Nutrient deficiency systems Flashcards
-leaves are small and light green; lower leaves lighter than upper ones; not much leaf drop; weak stalks.
Nitrogen
-dark-green foliage; lower leaves sometimes yellow between veins; purplish color on leaves or petioles.
Phosphorus
-lower leaves may be mottled;
dead areas near tips and margins of leaves;
yellowing at leaf margins continuing toward center.
Potassium
-tip of the shoot dies; tips of young leaves die;
tips of leaves are hooked-shaped.
Calcium
-lower leaves are yellow between veins (veins remain green);
leaf margin may curl up or down or leaves may pucker;
leaves die in later stages.
Magnesium
-tip of the shoots stays alive;
light green upper leaves;
leaf veins lighter than surrounding areas.
Sulfur
-tip of the shoot stays alive; new upper leaves turn yellow between veins (large veins remain green); edges and tips of leaves may die.
Iron
-tip of the shoots stays alive; new upper leaves have dead spots over surface;
leaf may appear netted because of small veins remaining green.
Manganese
-tip of the shoot dies; stems and petioles are brittle.
Boron
-new and intermediate leaves are small, yellow, sometimes with grayish cast. Narrow and older leaves may drop. Small shoots may show resetting followed by dieback.
Zinc
developed by Dr. Cesar P. Mamaril in Phil Rice which involves the following treatment:
- complete/ with N, P, K, Zn
- minus N
- minus P
- minus K
- minus Zn
MOET/Minus-One Element Technique
determination of the nutrient content of a plant part or whole plant sampled at a specific stage of growth.
Plant Analysis
This method includes:
● field experiment
● pot experimentation
● microbiological test
Biological Test
comparison of several fertilizer treatments including a control using small amount of soil in pots to have better control of environmental factors.
Pot Experiment
it involves the use of microorganism to determine the presence of nutrients in the soil.
Microbiological Test