340-349 Flashcards
soil texture
relitive poroportions of diffferent sized inorganic minerl particles of sand. silt, and clay
sand
largest soil particles (0.05 to 2mm in diameter)
silt
meddium sized particles (0.002 to 0.05 mm in diamiter)
clay
small partilces (less than 0.002 mm in diamiter)
ions
charged forms of soil minerals
loam
ideal agricultural soil, combo of different soil particle sizes
soil acidity
(pH) affects plants from nutrients mineral varies in deffernt Ph’s. optimum: 6.0 to 7.0
soil taxamony
classification fo soils into 12 orders, and each order into many different series
spodosols
from places with colder climats, amplle ercipitation, and good drainage. not food farmland because too acidic and nutrient poor because of leaching
alfisols
from temperate decidiuos forsts.
mollisols
from temperate, semiarid, and fertile soils. grows worlds grain crops
aridosols
from arid regions of all continents. provides rangeland for grazing animals, crops may be grown if water is supplys for irrigation
oxisols
low in nurtient minerals, exist an tropical and sub tropical areas with ample percipotation. thigs decompse very quickly
substainable soil use
the wise use of soil resources, without a reduction in the amount of ertility in the soil, so that it is productive for future generaitons.
soil erosion
the wearing away or remmoval of soil from the land
