ICAR AIEEA PG Agri-Business Management 09 July 2023 (Shift 1) Paper

Nutritional chemistry of grain pulses:

• Biotin is vitamin B7, an essential micronutrient.
• Niacin is vitamin B3, an essential micronutrient.
• Pantothenic acid is vitamin B5, an essential micronutrient.
• Phytic acid (myo-inositol 1,2,3,4,5,6-hexakisphosphate) is a major anti-nutritional factor stored in grain pulses and cereals that strongly chelates essential polyvalent mineral cations (iron, zinc, calcium, magnesium), preventing their intestinal absorption.

Farm implement functions:

• Disc harrow is utilized for secondary tillage, pulverized seedbed preparation, and breaking clods prior to wheat sowing.
• Shovel cultivator is standard secondary tillage equipment used for aerating soil and preparing fine tilth for wheat.
• Reaper is a mechanical harvester used for harvesting standing wheat crop at maturity.
• Puddler is specialized equipment operated strictly under standing water in flooded fields to churn, puddle, and destroy macro-pores for creating an impermeable hardpan for wetland transplanted paddy/rice. It is never used in upland wheat cultivation.

Agricultural engineering human power calculations:

• Under ideal continuous agricultural working conditions, one adult human laborer generates approximately $0.1\text{ hp}$ of power ($0.0746\text{ kW}$ or $74.57\text{ W}$).
• Total work performed by $20$ laborers working for $6\text{ hours}$:
  Total labour time $= 20 \times 6 = 120\text{ person-hours}$.
• Energy in horsepower-hours (hp.h):
  $\text{Energy} = 120 \times 0.1\text{ hp} = 12\text{ hp}\cdot\text{h}$ (matches Statement C).
• Energy in kilowatt-hours (kWh):
  $\text{Energy} = 12\text{ hp}\cdot\text{h} \times 0.7457\text{ kW/hp} = 8.9484\text{ kWh} \approx 8.94\text{ kWh}$ (matches Statement A).