SLMG L5

Past key drivers that supported agricultural productivity

tillage, agrochemicals, and plant breeding

What is the most abundant form of carbon in the stmosphere?

CO2

What happens to the carbon that is stored in the roots and plant body?

it gets stored in the plant

How does the carbon go from the plants to the soil?

the roots or when the plant dies

How does carbon reenter the atmosphere from the soil?

respiration from microbes

GPP

the amount of carbon which is collected by the plant during photosyntheses

NPP or net primary productivity

photosynthesis-respiration

How can you increase carbon storage (carbon sequester) in the soil?

add organic matter, living crop residues, compost, manures, organic fertilizer, and reducing tillage

Fixed factors affecting carbon cycling

climate, topography, geology

Manageable chemical factors that influence carbon cycling

Manageable physical factors that influence carbon cycling

Manageable plant community factors that influence carbon cycling

Three biological manageable factors that influence carbon cycling

define decomposition

smth smth page 5

Why are earthworms good for the soil?

What can be better than organic matter?

fresh soil residues

What does carbon cycling improve?

What is mineralization?

conversion of organic nitrogen to inorganic nitrogen

What do nitrogen tests not show?

if the N is available to the plants?

accumulation and insufficiency

What can be done to combat soil asynchrony?

apply a material that takes longer to compost after a material that takes a short amount of time to compost

What influences absorption and fixation rates in soil?

soil pH

What can happen if too much manure is added to the soil?

too much Phosphorous

Good microbes in the soil reduce the risk of plant _____.

disease