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What is fertilizer?
chemicals/natural substances added to the soil to increase fertility
3 major elements used in largest quantities by plants
analysis of a fertilizer refers to
its guaranteed content of nutrient elements
by law, a product sold as fertilizer must list
the guaranteed content of nutrient elements based on weight
elements are listed on the bags as
percentages are listed in what order?
N, P, K
a complete fertilizer has what?
one that has N, P, and K
an incomplete fertilizer is what?
missing one of the primary plant essential elements (also known as specialty fertilizer)
Fertilizers affect the soil in what two ways?
either acidic or alkaline affect
organic fertillizers are made of?
plant or animal waste/residue
When applied to soil and decomposed,
they provide nutrients to the soil
when fertilizer is put dry on top of the soil with or without incorporation into the soil
fertilizer is applied dry along with plant rows/furrows
sprayed over the soil surface or applied in irrigation water
a gas, anhydrous ammonia, is knifed into the soil
what is the rate of application?
amount of fertilizer applied to a volume or area of soil
type of nutrients and amount to be applied is determined by
soil test and/or tissue test
these methods are better because
waiting to see visual deficiency symptoms may be too late
What would you like to do?
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