The answer that you are looking for is D.
Answer:
1. Urea, (d)Fertilizer
2. Combines, (c) Harvesting and threshing
3. Silos, (b) Storage of grains
4. Seed drills, (a) Sowing seeds
5. Irrigation, (f) Sprinklers
6. Tilling, (e) Preparation of soil
Explanation:
1) Urea is a widely used and important fertilizer in the agricultural industry
2) The combine harvester combines three categories of harvesting grain drops such as threshing reaping and winnowing
3) Silos are used to store grains
4) A seed drill is a seed planting mechanism for burying seeds to a particular depth during seed planting
5) Irrigation is the application of required volume of water to plants
6) Tilling is the digging, turning, and staring operations meant to prepare the soil.
Answer:
Explanation:
Using dimensional formula on both sides ,
LT⁻¹ =
=
equating the power of equal terms
- 2 a = -1
a = 0.5
-0.5 -3b = 1
3b = -1.5
b = -0.5
a + b = 0
Hence
a = 0.5
b = -0.5