Agronomy3 Flashcards
(99 cards)
1
Q
living in or on another living organism.
A
Parasitic
2
Q
the development of a new individual from a germ cell without
fertilization.
A
Parthenogenesis
3
Q
living more than one year but in some cases, producing seed in the first year
and every season thereafter
A
Perennial
4
Q
a flower having both pistil and stamen.
A
Perfect flower
5
Q
- the designation for degree of acidity or hydrogen-ion activity.
A
pH
6
Q
the organism as exemplified by its expressed characters.
A
Phenotype
7
Q
the hours of daylight effective in causing physiological changes in plants.
A
Photoperiod
8
Q
the response of plants to different day lengths or light periods
A
Photoperiodism
9
Q
the growing or turning toward the light. The influence of light on the
direction of the different plant parts of a plant tends to grow.
A
Phototropism
10
Q
the arrangement of leaves upon the stem.
A
Phyllotary
11
Q
the seed-bearing organ of a flower consisting of the ovary, style and stigma.
A
Pistil
12
Q
provided with pistils but without stamens.
A
Pistillate
13
Q
any organism belonging to the plant or vegetable kingdom.
A
Plant
14
Q
the male germ cells produced in the anther.
A
Pollen
15
Q
the transfer of pollen from the anther of the stamen to the stigma of the
pistil.
A
Pollination
16
Q
a main root
A
Primary root
17
Q
the capability of a soil to produce a specified plant or sequence of
plants under a specified system of management.
A
Productivity (of soil)
18
Q
a vertical cross section of the soil through all its horizons and extending into the
parental material.
A
Profile
19
Q
a strain of organism that is genetically pure because of continued inbreeding,
self fertilization, or other means.
A
Pure line
20
Q
- fruit production without sexual fertilization.
A
Parthenocarpy
21
Q
- the science or study of disease, its causes, and its controls.
A
Pathology
22
Q
- splitting of water into H+ and OH-
, utilizing solar energy in the light reactions
of photosynthesis.
A
Photolysis
23
Q
- the flowering response of a plant in relation to the relative
length of light and dark periods, usually in terms of 24-hour day.
A
Photoperiodic response
24
Q
the production of ATP using the energy of light - excited -
electrons produced in the light reactions of photosynthesis.
A
Photophosphorylation
25
the process of converting water and carbon dioxide into sugar using
chlorophyll and light energy, accompanied by the production of oxygen by green plants.
Photosynthesis
26
a tube-like structure developed by the tube nucleus in the microspore that
helps guide the sperm and endosperm nuclei through the stigma and style to the embryo
sac.
Pollen tube
27
a condition in which a plant has somatic cells with more than 2N
chromosomes per nucleus.
Polyploidy
28
a pesticide or herbicide spray that is after the crop has emerged
from the soil.
Post emergence spray
29
the timing of a chemical treatment applied before seedlings have
appeared above the soil surface
Pre-emergence
30
irrigation before final seedbed preparation and planting; a method to
insure adequate moisture for the
germination of crop seeds.
Pre-irrigation -
31
the transplanting of seedlings from a seeded plot to a wider spacing when
they are in the cotyledon stage or have a couple of three leaves.
Pricking off -
32
- the removal of the first fruits, roots or tubers that develop on a plant leaving the
remainder to mature.
Priming
33
the crop harvested from regrowth as in sugarcane
Ratoon
34
genus of bacteria that live symbiotically in the roots of legumes and fix
nitrogen that is used by plants.
Rhyzobium
35
– in asexual propagation, where the scion is attached to develop a new plant.
Rootstock
36
used in reference to the allelic form of a unit of heredity that, when present in
a heterozygous condition is not expressed.
Recessive
37
a crop which is planted in shortly before the first crop is to be harvested.
Relay crop
38
the degree of acidity or alkalinity of the soil expressed as pH.
Reaction
39
the replacement of soil about individual plants or a row of plants after some
soil has been removed from that location
Rehilling
40
the process of absorption of oxygen and giving out carbon dioxide.
Respiration
41
a subterranean stem, usually rooting at the nodes and rising at the apex; a
rootstock.
Rhizome
42
erosion producing small channels that can be obliterated by tillage.
Rill erosion
43
the part of the plant.
Root
44
living on dead organic matter.
Saprophytic
45
the ripened ovule enclosing a sedimentary plant and the food necessary for its
germination.
Seed
46
separation of hybrid progenic into the different hereditary types
representing the combination of the character of the two parents.
Segregation
47
- the choosing of plants having certain characteristics for propagation
Selection
48
- pollinated by pollen from same plant.
Selfed
49
a root arising from the base of the hypocotyl.
Seminal root
50
erosion by removal of a more or less uniform layer of material from the
land surface.
Sheet erosion
51
offspring of the same parental plants
Siblings -
52
forage preserved in a succulent condition by partial fermentation in a tight
container.
Silage
53
small soil particles of a diameter of 0.002 to 0.05 mm.
Silt
54
the first generation hybrid between 2 inbred lines.
Single cross
55
plowed meadow of pasture.
Sod
56
this is done by planting short season, drought tolerant crops after
rice, more especially upon failure of the rice crop due to pests.
Sequential planting
57
the natural medium for the growth of land plants on the surface of the earth,
composed of organic and mineral materials.
Soil
58
- the upper part of the soil profile, the A and B horizons.
Solum
59
to place seed in a position for growing.
Sow
60
single-celled reproductive bodies produced by fungi.
Spore
61
the pollen-bearing organ of a flower.
Stamen
62
having stamens but no pistils.
Staminate
63
a liquid that contains dissolved fertilizer nutrients and is applied to
plants to facilitate growth.
Starter solution
64
- a supply of seed of a crop variety.
Stock
65
- a modified propagating, creeping stem above ground that produces roots.
Stolon
66
- a group of plants derived from variety.
Strain
67
- the dried remnants of fine stemmed plants from which the seed had been
removed.
Straw
68
the basal portion of the stems of plants left standing after cutting.
Stubble
69
that part of solum below plow depth or below the A horizon.
Subsoil
70
a tiller. A shoot produced from a crown or rhizomes or in tobacco, from auxillary
buds.
Sucker
71
the upper 12 inches or 30 cm of the soil, or in arable soils, the depth
commonly stirred by the plow.
Surface soil
72
- the fixation of nitrogen by bacteria infesting the roots of
legumes while benefiting the legume crop.
Symbiotic nitrogen fixation
73
a soil containing excessive amounts of soluble salts.
Saline soil
74
the aerial part of a plant that is transferred to a new rootstock in grafting.
Scion
75
the union of two haploid gametes to yield a single diploid zygote.
Sexual fertilization
76
the tendency of soil particles to clump together or form aggregates.
Soil structure
77
the relative proportions of sand, silt, and clay particles in soil.
Soil texture
78
an inflorescence, common in the grass family, that has a central axis on which
sessile spikelete are born
Spike
79
stem of a grass plant, which is a complete plant by itself.
Tiller
80
used in reference to the overall physical condition of a soil, frequently regarding its
suitability as a seedbed.
Tilth
81
a specific case of polypecidy in which there are 3N chromosomes
Triploid
82
- a single central root.
Taproot -
83
- the staminate inflorescence of maize composed of panicle spikes.
Tassel
84
the science of classification.
Taxonomy
85
a leaflet or stem modified for climbing or anchorage, as in the pea.
Tendril
86
having four times the primary chromosome member.
Tetraploid
87
the surface soil, usually the plow depth of the A horizon.
Topsoil
88
the loss of moisture through the leaves
Transpiration
89
- small plant grown in a plant bed or flat, or are removed from a seeded row
for resetting in a new location.
Transplants
90
- a short, thickened subterranean branch.
Tuber
91
- containing either stamens or pistils, but not both.
Unisexual
92
- the occurrence of differences among individuals of a species or variety.
Variation
93
a group of individuals within a species that differ with the rest of the species
Variety
94
in biology, a carrier. is generally an insect that carries pollen or diseasecausing organism from plant to plant.
vector
95
ultramicroscopic protein bodies, the presence of certain types of which cause
mosaic and other diseases in plant tissue.
96
a plant that in its location is more harmful than beneficial.
Weed
97
a plant adapted to arid conditions
Xerophyte
98
the woody part of a fibrovascular bundle containing vessels; the water-conducting
tissue.
Xylem
99
product of united gametes.
Zygote
