1
which of the following groups directly depend on soil for their livelihood?
ag producers
what are all the factors in soil formation?
time
topography
biological factors
The smallest soil particle?
clay
which value indicates acidity on the ph scale?
7
<7
soil erosion is a problem in agricultural production because it__?
removes the productive layers of soil
Soil is vital to agriculture because it?
provide oxygen
wildlife habitat
parent material
which is a general characteristic of organic soils?
nutrient rich
which soil particle feels gritty and odes not hold water well?
sand
which value indicates neutral on PH Scale?
7
the soil ecosystem consist of plants, animals, and microorganism that?
live all or part of the of their lives in the soil
which of the following refers to the material from which soil is formed?
parent material
inorganic soils are?
composed of a high percentage of minerals
which soil particle feels smooth and powdery?
silt
soil Ph is important in agricultural because it affects?
nutrient availability
burrowing animals are beneficial to the soil by?
mixing subsurface materials with surface soils
which soil formation factor includes the weathering forces of wind and precipitation?
climate
the largest soil particle is what?
sand
which soil texture is considered good for agricultural production and most crops?
loam
the productive layer of soil vital to producing healthy crops is the ___.
topsoil
which helps the soil ecosystem by stirring and aerating the soil and shredding organic matter?
which soil formation factor involves microorganisms decomposing dead plants and animals?
biological factors
Which inorganic soil material results infertile and productive soil?
Volcanic ash
which value indicates alkalinity on the PH scale?
14
>7
which of the following is a method to reduce erosion?
rotate crops
what are small one-celled organisms that often have a symbiotic relationship with plants?
bacteria