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

Author Question: When only synthetic fertilizers are used on a crop, the quantity used needs to be increased over ... (Read 51 times)

james0929

  • Hero Member
  • *****
  • Posts: 586
on: Aug 27, 2018
When only synthetic fertilizers are used on a crop, the quantity used needs to be increased over time because ________.
 
  A) they are washed away by seasonal rains, but residual fertilizers remain
  B) organisms in the soil develop a resistance to these fertilizers
  C) more and more genetically engineered crops are being planted
  D) synthetic fertilizers provide no organic bulk

Question 2

Ozone, O3, is ________.
 
  A) a pollutant
  B) a naturally occurring compound
  C) an elemental material
  D) all of the above


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

kardosa007

  • Sr. Member
  • ****
  • Posts: 300
Reply #1 on: Aug 27, 2018
Answer to Question 1

D

Answer to Question 2

D


james0929

  • Member
  • Posts: 586
Reply 2 on: Aug 27, 2018
Excellent

Viet Thy

  • Member
  • Posts: 329
Reply 3 on: Yesterday
Gracias!

« previous next »
 

Did you know?

About 80% of major fungal systemic infections are due to Candida albicans. Another form, Candida peritonitis, occurs most often in postoperative patients. A rare disease, Candida meningitis, may follow leukemia, kidney transplant, other immunosuppressed factors, or when suffering from Candida septicemia.

Did you know?

About 100 new prescription or over-the-counter drugs come into the U.S. market every year.

Did you know?

Barbituric acid, the base material of barbiturates, was first synthesized in 1863 by Adolph von Bayer. His company later went on to synthesize aspirin for the first time, and Bayer aspirin is still a popular brand today.

Did you know?

The Romans did not use numerals to indicate fractions but instead used words to indicate parts of a whole.

Did you know?

Every 10 seconds, a person in the United States goes to the emergency room complaining of head pain. About 1.2 million visits are for acute migraine attacks.

Deforestation and increased road-building in the Amazon Rainforest are a significant concern because Deforestation and increased road-building in the Amazon Rainforest are a significant concern because
Effects of Therapy for Stuttering A functional MRI scan shows regions of the superior temporal lobe Effects of Therapy for Stuttering A functional MRI scan shows regions of the superior temporal lobe
Remedies for insomnia include increased physical exercise and time spent outdoors. Remedies for insomnia include increased physical exercise and time spent outdoors.
Testing Infant’s Understanding of Quantity Testing Infant’s Understanding of Quantity
DOT placarding requirements: Table 1 materials must be placarded in any quantity, and Table 2 ... DOT placarding requirements: Table 1 materials must be placarded in any quantity, and Table 2 ...
Crystal structure of a synthetic Holliday junction Crystal structure of a synthetic Holliday junction
Video: Optic Nerve and Optic Disk Animation (Part 2 of 2)

For a complete list of videos, visit our video library