedia

   en.wikipedia.org/wiki/Forest_management

   Earth offers enough room to plant an additional 0.9 billion ha of tree canopy cover. [54] Planting and protecting them would sequester 205 billion tons of carbon [54] which is about 20 years of current global carbon emissions. [55] This level of sequestration would represent about 25% of the atmosphere's current carbon pool. [54]