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Agriculture for Secondary Schools
Variety (in crops) crop rotation or using ground cover
a special type of plant within a larger to suppress weed growth
group of plants, all of the same kind,
but with different features, like size, Weed
colour or taste unwanted plant that competes with
crops for nutrients, water, and light
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Ventilation
allowing fresh air to enter and move Weighing tape
around an enclosed space, e.g., animal a special tape used around the animal’s
houses or storage places to keep them chest to estimate its weight when scales
dry and healthy are not available
Whey
Vice the liquid part left after curdling milk
a bad or unnatural, or undesirable habit
of an animal Winnowing
a method of cleaning crop grains by
Water management using a winnowing basket or wind to
the process of managing water remove light chaff and dirt
resources to ensure crops receive
enough water for growth; this may Yellow mottle disease
involve irrigation or relying on rainfall a disease caused by rice yellow
patterns mottle virus; the virus disease can be
transmitted by mechanical inoculation
Water table or vectored by the adult beetle Sesselia
the upper surface of ground water and pusilla; it is characterised by stunting
the level below it where the soil is and reduced tillering of the infected
saturated with water rice plant
Waterlogged (of land) Yield potential
a condition where excessive water the maximum grain yield of a given
saturates the soil, depriving plant roots variety in a given environment without
of oxygen and leading to poor growth constraints involving water, nutrients,
or plant death competition, pests, diseases, or climatic
Weaning conditions
the gradual stopping of milk feeding Yield sustained
for calves, usually between 4 and 6 a continual annual or periodic yield of
months of age, as they begin to eat plants or plant material from a given
solid feed area; this implies that the management
Weed control/management practices are such that they will
methods used to prevent or eliminate maintain the productive capacity of
weeds (unwanted plants) that compete the land
with crops for nutrients, light, and Zero grazing
water; this can involve physical a system where cattle are kept indoors
removal, the use of herbicides or and fed in the shed
other techniques such as mulching,
Student’s Book Form Three 247
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AGRICULTURE F3.indd 247 17/09/2025 14:12
AGRICULTURE F3.indd 247
