Volume 04 Issue 10-2024 21 

                  

 
 

   
  
 

American Journal Of Agriculture And Horticulture Innovations  
(ISSN – 2771-2559) 
VOLUME 04 ISSUE 10    Pages: 21-27 

OCLC – 1290679216   

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Publisher: Oscar Publishing Services 

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ABSTRACT 

In this article, the influence of the relative vertical pressure force applied to the roller of the combined plowing 

machine on plowed land on its performance was determined based on theoretical and experimental experiments, and 

the results were determined. 

 

KEYWORDS 

Combined, aggregate, leveler, rolling, moisture, density, fraction, pressure, force, experimental. 

 

INTRODUCTION

Currently, pre-planting of plowed fields for planting 

repeat and winter cereals is carried out with a variety 

of separate aggregates, which leads to longer planting 

periods, loss of soil moisture and increased operating 

costs. It is possible to eliminate the shortcomings of 

plowed land by using machines that combine all the 

technological processes of preparing the soil for 

planting in one pass, including a machine equipped 

with a roller. 

of the lands perform some or all of the technological 

processes performed in the pre-planting treatment in 

one pass of the field. This leads to the reduction of the 

negative impact of tractors and agricultural machines 

  Research Article 

 

OF COMPARATIVE VERTICAL PRESSURE FORCE ON ITS PERFORMANCE 

INDICATIONS 
 

Submission Date: October 08, 2024, Accepted Date:  October 13, 2024,  

Published Date: October 18, 2024 

Crossref doi: https://doi.org/10.37547/ajahi/Volume04Issue10-05 

 

 

Mamarasulova Manirakhan Tursunboyevna 
PhD, docent, Andijan village farm and agtotechnologies institute, Andijan the city, Uzbekistan 

Makhmudov Rafiqdjon Yusupovich 
PhD, docent, Andijan Institute of Agriculture and Agrotechnologies, Pakhtabad district, Uzbekistan 

 

 

 

 

 

Journal Website: 

https://theusajournals.

com/index.php/ajahi 

Copyright: Original 

content from this work 

may be used under the 

terms of the creative 

commons attributes 

4.0 licence. 

 

https://theusajournals.com
https://doi.org/10.37547/ajahi/Volume04Issue10-05
https://doi.org/10.37547/ajahi/Volume04Issue10-05


Volume 04 Issue 10-2024 22 

                  

 
 

   
  
 

American Journal Of Agriculture And Horticulture Innovations  
(ISSN – 2771-2559) 
VOLUME 04 ISSUE 10    Pages: 21-27 

OCLC – 1290679216   

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Publisher: Oscar Publishing Services 

Servi 

on the soil, the reduction of fuel consumption, the 

increase of work quality and productivity, the 

reduction of the period of tillage, and the preservation 

of moisture accumulated in it. Combined aggregates 

and machines that combine the technologies of basic 

and pre-planting treatment to the soil are now widely 

used in developed countries with a high agricultural 

culture and allow to get a high yield of agricultural 

crops with low labor and investment. 

Currently, in foreign countries, various options of 

combined units have been created to prepare the soil 

for planting, and various disc rollers and levelers are 

used as working parts of soil cultivation. 

Pre-tillage machines perform some or all of the tillage 

processes in one pass through the field. This leads to 

the negative impact of tractors and agricultural 

machines on the soil, as well as a decrease in fuel 

consumption, an increase in the quality and 

productivity of work, a reduction in the duration of soil 

cultivation, and the preservation of moisture 

accumulated in it [1;2]. 

This paper presents theoretical and experimental 

results of vertical loading applied to a roller for 

application in a combination machine. 

The vertical load applied to the roller was determined 

from the condition that it is submerged to a specified 

depth and was generally expressed as follows (Fig. 1) 

1 2 ,Q N N= +                                                  (1) 

where N 1 is the requirement for immersing the roller 

plates into the soil 

vertical load to be achieved, N; 

N 2 - the requirement to sink the foundations of the 

roller into the ground vertical loading, N.



Volume 04 Issue 10-2024 23 

                  

 
 

   
  
 

American Journal Of Agriculture And Horticulture Innovations  
(ISSN – 2771-2559) 
VOLUME 04 ISSUE 10    Pages: 21-27 

OCLC – 1290679216   

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Publisher: Oscar Publishing Services 

Servi 

 

Figure 1. Scheme for determining the vertical load applied to the coil 

We determine the vertical load required to sink the 

planks of the roller into the soil for one plank 

completely immersed in it, and it is equal to 

1 ,пN b B=      (2) 

where s is the relative resistance of the soil to vertical 

crushing, Pa. 

s in the expression (1) by the volume compression 

coefficient of the soil, the speed of movement and the 

depth of immersion of the roller into the soil [6] 

  ( )2

0 01 ,v uq K V h = +                                                                  (3) 

where q 0 is the volume compression coefficient of the 

soil, N/m 3 ; 

К v – proportionality coefficient, s 2 /m 2 . 

 Q 

O 

N 

bn 

h
о
 



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American Journal Of Agriculture And Horticulture Innovations  
(ISSN – 2771-2559) 
VOLUME 04 ISSUE 10    Pages: 21-27 

OCLC – 1290679216   

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Publisher: Oscar Publishing Services 

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Taking (3) into account, expression (2) is written as follows 

( )2

1 0 01 .v u пN q K V h b B= +     (4) 

We can express the vertical load required to sink the foundation of the roller into the soil as follows 

2 1 ,A

a

B
N N

l

 
= + 
 

     ( 5) 

where N A is the requirement for submerging one base 

of the roller into the soil 

vertical loading, N. 

N A according to the following expression [3; 7] 

( ) ( ) ( )( ) ( )
22

0 0 0 01 2A v u a п a п a п a п aN q K V h b R h h R h h h h h h h h= + − + − + − + − − + −


 

( )
( )( ) ( )

2

0 0

0

2
arcsin .

п a п a п a

a

п a

R h h h h h h h h
R h h

R h h

− + − + − − +
− − +
− +


(6) 

Taking this into account, the expression (2.40) takes the following form 

( ) ( ) ( )( ) ( )
22

2 0 0 01 2v u a п a п a п a п aN q K V b R h h R h h h h h h h h= + − + − + − + − − + −


( )
( )( ) ( )

2

0 0

0

2
arcsin 1 .

п a п a п a

a

п a a

R h h h h h h h h B
R h h

R h h l

− + − + − − +  
− − + + 
− +  


( 7) 

N 1 and N 2 according to the expressions (4) and (7) into 

the expression (3.36), the following expression is 

derived to determine the vertical load applied to the 

coil 

( ) ( ) ( )( ) ( ) 22

0 0 0 01 2v u п a п a п a п a п aQ Bq K V h b b R h h R h h h h h h h h


= + + − + − + − + − − + −


 



Volume 04 Issue 10-2024 25 

                  

 
 

   
  
 

American Journal Of Agriculture And Horticulture Innovations  
(ISSN – 2771-2559) 
VOLUME 04 ISSUE 10    Pages: 21-27 

OCLC – 1290679216   

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Publisher: Oscar Publishing Services 

Servi 

( )
( )( ) ( )

2

0 0

0

2
arcsin 1 .

п a п a п a

a

п a a

R h h h h h h h h B
R h h

R h h l

− + − + − − +   − − + + − +    

(8) 

both sides of this expression by V , we determine the 

specific vertical load per unit span of the coil. 

( ) ( ) ( )( ) ( ) 22

0 0 0 01 2c v u п a п a п a п a п aQ q K V h b b R h h R h h h h h h h h


= + + − + − + − + − − + −


( )
( )( ) ( )

2

0 0

0

2
arcsin ,

п a п a п a

a a

п a

R h h h h h h h h
R h h n

R h h

− + − + − − +  − − + 
− +   

 (8, a ) 

where 
a

a

a

B l
n

Bl

+
= - the number of bases 

corresponding to the coverage width of 1 m of the coil, 

units/m. d k =0.1 m, h 0 =0.05 m, φ 1 =30°, φ 2 =40°, b n =0.01 

m, q 01 =2·10 6 H/m 3 , [4 , 5] K v =0.01 c 2 / m 2 , b a =0.006 

m, h p =0.04 m, h m =0.02 m, h a =0.02 m, l a =0, 25 m, n a 

=4 units/m and V u =1.75-2.25 m/s are accepted, and the 

calculations made according to the expressions mean 

that the diameter of the coil is at least 36 cm, the 

number of plates to be installed on it is 12 pieces, their 

length is 27 cm, the coil showed that the angle between 

the teeth is 90°, the step of the teeth of the planks is 4 

cm, the diameter of the roller base is 30 cm, the vertical 

load applied to each meter of coverage should be in 

the range of 1.04-1.06 kN/m [8,9] 

In the experiments, based on theoretical studies, the 

specific vertical load applied to the roller was changed 

from 500 N/m to 1100 N/m at intervals of 200 N/m, and 

the effect of these changes on its performance was 

studied. 10 pieces, the angle of installation of the 

planks relative to the axis of rotation of the roller was 

15 ° . 

The results of the experiments are presented in Figure 

2. It can be seen from them that with the increase of 

the specific vertical pressure force applied to the roller, 

the degree of crushing of the soil, that is, the amount 

of fractions with a size smaller than 25 mm in it, 

increased. This is due to the fact that with the increase 

of the vertical pressure force applied to the roller, the 

degree of soil crushing of the roller plates increases, 

and as a result, the soil is well compacted. 

Due to the above reason, the specific vertical load 

applied to the roller from 500 N/m to 1100 N/m 

increases its specific drag resistance from 203 N/m to 



Volume 04 Issue 10-2024 26 

                  

 
 

   
  
 

American Journal Of Agriculture And Horticulture Innovations  
(ISSN – 2771-2559) 
VOLUME 04 ISSUE 10    Pages: 21-27 

OCLC – 1290679216   

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Publisher: Oscar Publishing Services 

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286 N/m and from 235 N/m at speeds of 6 and 8 km/h, 

respectively. up to 309 N/m, and caused the soil density 

to increase from 1.08 g/cm 3 to 1.22 g/cm 3 and from 1.06 

g/cm 3 to 1.2 g/cm 3 , respectively [10] 

The relationships shown in Figure 2 can be expressed 

by the following empirical formulas determined by the 

method of least squares: 

a ) according to the level of soil fertility (%): 

V =6 km/h, F <25 = -8.75 Q 2 +23.3 Q +70.748, ( р 2 

=0.9528) (9) 

When V =8 km/h F <25 =-12.5 Q 2 +28 Q +68.225; ( r 2 

=0.9857) (10) 

b ) by soil density (g/cm 3 ): 

r when V =6 km/h =-0.4375 Q 2 +0.925 Q +0.72938, ( р 2 

=0.98911) (11) 

V = 8 km/h; when r = -0.4375 Q 2 +0.925 Q +0.70938; ( р 

2 =0.98911) (12) 

c ) according to the specific resistance of the coil to the 

pull (N/m): 

V = 6 km/h, R = -175 Q 2 +4015 Q +78.95, ( р 2 =0.9969) 

(13) 

R =-100 Q 2 +308 Q +71.1 when V =8 km/h . ( r 2 =0.9635) 

(14) 

Based on the experimental researches, we can 

conclude that the compaction quality and density of 

the soil meet the agrotechnical requirements, and to 

ensure that the relative resistance of the gear-plate 

roller is minimal, the vertical pressure force applied to 

it should be in the range of 700-900 N/m. 

According to the technical and economic calculations, 

the use of a row tillage machine on plowed lands 

equipped with a toothed plate roller reduces labor 

costs by 34.4% and costs per hectare of cultivated area 

by 38% [8; 9] 

REFERENCES  

1. Mamarasulova MT, Mamadaliyev MK, 

Abdirkhmonov RA Theory and experimental 

results of surveys to determine the diameter of 

teeth plank //International Journal of Mechanical 

Engineering. – 2022. – T. 7. – No. 3. – S. 578-581. 

2. Mamarasulova MT Determination of the optimal 

values of the parameters of the roller funnel of the 

machine for continuous monitoring of arable land 

//NamMTI scientific-technical journal. - 2020. - No. 

3. - S. 129-134. 

3. Tukhtakuziev A, Imomkulov Q, Mamarasulova M. 

Research of Angular Fluctuations of the Skating 

Rink of the Car For Proc essing the Plowed Fields // 

International Journal of Advanced Research in 

Science, Engineering and Technology. – India , Vol. 

6 Issue 4, April 2019 - ISSN: 2350-0328. 



Volume 04 Issue 10-2024 27 

                  

 
 

   
  
 

American Journal Of Agriculture And Horticulture Innovations  
(ISSN – 2771-2559) 
VOLUME 04 ISSUE 10    Pages: 21-27 

OCLC – 1290679216   

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Publisher: Oscar Publishing Services 

Servi 

4.   Mamarasulova, M., & Boltaboev, B. (2024). 

Comparative evaluation conducted on the 

selection of the type of roller shredder for the 

cultivation of plowed land. In E3S Web of 

Conferences (Vol. 497, p. 03023). EDP 

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ШУДГОРЛАНГАН ЕРЛАРГА ИЗМА-ИЗ ИШЛОВ 

БЕРАДИГАН МАШИНА ҒАЛТАКМОЛАСИГА 

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