Soil cutting and tillage:
Gespeichert in:
| 1. Verfasser: | |
|---|---|
| Format: | Buch |
| Sprache: | English |
| Veröffentlicht: |
Amsterdam u. a.
Elsevier
1985
|
| Schriftenreihe: | Developments in agricultural engineering.
7. |
| Schlagworte: | |
| Online-Zugang: | Inhaltsverzeichnis |
| Beschreibung: | VII, 217 S. Ill., graph. Darst. |
| ISBN: | 0444425489 |
Internformat
MARC
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| 100 | 1 | |a MacKyes, Edward |e Verfasser |4 aut | |
| 245 | 1 | 0 | |a Soil cutting and tillage |c Edward McKyes |
| 264 | 1 | |a Amsterdam u. a. |b Elsevier |c 1985 | |
| 300 | |a VII, 217 S. |b Ill., graph. Darst. | ||
| 336 | |b txt |2 rdacontent | ||
| 337 | |b n |2 rdamedia | ||
| 338 | |b nc |2 rdacarrier | ||
| 490 | 1 | |a Developments in agricultural engineering. |v 7. | |
| 650 | 4 | |a Sols - Préparation | |
| 650 | 4 | |a Tillage | |
| 650 | 0 | 7 | |a Pflügen |0 (DE-588)4178787-0 |2 gnd |9 rswk-swf |
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| 830 | 0 | |a Developments in agricultural engineering. |v 7. |w (DE-604)BV001897004 |9 7. | |
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| 999 | |a oai:aleph.bib-bvb.de:BVB01-001478078 | ||
Datensatz im Suchindex
| _version_ | 1804116705439383552 |
|---|---|
| adam_text | CONTENTS
1. INTRODUCTION TO TILLAGE AND EARTHMOVING
1.1 HISTORY OF TILLAGE.................. 1
1.2 MAIN TYPES OF TILLAGE TOOLS
1.2.1 Primary tillage................... 3
1.2.2 Secondary tillage tools................ 6
1.3 EARTHMOVING EQUIPMENT................ 8
1.4 THE ANALYSIS OF SOIL CUTTING AND TILLAGE..... 9
2. SOIL MECHANICS
2.1 COULOMB S LAW OF FRICTION AND COHESION...... 11
2.2 THE METHOD OF STRESS CHARACTERISTICS....... 16
2.3 BOUNDARY CONDITIONS................. 20
2.4 MEASUREMENT OF SOIL STRENGTH PROPERTIES..... 21
2.4.1 The direct shear box................. 22
2.4.2 The triaxial test................... 23
2.4.3 Field tests...................... 27
2.5 SOIL BEHAVIOUR CONSIDERATIONS
2.5.1 Soil water pressure and movement........... 29
2.5.2 Critical state soil mechanics.............. 32
2.5.3 Soil stress-strain behaviour............... 33
2.5.4 Shear rate effects.................. 34
2.6 PROBLEMS........................ 35
3. SOIL CUTTING FORCES
3.1 THE UNIVERSAL EARTHMOVING EQUATION........ 38
3.2 TWO DIMENSIONAL CASES: METHOD OF STRESS
CHARACTERISTICS
3.2.1 Smooth, vertical blade................. 38
3.2.2 Smooth raked blade in a cohesive soil......... 40
3.2.3 Rough raked blade in a cohesive soil.......... 42
3.2.4 Boundary conditions between very rough and smooth • • • 44
3.2.5 Unconstrained tool to soil adhesion........... 46
3.2.6 The shape of failure surfaces............. 47
3.2.7 Including soil weight - Hettiaratchi s calculations .... 47
3.2.8 Approximation for soil with weight........... 49
3.2.9 Validity of the weightless soil assumption........ 51
3.3 THE METHOD OF TRIAL WEDGES............. 51
3.4 SIMILITUDE METHODS................... 54
3.5 THREE DIMENSIONAL CASES............... 55
3.5.1 Hettiaratchi and Reece (1967)............. 55
3.5.2 Godwin and Spoor (1977) ............... 56
3.5.3 Three dimensional wedges (McKyes and Ali, 1977) .... 59
3.5.4 Grisso et al. (1980).................. 64
3.5.5 Comparison of the methods.............. 66
VI
3.6 DYNAMIC EFFECTS....................71
3.6.1 Inertial forces .................... 72
3.6.2 Changes in soil strength................ 73
3.7 CRITICAL DEPTH..................... 75
3.8 COMPLEX TOOL SHAPES
3.8.1 Curved tools ..................... 79
3.8.2 Shank and foot tools.................. 80
3.8.3 The moldboard plow.................. 81
3.8.4 Other tools...................... 83
3.9 PROBLEMS........................ 84
4. SOIL LOOSENING AND MANIPULATION
4.1 MEASUREMENTS OF SOIL LOOSENING........... 87
4.2 EFFICIENCY OF SOIL LOOSENING
4.2.1 Draft force efficiency................. 92
4.2.2 Loosening and pulverization efficiencies......... 95
4.3 SOIL MIXING AND INVERSION............... 98
4.3.1 Soil properties .................... 99
4.3.2 Tool shape and speed ................. 100
4.4 TOOL SPACING
4.4.1 Spacing and volume of soil disturbed.......... 101
4.4.2 Tandem tool configurations............... 103
5. SOIL PROPERTIES AND PLANT GROWTH
5.1 SOIL COMPACTION .................... 105
5.2 MECHANICAL AND HYDRAULIC PROPERTIES OF
COMPACTED SOIL
5.2.1 Mechanical properties................. 112
5.2.2 Hydraulic properties.................. 114
5.3 SOIL PHYSICAL PROPERTIES AND PLANT GROWTH..... 115
5.4 TILLAGE OF COMPACTED SOIL............... 123
5.5 PROBLEMS........................ 124
6. TRACTION MACHINES
6.1 FORCE AND ENERGY BALANCES
6.1.1 Forces on a traction machine.............. 125
6.1.2 Energy balance at the machine-soil interface....... 127
6.2 TRACTION, SOIL DEFORMATION AND SLIP
6.2.1 Maximum traction force................ 129
6.2.2 Soil deformation and slip................ 131
6.2.3 Estimation of contact areas............... 134
6.3 SINKAGE AND ROLLING RESISTANCE
6.3.1 Sinkage in soil..................... 135
6.3.2 Rolling resistance................... 140
6.3.3 Bekker s formulae................... 146
6.3.4 McKyes (1978) .................... 147
6.4 MACHINE INTERNAL LOSSES................ 149
6.5 MATCHING MACHINES AND TOOLS............. 152
6.6 PROBLEMS ........................ 155
VII
REFERENCES.......................... 157
APPENDIX 1. Values of N factors, two dimensions......... 162
APPENDIX 2. Values of N factors, three dimensions........ 170
APPENDIX 3. Values of failure wedge angles............ 208
APPENDIX 4. Selected values of soil mechanical properties..... 212
AUTHOR INDEX......................... 214
SUBJECT INDEX......................... 216
|
| any_adam_object | 1 |
| author | MacKyes, Edward |
| author_facet | MacKyes, Edward |
| author_role | aut |
| author_sort | MacKyes, Edward |
| author_variant | e m em |
| building | Verbundindex |
| bvnumber | BV002249390 |
| callnumber-first | S - Agriculture |
| callnumber-label | S604 |
| callnumber-raw | S604 |
| callnumber-search | S604 |
| callnumber-sort | S 3604 |
| callnumber-subject | S - General Agriculture |
| classification_rvk | ZC 15500 |
| classification_tum | LAN 730f LAN 114f |
| ctrlnum | (OCoLC)12420424 (DE-599)BVBBV002249390 |
| dewey-full | 631.5/1 |
| dewey-hundreds | 600 - Technology (Applied sciences) |
| dewey-ones | 631 - Techniques, equipment & materials |
| dewey-raw | 631.5/1 |
| dewey-search | 631.5/1 |
| dewey-sort | 3631.5 11 |
| dewey-tens | 630 - Agriculture and related technologies |
| discipline | Agrarwissenschaft Agrar-/Forst-/Ernährungs-/Haushaltswissenschaft / Gartenbau Pflanzenbau |
| format | Book |
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| id | DE-604.BV002249390 |
| illustrated | Illustrated |
| indexdate | 2024-07-09T15:42:45Z |
| institution | BVB |
| isbn | 0444425489 |
| language | English |
| oai_aleph_id | oai:aleph.bib-bvb.de:BVB01-001478078 |
| oclc_num | 12420424 |
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| owner | DE-M49 DE-BY-TUM DE-703 DE-1028 DE-11 |
| owner_facet | DE-M49 DE-BY-TUM DE-703 DE-1028 DE-11 |
| physical | VII, 217 S. Ill., graph. Darst. |
| publishDate | 1985 |
| publishDateSearch | 1985 |
| publishDateSort | 1985 |
| publisher | Elsevier |
| record_format | marc |
| series | Developments in agricultural engineering. |
| series2 | Developments in agricultural engineering. |
| spelling | MacKyes, Edward Verfasser aut Soil cutting and tillage Edward McKyes Amsterdam u. a. Elsevier 1985 VII, 217 S. Ill., graph. Darst. txt rdacontent n rdamedia nc rdacarrier Developments in agricultural engineering. 7. Sols - Préparation Tillage Pflügen (DE-588)4178787-0 gnd rswk-swf Pflügen (DE-588)4178787-0 s DE-604 Developments in agricultural engineering. 7. (DE-604)BV001897004 7. HBZ Datenaustausch application/pdf http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=001478078&sequence=000002&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA Inhaltsverzeichnis |
| spellingShingle | MacKyes, Edward Soil cutting and tillage Developments in agricultural engineering. Sols - Préparation Tillage Pflügen (DE-588)4178787-0 gnd |
| subject_GND | (DE-588)4178787-0 |
| title | Soil cutting and tillage |
| title_auth | Soil cutting and tillage |
| title_exact_search | Soil cutting and tillage |
| title_full | Soil cutting and tillage Edward McKyes |
| title_fullStr | Soil cutting and tillage Edward McKyes |
| title_full_unstemmed | Soil cutting and tillage Edward McKyes |
| title_short | Soil cutting and tillage |
| title_sort | soil cutting and tillage |
| topic | Sols - Préparation Tillage Pflügen (DE-588)4178787-0 gnd |
| topic_facet | Sols - Préparation Tillage Pflügen |
| url | http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=001478078&sequence=000002&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA |
| volume_link | (DE-604)BV001897004 |
| work_keys_str_mv | AT mackyesedward soilcuttingandtillage |