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ABE 2 First Exam > Module 8: Weeders > Flashcards

Module 8: Weeders Flashcards

1
Q

providing crops the conditions that will make them free of weeds, pests and diseases

A

crop protection

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2
Q

weeds compete with the available ________ and __________ if left uncontrolled

A

moisture and nutrients

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3
Q

if left uncontrolled, pests and diseases multiply above the economic threshold levels

true or false

A

true

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4
Q

most vulnerable period of the crop

A

growing stage between planting and flowering

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5
Q

methods of pest control

A
  • cultural
  • ecological
  • biological
  • physiological
  • chemical
  • flame
  • mechanical
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6
Q

methods of pest control

modification of cultural practices such as time of planting and crop rotation

A

cultural

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7
Q

methods of pest control

change in the envi of the crop and the pest which favors the survival of the crop such as flooding to kills insects and weeds

A

ecological

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8
Q

methods of pest control

intro of certain insects which feed on pest, application of chemo-sterilants to render the male sterile, or planting of certain plants whose odor drive pests away

A

biological

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9
Q

methods of pest control

breeding and planting of pest resistant varieties

A

physiological

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10
Q

methods of pest control

application of chemicals to control weeds, pests and diseases

A

chemical

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11
Q

methods of pest control

use of flame for the selective burning of weeds in crops whose stem is not injured by a short exposure to intense heat

A

flame

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12
Q

methods of pest control

use of tools, implements and machines to reduce or eliminate weeds and insects such as in land preparation, cultivation and weeding

A

mechanical

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13
Q

unwanted plans growing in a field competing with the main crop for nutrients, moisture and sunlight

A

weeds

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14
Q

one of the most important crop protection operations

A

weeding

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15
Q

in lowland rice production, weeding is done 1-2 weeks after transplanting

true or false

A

true

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16
Q

weeding is repeated __-__ weeks after 1st weeding

A

2-3 weeks

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17
Q

a serious threat to agricultural crops

A

weeds

18
Q

negative effects of weeds

A
  • serve as a breeding ground for pests
  • compete with the crop for water, sunlight, and nutrients
  • yield losses due to uncontrolled weeds alone are significantly high
19
Q

implement/machine used to remove or destroy the weeds from an agricultural land

A

weeders

20
Q

classification of weeders according to the design of soil working part

A
  1. blade type
  2. tine type
  3. rotary type
21
Q

classification of weeders according to the design of soil working part

cutting edges sharpened and hardened for soil cutting and weed uprooting

A

blade type

22
Q

classification of weeders according to the design of soil working part

steel rods sharply pointed and hardened at the soil working end

A

tine type

23
Q

classification of weeders according to the design of soil working part

curved spikes or paddles attached radially to a common axle which rotates when pushed forward to uproot and bury weeds

A

rotary type

24
Q

classification of weeders according to power source

A
  1. manually-operated weeders
    a. hand-held weeders
    b. push-type weeders
  2. animal-drawn weeders
  3. tractor-drawn weeders
  4. power weeder
25
Q

classification of weeders according to power source

2 types of manually-operated weeders

A
  1. hand-held weeders
  2. push-type weeders
26
Q

classification of weeders according to power source - manually-operated weeders

utilize the blade and tine type of soil working parts with short medium and long handles

A

hand-held weeders

27
Q

sizes of the soil working parts of hand-held weeders

A

<0.5m ; <1m ; >1m

28
Q

classification of weeders according to power source - manually-operated weeders

utilize any three types of soil working parts for upland and lowland weeding

A

push-type weeders

29
Q

classification of weeders according to power source

soil working parts are mounted on a frame or toolbar pulled by animal for upland weeding

A

animal-drawn weeders

29
Q

classification of weeders according to power source

soil working parts are mounted on frame or tool bar pulled by a 2-wheel or 4-wheel tractor for upland weeding

A

tractor-drawn weeders

30
Q

classification of weeders according to power source

rotary type weeder driven by its own engine for lowland weeding

A

power weeder

31
Q

lowland weeders

A
  • single-row, double rotor, claw weeder
  • single rotor, claw weeders (2-row & 3-row)
  • claw paddle weeders (single row & double row)
  • spin tillers (single row & double row)
  • cono weeders (single row & double row)
  • power weeder
32
Q

upland weeders

A
  • peg-type upland weeder
  • roller weeder
  • weeding hand tools
  • scraper wheel toe
  • wheel cultivator
33
Q

represents the weeding efficiency

A

weeding index

34
Q

ratio between the no. of weeds removed/destroyed by a weeder to the number originally present in a unit are expressed in percentage

A

weeding index

35
Q

sampling area when determining weeding index , this is to be selected randomly in the field

A

1 square meter

36
Q

percentage of plants injured (teared leaves, broken stems and/or uprooted plant during the weeding operation

A

percent damaged plants

37
Q

indicates the performance of a weeder

A

performance index

38
Q

this is directly proportional to the are per unit time, the weeding index and the quality of work

A

performance index

39
Q

performance index is inversely proportional to the power required

true or false

A

true

40
Q
A

ABE 2 First Exam (11 decks)

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