Crop Management Factors Quiz

What is the purpose of determining the crop management factor C?

To reflect the combined effect of various crop management practices.

How is the factor C computed for a particular crop?

By computing the ratio of soil loss from cropped plot to the corresponding soil loss from a continuous fallow land for each crop stage separately.

What does the value of factor C indicate?

It reflects the effectiveness of crop management practices in reducing soil loss.

How is the Support Practice Factor (P) defined?

It is the ratio of soil loss with a support practice to that with straight row farming up and down the slope. Signup and view all the answers

Explain the difference between Period 2 and Period 3 in the crop growth stages.

Period 2 is the establishment phase, ranging from 1 to 2 months after seeding, while Period 3 is the growing period from seeding to crop harvesting. Signup and view all the answers

What is Period 4, as mentioned in the text?

Period 4 is the residue or stubble phase, ranging from crop harvesting to summer ploughing or new seed bed preparation. Signup and view all the answers

What is the formula for calculating the LS factor according to Wischmeier and Smith (1962)?

LS = 0.065 + 0.045S + 0.006L Signup and view all the answers

How is the LS factor calculated in the M.K.S. system based on the observations mentioned by Wischmeier and Smith (1978)?

LS = 0.2λ^m sinθ Signup and view all the answers

Define the crop management factor C.

The expected ratio of soil loss from a cropped land under specific crop to the soil loss from a continuous fallow land, considering identical soil type, slope, and rainfall conditions. Signup and view all the answers

How is erosion control effectiveness evaluated for different crops and cropping practices?

Based on the five recommended crop stages introduced by Wischmeier (1960). Signup and view all the answers

What does the period 1 (Seed Bed) refer to in the evaluation of erosion control effectiveness?

The period from seeding to one month thereafter. Signup and view all the answers

How do crops and cropping practices impact soil erosion?

They affect soil erosion through factors like crop type, cover quality, root growth, and water use by plants. Signup and view all the answers

What are the sub-factors used to calculate the cover management term (C) in the Modified Universal Soil Loss Equation (MUSLE)?

Considerations of prior land use, crop canopy, surface cover, and surface roughness Signup and view all the answers

How was the USLE modified to create the Modified Universal Soil Loss Equation (MUSLE)?

By replacing the rainfall energy factor (R) with a factor known as the 'runoff factor' Signup and view all the answers

What does the MUSLE equation help model in terms of sediment yield?

Sediment yield from individual storms Signup and view all the answers

Why is the MUSLE considered advantageous from a modeling perspective?

It can model daily, monthly, and annual sediment yields of a watershed by combining hydrological models Signup and view all the answers

What does the peak rate of runoff (qp) represent in the MUSLE equation?

Sediment transport Signup and view all the answers

How does the MUSLE model contribute to increasing sediment yield prediction accuracy?

By considering Q as the detachment process and qp as sediment transport Signup and view all the answers