Question

Name the following
a. Chemical substances that is rich in a particular nutrient.
b. A modern machine used for harvesting as well as threshing of the mature crop​

Answer 1

Explanation:

plough (UK) or plow (US; both /plaʊ/) is a tool or farm implement used for initial cultivation to loosen or turn the soil in preparation for sowing seed or planting. Ploughs were traditionally drawn by working animals such as oxen and horses, but in modern farms are drawn by tractors.

Answer 2

Answer:

a.- The chemical elements humans consume in the largest quantities are carbon, hydrogen, nitrogen, oxygen, phosphorus, and sulphur, summarized as CHNOPS.

b.- harvester