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Soil Nutrients and Fertilizers
Lecture for Chapter 6 - Dr. Goodwin - UCM Spring 2014
18
Agriculture
Undergraduate 1
02/21/2014

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Term
Macro VS. Micro
Definition
Macro-lots micro-little
Term
Non Mineral Elemants
Definition
c- Carbon
h - Hydrogen
o - oxygen
Term
O2 comes from H20
Definition
Living Plants are composed of an average of 80% water
Term
Functions of Nitrogen
Definition
- Promotes growth of leaves/stems
-Green Color and improves Foliage
-Needed to make proteins and chlorophyll
Term
Nitrogen Deficiency symptoms
Definition
-Young leaves will uniformly become pale-green or greenish- yellowish
-old leaves inter-veinal chlorosis, only veins remain green, leaves soon shed
-slow and dwarfed plant growth
Term
functions of phosphorus
Definition
-stimulates formation/ growth of roots
-fast/ vigorous growth and speeds maturity
-stimulates flowering and seed development
Term
Phosphorus Deficiency symptoms
Definition
-Decrease in growth
-slow maturity
-older leaves are purple-ish
Term
Functions of Potassium
Definition
-Used to make Carbohydrates/proteins
-Needed to make starches, sugars, and oils
-Increases ; :Disease Resistance : Plant Vigor : winter hardiness
Term
Potassium Deficiency Symptoms
Definition
-Leaf Tips turn Yellow/ brown spreading along the margin
-plants are stunted
Term
Fertilizers
Definition
Two ways to classify Nitrogen Fertilizers:
-Water-soluble: which is quickly available
-Water-Insoluble: slowly available
-Inorganic: Quickly available
-Organic: slowly available
Term
Organic Fertilizers
Definition
-Comes from plant or animal Matter and contains carbon compounds
-Examples: Urea, sludge, and animal sewage
Term
Advantages of Organic
Definition
-slow release of nutrients
-not easily leached from the soil
-adds organic matter to the soil
Term
Disadvantages of organic
Definition
-Hard to get
-Not Sterile
-Low Nutrient content
-expensive
Term
Milogranite (.com)
Definition
-most available organic fertilizer
-activated sewage sludge
Term
Inorganic Fertilizers
Definition
-No carbon
-From sources other than animals or plants
-manufactured in Factories
-
Term
Advantages of Inorganic
Definition
-Can make the desired Ratio of Nutrients
-Easy to get
-Lower Cost
Term
Disadvantages of Inorganic
Definition
-No organic Material
-Possibility of Fertilizer build up in Plant Media
Term
Inorganic Nitrogen Fertilizers
Definition
-All inorganic fertilizers are quick release
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