Question

Answer in one word-
a.The most fertile layer of soil-
b.Essential thing plants get from soil along with water-
c.Dark colour substance that add fertility to soil-
d.Uppermost layer of earth-

Answer 1

Answer:

a . topsoil

b. nitrogen, phosphorus

c. Humas

d. topsoil

Explanation:

please mark me brainliest

Answer 2

Answer:

a).humus

b). hydrogen, oxygen

c).manure

d).soil