Weed Control
Bayani Gaba-gaba
A weed is simply a plant growing where the farmer does not want it, and that is enough to make it an enemy of the crop. Weeds steal the same light, water, nutrients and root space the crop needs, so a field left unweeded can lose much of its yield long before harvest. Some weeds do worse still: the witchweed Striga actually attaches to the roots of maize and sorghum and feeds on the crop directly.
In this lesson you will meet a named local weed, learn how it harms a crop and how it spreads, and then work through the three routes a farmer can take to control it: cultural, mechanical and chemical. You will learn the difference between selective and non-selective herbicides, when each is used, and how to weigh up the cost, the labour and the risk of pollution so that you can suggest the right method for a given farm.
Manufura
- (a) identify one named local weed species of a crop and describe its harmful effects and the mode of spread.
- (b) explain methods of weed control including cultural, mechanical and chemical methods.
Takardar Darasi
Akwai a cikin manhajar Green Bridge
Zazzage manhajar Green Bridge CBT a wayar ka ko kwamfyuta ka don samun cikakkiyar bayanan darasi, tambayoyin aiki, da ƙari.
Nazarin Darasi
Barka da kammala darasi akan Weed Control. Yanzu da kuka bincika mahimman raayoyi da raayoyi, lokaci yayi da zaku gwada ilimin ku. Wannan sashe yana ba da ayyuka iri-iri Tambayoyin da aka tsara don ƙarfafa fahimtar ku da kuma taimaka muku auna fahimtar ku game da kayan.
Za ka gamu da haɗe-haɗen nau'ikan tambayoyi, ciki har da tambayoyin zaɓi da yawa, tambayoyin gajeren amsa, da tambayoyin rubutu. Kowace tambaya an ƙirƙira ta da kyau don auna fannoni daban-daban na iliminka da ƙwarewar tunani mai zurfi.
Yi wannan ɓangaren na kimantawa a matsayin wata dama don ƙarfafa fahimtarka kan batun kuma don gano duk wani yanki da kake buƙatar ƙarin karatu. Kada ka yanke ƙauna da duk wani ƙalubale da ka fuskanta; maimakon haka, ka kallesu a matsayin damar haɓaka da ingantawa.
- Which of the following best describes a weed? A. A plant grown for food B. A plant growing where it is not wanted C. A plant that fixes nitrogen D. A plant resistant to herbicides Answer: B
- Striga is a serious weed of maize and sorghum because it: A. Only grows on paths B. Is a parasite that attaches to the crop's roots C. Improves the soil D. Cannot produce seeds Answer: B
- A herbicide that kills certain weeds but not the crop is described as: A. Non-selective B. Systemic C. Selective D. Contact Answer: C
- Which method of weed control is an example of cultural control? A. Hand hoeing B. Spraying a herbicide C. Crop rotation D. Ploughing Answer: C
- A systemic herbicide is more effective than a contact herbicide on a deep-rooted weed because it: A. Works only on the leaves B. Is cheaper C. Is carried through the plant and kills the roots D. Evaporates quickly Answer: C
Akwai a cikin manhajar Green Bridge
Zazzage manhajar Green Bridge CBT a wayar ka ko kwamfyuta ka don samun cikakkiyar bayanan darasi, tambayoyin aiki, da ƙari.
Akwai a cikin manhajar Green Bridge
Zazzage manhajar Green Bridge CBT a wayar ka ko kwamfyuta ka don samun cikakkiyar bayanan darasi, tambayoyin aiki, da ƙari.
Littattafan da ake ba da shawarar karantawa
Yi Aikin Tambayoyin Gwaji
Kana son yin aikin tambayoyin gwaji kan Weed Control? Sauke manhajar Green Bridge CBT don samun tambayoyin gwaji da cikakkun jarrabawa akan wannan batu.
Sauke Manhajar Daga Google Playstore
Duk abin da kake buƙata don yin fice a JAMB, WAEC & NECO.
