Effect of straw length and rotavator kinematic parameter on soil and straw movement by a rotary blade

Fang, Huiying; QingYi, Zhang; Chandio, Farman Ali; Guo, Jun; Sattar, Asma; Arslan, Chaudhry; Changying, Ji

doi:10.1016/j.eaef.2016.01.001

Cited by 26 publications

(31 citation statements)

References 6 publications

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“…Referring to GB/T5669-2008 "Rotary Tiller-Rotary Blades and Blade Holders" [26] , the long rotary tillage blades (Type IIT245) [27] designed for heavy residue and hard soils, its rotating radius R 1 is 245 mm and its operation width b 1 is 50 mm. The short tillage blade (Type IT225) [27] designed for loose and soft soil, has a rotating radius R 2 is 225 mm. In order to increase soil throw, the width of short rotary tillage blade was 60 mm.…”

Section: Vibration Reduction Design Of Rotary Tiller Blade Rotor 31mentioning

confidence: 99%

Design and experiment of anti-vibrating and anti-wrapping rotary components for subsoiler cum rotary tiller

Zheng

McHugh

et al. 2019

International Journal of Agricultural and Biological Engineering

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The commonly used subsoiling cum rotary tiller machine (SRT) in Northern China is a combination of subsoiler and horizontal rotary tiller, however backfilling of the subsoiling slot, excessive vibration and plant residue wrapping on rotary components has been rarely considered. Therefore, the rotary components and assembly were redesigned to address these issues and to an SRT fitted with IT225 short curve rotary blades behind the V-shape subsoiling slots and IIT245 long curve rotary blades between the tines. Long and short blades were fitted on a rotor in a double helix, with optimal spiral angles of 65º and 90º, and phase angle of 147º and 180º, respectively. Compared with the commonly used SRT (CSRT), the additional anti-wrapping cutting blades in the circumferential and axial direction of ASRT could remove hanging residue on the blade holders, wrapping on the rotor and formation of an isolation layer. Moreover, the cutting edge curve of anti-wrapping cutting blades was an exponential curve. Field tests demonstrated that the redesigned SRT with anti-vibrating and anti-wrapping rotary components (ASRT) had was a significant advancement over the CSRT. Moreover, the working depth of rotary tillage was more stable, while other observations confirmed that backfilling of the subsoiling slot was also improved.

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Section: Vibration Reduction Design Of Rotary Tiller Blade Rotor 31mentioning

confidence: 99%

Design and experiment of anti-vibrating and anti-wrapping rotary components for subsoiler cum rotary tiller

Zheng

McHugh

et al. 2019

International Journal of Agricultural and Biological Engineering

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“…A large amount of residue mulching on the ground will make sowing operation di cult and lead to slower residue decomposition. Therefore, a common way is to cut the residue into a proper length and then incorporate the residue uniformly into the soil by tillage operation 19 . That is, some crop residue must be incorporated into the soil [20][21] .…”

Section: Introductionmentioning

confidence: 99%

Field Investigation of Straw Length, Stubble Height and Rotary Speed Effect on the Dispersion and Burying of Residue

Xie

et al. 2021

Preprint

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High-yielding agriculture leads to plenty of residues left in the field after harvest, which not only makes seeding operations difficult, but also decreases residue decomposition rate. Thus, it is necessary to incorporate some residue into the soil by tillage operations. Providing the relation between tillage operations and residue incorporation, and establishing a mathematical model plays an important role in residue management and the design of tillage machinery. In order to obtain detailed data on the interaction between crop residue and tillage operations, an electric and multi-functional field testing bench with precise parameter control was developed to perform residue incorporation characteristics of rotary tillage, and investigated straw length, rotary speed and stubble height effect on the dispersion and burying of residue. Three experimental factors affecting residue incorporation performance were studied, i.e. six lengths of straw (30-150 mm), four heights of stubble (50-200 mm), and three rotary speeds (240-320 rpm). Chopped straw and stubble with certain sizes were prepared for the test, and measure the dispersion uniformity and burying rate of residue after rotary tillage. The results indicated that straw length, stubble height, and rotary speed all impact residue incorporation quality. The dispersion uniformity and burying rate of residue decreased with the increase of straw length and stubble height; Lower rotary speed parameter buried lesser residue and dispersed worse uniformity than higher one; It is suggested that farmers determine the straw length and stubble height at the stage of harvest according to the burying rate and dispersion uniformity of residue.

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“…In a simulated burying test, the temperature and moisture content of the straw can be accurately controlled [10], while a field test can effectively explain the changes in the moisture and nutrient contents of straw returned to the field [11]. Rotary tillage could fully mix straw and soil, and reduce soil damage compared with other types of tillage [12]. The changes to the structure and physicochemical properties of straw returned to the field are mainly determined by the straw itself [13].…”

Section: Introductionmentioning

confidence: 99%

“…For example, the compressive properties of tomatoes or grapes can provide a theoretical basis for fruit harvesting and transport machinery design [19]. The mechanical properties of cotton and sugarcane stalks during harvesting affect the blade design and cutting process of harvesting machinery [12]. The straw of different lengths affects the movement of the straw and soil mixture and the operation of a rotary tiller [12].…”

Section: Introductionmentioning

confidence: 99%

“…The mechanical properties of cotton and sugarcane stalks during harvesting affect the blade design and cutting process of harvesting machinery [12]. The straw of different lengths affects the movement of the straw and soil mixture and the operation of a rotary tiller [12]. Straw can be compacted with soil to stabilize soil structure, and plant stubble and residual roots can solidify soil [20].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Study of the Mechanics and Micro-Structure of Wheat Straw Returned to Soil in Relation to Different Tillage Methods

et al. 2020

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A field experiment was conducted to study the effects of different tillage methods, and their interaction on the dynamic changes of straw decomposition rate, mechanical properties, and micro-structure of the stalk. A nylon mesh bag technique was used. An obvious change was observed in the decomposition rate of straw, and its mechanical, and micro-structural properties. The decomposition rate of straw was increased in all tillage treatments. Specifically, it increased consistently in conventional and dry rotary tillage, and sharply in wet rotary tillage. Furthermore, for all tillage, the mechanical properties like shear and bending strengths decreased sharply while compressive strength first decreased linearly and then increased, whereas the micro-structure of wheat straw showed a fluctuating trend, i.e., it changed neither regularly nor consistently over time. Moreover, the micro-structure of the stalk explained the morphological changes to the straw that returned to the field, which may impact the mechanical properties. However, these changes could not explain the degradation trend of straw directly. The findings of the study could be used as a theoretical reference for the design of tillage and harvesting machinery keeping in view soil solidification and compaction dynamics.

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Effect of straw length and rotavator kinematic parameter on soil and straw movement by a rotary blade

Cited by 26 publications

References 6 publications

Design and experiment of anti-vibrating and anti-wrapping rotary components for subsoiler cum rotary tiller

Design and experiment of anti-vibrating and anti-wrapping rotary components for subsoiler cum rotary tiller

Field Investigation of Straw Length, Stubble Height and Rotary Speed Effect on the Dispersion and Burying of Residue

Study of the Mechanics and Micro-Structure of Wheat Straw Returned to Soil in Relation to Different Tillage Methods

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