This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: Discuss at least five reasons why weeds are the most important pest to crops. What will be an ... (Read 70 times)

melina_rosy

  • Hero Member
  • *****
  • Posts: 531
on: Jul 21, 2018
Discuss at least five reasons why weeds are the most important pest to crops.
 
  What will be an ideal response?

Question 2

Biodiesel, biomass, methane, and ___________________ _ are the most common forms of biofuel.
 
  Fill in the blank(s) with correct word


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

mohan

  • Sr. Member
  • ****
  • Posts: 362
Reply #1 on: Jul 21, 2018
Answer to Question 1

Weeds reduce the yield of cultivated crops by competing for essential resources. Weeds increase production costs during their control. Some weeds are allelopathic. Some weeds are parasitic and obtain their nutrients directly from other plants. Weeds devalue the primary crop. Weeds may contain toxins in their herbage that is harmful to livestock. Weeds compete with crops for light, water, and minerals. In annual cropping systems, effective competitors for light often have high levels of seedling vigor that allow for development of a weed canopy above the crop. The effect of weeds on crop growth and yield is typically greatest during crop establishment. Tall-growing weeds overgrow the crop and reduce the intensity and quality of the light received by the crop.

Answer to Question 2

ethanol


melina_rosy

  • Member
  • Posts: 531
Reply 2 on: Jul 21, 2018
Thanks for the timely response, appreciate it

parker125

  • Member
  • Posts: 332
Reply 3 on: Yesterday
Excellent

« previous next »
 

Did you know?

A seasonal flu vaccine is the best way to reduce the chances you will get seasonal influenza and spread it to others.

Did you know?

In 1864, the first barbiturate (barbituric acid) was synthesized.

Did you know?

Children with strabismus (crossed eyes) can be treated. They are not able to outgrow this condition on their own, but with help, it can be more easily corrected at a younger age. It is important for infants to have eye examinations as early as possible in their development and then another at age 2 years.

Did you know?

Not getting enough sleep can greatly weaken the immune system. Lack of sleep makes you more likely to catch a cold, or more difficult to fight off an infection.

Did you know?

Disorders that may affect pharmacodynamics include genetic mutations, malnutrition, thyrotoxicosis, myasthenia gravis, Parkinson's disease, and certain forms of insulin-resistant diabetes mellitus.

Examples of structures in which extensive surface area is important for function. Examples of structures in which extensive surface area is important for function.
It is important to ask patients what other health care providers they are seeing, such as the dentis It is important to ask patients what other health care providers they are seeing, such as the dentis
Anatomically modern humans left archaeological clues, including evidence of burials, which indicate Anatomically modern humans left archaeological clues, including evidence of burials, which indicate
Increasing access to care for teen mothers is important because they have a higher rate of pregnancy ... Increasing access to care for teen mothers is important because they have a higher rate of pregnancy ...
Hydrolysis reactions for some biochemically important phosphate compounds (part 2) Hydrolysis reactions for some biochemically important phosphate compounds (part 2)
Dad is important to me Dad is important to me
Video: Bacteriophage (Virus) - Mice Experiment

For a complete list of videos, visit our video library