Which of the following factors has the greatest influence on crop production?
Light
Vegetation
Water
Air movement
Pressure
Correct answer is A
No explanation has been provided for this answer.
Flood irrigation is mainly used in
Arid area
Subtropical area
Tropical area
Sloppy area
Savanna area
Correct answer is A
No explanation has been provided for this answer.
Crop rotation has the following effects on the soil except
Maintenance of soil fertility
Reducing concentration of soil pests
Improving soil structure
Reducing soil erosion
Predisposing soil to leaching
Correct answer is E
No explanation has been provided for this answer.
Leaching of soil nutrients
Very low pH value of land
Lack of soil microbes
High alkalinity of soil
Erosion of the soil
Correct answer is A
No explanation has been provided for this answer.
A soil with pH2 can be described as
Moderately acidic
Moderately alkaline
Neutral
Highly alkaline
Highly acidic
Correct answer is D
No explanation has been provided for this answer.