Question

Consider the following statements regarding the weaver's method of crop combination.

A) He proposed a method of analysis superior to the simple inspection of the relative weights of the enterprises in a given area.

B) He added a time dimension to the notion that Britain's best and worst agricultural land has not changed during the last century.

C) He sought to find the number of enterprises that minimized the difference between the actual and theoretical enterprise combinations.

D) He adopted a measure of yield defined as the potential production of one acre of good average farmland under good management.

Choose the correct answer from the options given below:

1. A, B and C only
2. A, C and D only
3. A and B only
4. A and C only

Answer 1

Correct Answer - Option 4 : A and C only

Crop combination.:

• It is related to the diversity of crops grown in a particular area at a specific time
• It is the main basis of agricultural regionalization
• Crop combination also helps to understand the crop distribution in an area
• It helps to understand the density and concentration of individual crops and their assemblage in a region
• Sometimes livestock was also taken into consideration for the ranking
• There are two methods of crop combination
• Arbitrary choice method
• Statistical method
• The methods suggested by J. C. Weaver, Doi, and Rafiullah all are statistical methods of crop combination

Crop combination by J. C. Weaver:

• J. C. Weaver proposed a scheme of crop combination in 1954
• It was based on a statistical analysis
• Here he used the variance and standard deviation method 
• Collect the data about the total cropped area of a region
• Identify the area under each crop
• Calculate the percentage using the formula
• Percentage of area = (area under each crop/total cropped area)*100
• Based on the percentage do the ranking

Calculate the variance and standard deviation

Crop	The area under each crop (hector)	Total cropped area (hector)	Percentage	Rank
Rice	110		55	1
Wheat	50		25	2
Gram	20	200	10	3
Bajra	14		7	4
Maize	6		3	5

The following table is the full calculation of crop combination after Weaver

CCR	MONOCULTURE	2 CROP REGION		3 CROP REGION			4 CROP REGION				5 CROP REGION
CROP	RICE	RICE	WHEAT	RICE	WHEAT	GRAM	RICE	WHEAT	GRAM	BAJRA	RICE	WHEAT	GRAM	BAJRA	MAIZ
THEORETICAL %	100	50	50	33.33	33.33	33.33	25	25	25	25	20	20	20	20	20
ACTUAL %	55	55	25	55	25	10	55	25	10	7	55	25	10	7	3
d	45	5	25	21.67	8.33	23.33	30	0	15	18	35	5	10	13	17
d^2	2025	25	625	469.59	69.39	544.29
<!--[if gte msEquation 12]>𝑑2𝑛<![endif]--><!--[if !msEquation]-->(∑d^2 )/n<!--[endif]-->	2025	325		361.09
√((∑d^2 )/n)	45	18.03		19.00

So the area is the two-crop region. Therefore the correct options are