Practical/Applied Agriculture and Field Skills
Practical/Applied Agriculture and Field Skills
This domain tests field operations and laboratory routines: seed testing, soil sampling, nursery raising, transplanting, fertilizer application, pest scouting, spray safety and record keeping. Questions reward correct sequence and measurement.
Core rules
- Soil sampling should be representative: collect from several points in a zigzag or grid, avoid bunds, channels and fertilizer bands, sample at 0-15 cm for surface soil, mix and quarter to a labelled composite.
- Seed germination percentage = normal seedlings / seeds tested x 100. Abnormal seedlings and dead seeds are not counted as germinated. Adjust seed rate when actual germination differs from the tag.
- Transplanting requires a firm seedbed, adequate moisture and minimal root disturbance. Fertilizer should be placed correctly, not dumped on the surface or in direct contact with seed.
- Spray operators need PPE, correct dose, clean water, calibrated equipment and observance of the pre-harvest interval.
Worked example
A germination test uses 400 seeds: 360 produce normal seedlings, 20 are abnormal and 20 are dead. Germination = 360/400 x 100 = 90%. If the seed tag states 95% germination and the target seed rate is 100 kg/ha, adjusted rate = 100 x 95/90 = 105.6 kg/ha. The reasoning compares actual with tagged germination and raises the sowing rate because fewer seeds will produce normal seedlings.
Traps
Do not count abnormal seedlings as germinated. A single soil sample from one spot is not a composite sample. Do not mix fertilizer with wet seed or place urea directly against seed. Spraying without calibration risks underdose or phytotoxicity. Record dates, doses and field observations immediately.