Soil Fertility and Essential Nutrients

Question 1

Soil fertility

Answer 1

ability of soil to supply essential nutrients to plants

Question 2

what makes an element essential

Answer 2

-necessary to complete vegetative or reproductive cycle
-Elements are not replaceable by another
-element is directly involved in growth/metabolism

Question 3

How many essential nutrients are there?

Answer 3

17

Question 4

Macronutrients

Answer 4

elements required in large quantities

Question 5

Micronutrients

Answer 5

elements required in smaller amounts

Question 6

Law of minimum

Answer 6

if one elements low level is not met production will be limited to that amount

Question 7

N functions

Answer 7

combines with carbs to form amino acids and proteins

Question 8

P funtions

Answer 8

energy transfer

Question 9

K functions

Answer 9

activated cellular enzymes

Question 10

S funtions

Answer 10

essential component of some amino acids, important for oil synthesis

Question 11

Diffusion

Answer 11

dominant for K & P. driven by concentration gradient

Question 12

Mass flow

Answer 12

dominant for Ca, Mg, NO3-. water driven

Question 13

Root Interception

Answer 13

Small contribution

Question 14

N deficiency signs

Answer 14

yellowing of leaves, stunted growth

Question 15

P deficiency signs

Answer 15

purplish stem/leaves, stunted growth

Question 16

K deficiency signs

Answer 16

dull green or yellow leaves