9 questions. Try each one, then open the answer to check yourself and read the explanation.
The practice of cutting off the upper part of a seedling's shoot to encourage lateral growth is called
Answer: B (pruning)
Pruning removes selected parts of a plant; cutting the shoot tip removes apical dominance so side branches grow. Coppicing cuts the whole tree near the ground.
Which of the following has the highest capacity to retain nutrients?
Answer: D (Clay)
Clay has the finest particles and the largest surface area, and its charged surfaces hold on to nutrient ions, so it retains nutrients best.
In livestock production, the term "culling" refers to
Answer: B (removing unproductive animals from the herd)
Culling means removing sick, old, unproductive or undesirable animals from a herd to keep it healthy and productive.
The primary purpose of quarantine in agricultural practice is to
Answer: B (prevent spread of pests and diseases)
Quarantine keeps new or imported plants and animals isolated so that any pests or diseases they carry do not spread.
Which of the following is a leguminous cover crop?
Answer: C (Mucuna)
Mucuna is a legume grown to cover the soil; its root nodules fix nitrogen and improve soil fertility.
One major disadvantage of inbreeding in livestock is
Answer: D (high risk in genetic defects)
Mating closely related animals brings harmful recessive genes together, raising the risk of genetic defects.
Which of the following elements is a micronutrient required by plants?
Answer: A (zinc)
Zinc is needed only in tiny amounts, so it is a micronutrient; magnesium, phosphorus and calcium are macronutrients.
A major effect of overgrazing on pasture land is
Answer: D (accelerated erosion)
Overgrazing strips the plant cover, leaving soil bare so wind and rain wash it away faster.
The major reason for keeping farm records to
Answer: B (evaluate farm performance)
Records show what the farm produced, spent and earned, so the farmer can judge its performance and plan better.