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 78 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

Missbam101

  • Member
  • Posts: 341
Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

« previous next »
 

Did you know?

On average, someone in the United States has a stroke about every 40 seconds. This is about 795,000 people per year.

Did you know?

Stevens-Johnson syndrome and Toxic Epidermal Necrolysis syndrome are life-threatening reactions that can result in death. Complications include permanent blindness, dry-eye syndrome, lung damage, photophobia, asthma, chronic obstructive pulmonary disease, permanent loss of nail beds, scarring of mucous membranes, arthritis, and chronic fatigue syndrome. Many patients' pores scar shut, causing them to retain heat.

Did you know?

Children of people with alcoholism are more inclined to drink alcohol or use hard drugs. In fact, they are 400 times more likely to use hard drugs than those who do not have a family history of alcohol addiction.

Did you know?

The term bacteria was devised in the 19th century by German biologist Ferdinand Cohn. He based it on the Greek word "bakterion" meaning a small rod or staff. Cohn is considered to be the father of modern bacteriology.

Did you know?

A strange skin disease referred to as Morgellons has occurred in the southern United States and in California. Symptoms include slowly healing sores, joint pain, persistent fatigue, and a sensation of things crawling through the skin. Another symptom is strange-looking, threadlike extrusions coming out of the skin.

ABO Blood Reactions Are Important in Transfusions ABO Blood Reactions Are Important in Transfusions
Reasons for Denied Claims and Solutions Reasons for Denied Claims and Solutions
Important Trace Elements in the Body Important Trace Elements in the Body
Remote sensing and GIS are important tools Remote sensing and GIS are important tools
Major Agricultural Crops Produced in the United States, 2011 Major Agricultural Crops Produced in the United States, 2011
Herbicide-resistant weeds Herbicide-resistant weeds
Video: How do the different types of chromatography work? (No Audio)

For a complete list of videos, visit our video library