MEMORY STRATEGIESWHAT IS SOIL MADE FROM?SOIL-A WORM lives in soil. A=air W=water O=organic matter R=rock M=matter
HOW IS SOIL MADE?W weatheringO organic decompositionR roto tilling by burrowing animalsM material that is organic decays to make dark hummus
HO THE RISING LAYERS OF SOIL PROFILE YOUR GOOD SIDE FOR A PICTUREA HO THE RISING LAYERS FROM HORIZON A HUMMUSHORIZON B LEACHED MATERIAL VERY LITTLE HUMMUSHORIZON C THE WEATHERED PARENT ROCK NO HUMMUS
A’s are always on top and who wouldn’t be humming with A’s (humming = hummus)B’s might need to leach a bit in life but still hum a little, too C’s are on the bottom and may have to live with parents who rock a bit longer so no humming
Characteristics of soil
Texture determined by amounts in composition
sand Silt clay
pH Acidic lower pH Basic pH higher pH Neutral pH = 7
Pore space Sand has larger pore size between particles
Silt has less pore space than sand but more the clay
Clay has the least pore space
color Determined by minerals
Fertility of soil (ability to grow plants)
Climate, topography, amount of humus, minerals, and nutrients.
WHAT IS SOIL MADE FROM?SOIL-A WORM lives in soil. A=air W=water O=organic matter R=rock M=matter
Fertility of soil (ability to grow plants)
Climate, topography, amount of humus, minerals, and nutrients.
W weatheringO organic decompositionR roto tilling by burrowing animalsM material that is organic decays to make dark hummus
C
B
A
Ahttp://shelledy.mesa.k12.co.us/staff/computerlab/KFW_2nd_Grade_Links_Soil.html
http://www.ctahr.hawaii.edu/mauisoil/a_profile.aspx
Type of RockWeathering Rate
Temperature/water & soil formation rate
Topography (slope & erosion) and soil formation rate
Biotic level and soil formation rate
Metamorphicslowest
Coldest dryestslowest
Steep slopeFastest erosionslowest
Little life of 5 kingdoms slowest
Igneous Warm wetmedium
Medium slope medium erosion
Some life of 5 kingdoms Medium
Sedimentaryfastest
Hot and wettestFastest
Flat areaSlowest erosionfastest
Many and differing life formsfastest
A’s are on top and hummingB’s leach a bit C’s stay with rocking parents C
horizon location biotics otherA Top (top
soil)All forms including decomposers
Most eroded, most developed,
B Middle All formsHas some humus
Rain turns it Reddish from leached minerals of A horizon seeping down to B horizon
C bottom No humus Larger parts of Parent rock just beneath C level
Tropical soil
DesertSoil
Temperate Soil
Artic
Warm and wet so a lot of erosion and leeching
Hot Dry so low biotics and little erosion
Moderate temp and rainfall so moderate erosion
Cold dry low biotics and little erosion
Thin humus
Little organic
Rich humus Poorly developed A,B,C
Fast soil Slow soil
Moderat soil good for growing
A lot of rocks
Humus layer Horizon AConnected pore spaces, Very fertile
Smooth sticky Clay, gray means a lot of rain