Agriculture Reference
In-Depth Information
succulent fruit
a soft, fleshy fruit
sustainable
an action or process which provides the best for the environment and
people, socially and economically, both new and indefinitely into the future
symptoms
a visible feature that is characteristic of a disease-causing organism or agent
taproot
a single large root, derived from the radicle
tender
a plant able to survive temperatures 1-5°C. Tolerant of low temperatures but
will not survive frost.
tepal
a fused petal and sepal found in monocotyledonous flowers
thorn
a sharp pointed branch or shoot modified for defence
tilth
the crumb structure of the seedbed
tissue
a collection of cells carrying out a specific function
top dressing
a fertilizer applied to the surface of soils
topsoil
an upper layer (horizon) of soil (above the subsoil and below the litter
layer) normally moved during cultivation. It is typically 10-40 cm deep and
darkened by the decomposed organic matter it contains.
transpiration
the evaporation of water vapour from the leaves and other plant surfaces
transpiration pull
the main mechanism by which water moves in the xylem due to
transpiration
tree
a large woody perennial unbranched for some distance above ground, on a
single stem
tropism
a directional growth response to an environmental stimulus
tuber
a swollen underground food storage organ which may be formed from a root
or stem
variety
a general, non-botanical, term for plants which vary from the species
vascular plants
plants with conducting tissue i.e. xylem and phloem
vector
an organism (such as an aphid) that transfers viruses or pollen from plant to
plant
vegetative propagation
involves asexual reproduction and results in a clone
viable seed
seed that has the potential for germination when the required external
conditions are supplied
water-holding capacity (WHC)
the amount of water held at field capacity
weathering
the breakdown of rocks (or soil particles)
weed, annual
a weed with one life cycle in a growing season
weed, ephemeral
a weed with several life cycles in a growing season
weed, perennial
a weed that lives through several growing seasons
woody perennial
a perennial that maintains a live woody framework of stems at the end of the
growing season
xylem
the tissue which transports water and dissolved mineral nutrients from the
roots, up the stem to the leaves and other plant organs
zygote
cell resulting from the fusion of male and female gametes