Author Question: All of the following are commonly accepted rules for determining whether an element is essential ... (Read 43 times)

jc611 · **on:** Jul 21, 2018

All of the following are commonly accepted rules for determining whether an element is essential
EXCEPT ____.

a. a lack of the element stops plant growth or reproduction
b. a shortage of the element can only be corrected by supplying that element
c. the element needs only to be in trace supply
d. the element is directly involved in plant nutrition

Question 2

In determining how much herbicide to use on a soil, growers must consider the cation exchange
capacity because colloids adsorb pesticides as well as nutrients.

Indicate whether the statement is true or false.