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 75 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
Great answer, keep it coming :)

parshano

  • Member
  • Posts: 333
Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

« previous next »
 

Did you know?

Illicit drug use costs the United States approximately $181 billion every year.

Did you know?

There are immediate benefits of chiropractic adjustments that are visible via magnetic resonance imaging (MRI). It shows that spinal manipulation therapy is effective in decreasing pain and increasing the gaps between the vertebrae, reducing pressure that leads to pain.

Did you know?

Dogs have been used in studies to detect various cancers in human subjects. They have been trained to sniff breath samples from humans that were collected by having them breathe into special tubes. These people included 55 lung cancer patients, 31 breast cancer patients, and 83 cancer-free patients. The dogs detected 54 of the 55 lung cancer patients as having cancer, detected 28 of the 31 breast cancer patients, and gave only three false-positive results (detecting cancer in people who didn't have it).

Did you know?

Many people have small pouches in their colons that bulge outward through weak spots. Each pouch is called a diverticulum. About 10% of Americans older than age 40 years have diverticulosis, which, when the pouches become infected or inflamed, is called diverticulitis. The main cause of diverticular disease is a low-fiber diet.

Did you know?

In the United States, there is a birth every 8 seconds, according to the U.S. Census Bureau's Population Clock.

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
Animal carcasses like this South African wildebeest provide important nutrition for both hunters and Animal carcasses like this South African wildebeest provide important nutrition for both hunters and
The “Infertility Belt” In certain countries in Central Africa, infertility rates are as high as 30% The “Infertility Belt” In certain countries in Central Africa, infertility rates are as high as 30%
One of the reasons I went to Cambodia was to interview a feral child—the boy shown here—who ... One of the reasons I went to Cambodia was to interview a feral child—the boy shown here—who ...
13 Reasons Why 13 Reasons Why
Herbicide-resistant weeds Herbicide-resistant weeds
Video: Virtual Tour of the Eye Animation

For a complete list of videos, visit our video library