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These high temperatures drive high rates of evaporation in the Persian Gulf, as much as 124 cm (49 in)/year leading salinity to increase in the shallow lagoons to as much as 70 ppt. [10] The net rate of evaporation from the sabkha can be as much as an order of magnitude less and has averaged 6 cm (2.4 in) for the last 4,000 to 5,000 years. [13]
The soil mineral apatite is the most common mineral source of phosphorus, from which it can be extracted by microbial and root exudates, [79] [80] with an important contribution of arbuscular mycorrhizal fungi. [81] The most common form of organic phosphate is phytate, the principal storage form of phosphorus in many plant tissues.
The term mineral cycle appears early in a 1935 in reference to the importance of minerals in plant physiology: "...ash is probably either built up into its permanent structure, or deposited in some way as waste in the cells, and so may not be free to re-enter the mineral cycle."
Salt pan at Lake Karum in Ethiopia. Natural salt pans or salt flats are flat expanses of ground covered with salt and other minerals, usually shining white under the sun. They are found in deserts and are natural formations (unlike salt evaporation ponds, which are artificial). A salt pan forms by evaporation of a water pool, such as a lake or ...
The difference in size and volume is perhaps the most important distinction between the two types of salt. If you are measuring by volume—using teaspoon measurers, for example—you'll get a lot ...
Highly oxidized red soil in Tirunelveli District, India. Red colors often indicate iron accumulation or oxidation in oxygen-rich, well-aerated soils. [4] Iron concentrations caused by redox reactions because of diffusion of iron in crystalline and metermorphic rock, in periodically saturated soils may also present red colors, particularly along root channels or pores.
This week's column explains why native plants are important and offers alternatives to Bradford pear trees and info about becoming a Master Gardener. Ask the Master Gardener: What's the difference ...
What is the difference between continental, regional and local native plants? And what about invasive plants? Here's a breakdown for your green thumb.