Management of agropastoral systems in a semiarid region:
Gespeichert in:
| 1. Verfasser: | |
|---|---|
| Format: | Buch |
| Sprache: | English |
| Veröffentlicht: |
Wageningen
Pudoc
1990
|
| Schriftenreihe: | Simulation monographs
31 |
| Schlagworte: | |
| Online-Zugang: | Inhaltsverzeichnis |
| Beschreibung: | Zugl.: Jerusalem, Univ., Diss., 1984 |
| Beschreibung: | IX, 221 S. graph. Darst. |
| ISBN: | 9022009467 |
Internformat
MARC
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| 100 | 1 | |a Ungar, E. D. |e Verfasser |4 aut | |
| 245 | 1 | 0 | |a Management of agropastoral systems in a semiarid region |c E. D. Ungar |
| 264 | 1 | |a Wageningen |b Pudoc |c 1990 | |
| 300 | |a IX, 221 S. |b graph. Darst. | ||
| 336 | |b txt |2 rdacontent | ||
| 337 | |b n |2 rdamedia | ||
| 338 | |b nc |2 rdacarrier | ||
| 490 | 1 | |a Simulation monographs |v 31 | |
| 500 | |a Zugl.: Jerusalem, Univ., Diss., 1984 | ||
| 650 | 4 | |a Agriculture des régions arides - Israël - Néguev, Région de - Simulation par ordinateur | |
| 650 | 4 | |a Moutons - Élevage - Israël - Néguev, Région de - Simulation par ordinateur | |
| 650 | 4 | |a Systèmes agropastoraux - Israël - Néguev, Région de - Simulation par ordinateur | |
| 650 | 4 | |a Systèmes agropastoraux - Simulation par ordinateur | |
| 650 | 4 | |a Agricultural systems |x Computer simulation | |
| 650 | 4 | |a Agricultural systems |z Middle East |x Computer simulation | |
| 650 | 4 | |a Agropastoral systems |x Computer simulation | |
| 650 | 4 | |a Arid regions agriculture |z Middle East |x Computer simulation | |
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| 650 | 0 | 7 | |a Feldgraswirtschaft |0 (DE-588)4153919-9 |2 gnd |9 rswk-swf |
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Datensatz im Suchindex
| _version_ | 1804118447236317184 |
|---|---|
| adam_text | Titel: Management of agropastoral systems in a semiarid region
Autor: Ungar, E. D.
Jahr: 1990
Contents
Preface
1 Introduction
2 Theoretical framework
2.1 Classifying management decisions
2.2 Strategy and tactic in farm management
2.2.1 Case 1
2.2.2 Case 2
2.2.3 Case 3
2.3 Definition and application
2.4 Case 4: imperfect knowledge
2.5 Possible-outcome analysis
3 Outline of the agropastoral model
3.1 System
3.2 The management decisions
3.3 Structure of the model
3.4 Programming considerations
3.4.1 Time-step
3.4.2 Initialization
3.4.3 Meteorological data
3.4.4 Output
3.4.5 Programming conventions and COMMON blocks
4 Strategic management decisions
4.1 Land allocation
4.2 Stocking rate
4.3 Breed
4.4 Breeding
4.5 Sowing density
4.6 Fertilizer
4.7 Standard values of parameters
IX
1
3
3
3
3
4
4
5
5
7
9
9
10
10
11
11
12
12
12
13
15
15
17
17
19
21
22
22
5 Tactical management decisions 23
5.1 Supplementary feeding of the ewe 23
5.1.1 Introduction 23
5.1.2 Target-oriented feeding 23
5.1.3 Programming considerations 24
5.2 Grazing schedule of the ewe 24
5.2.1 Approach 24
5.2.2 Programming considerations 27
5.3 Grazing deferment ^
5.3.1 Introduction 27
5.3.2 Objective function 27
5.3.3 Green-season dynamics 28
5.3.4 Dry-season dynamics 29
5.3.5 Behaviour of the model 29
5.3.6 Programming considerations 36
5.4 Early-season grazing of green wheat 36
5.4.1 Introduction 36
5.4.2 Objective function 37
5.4.3 Behaviour of the model 37
5.4.4 Programming considerations 39
5.5 Late-season grazing of green wheat 40
5.5.1 Introduction 40
5.5.2 Calculating the expected yield of grain 40
5.5.3 Choosing between grazing and grain 42
5.5.4 Programming considerations 43
Calculating the expected yield of grain 43
Choosing between grazing and grain 43
5.6 Lamb feeding 45
5.6.1 Introduction 45
5.6.2 Model formulation 45
5.6.3 Behaviour of the model 47
5.6.4 Programming considerations 51
5.7 Lamb rearing 51
5.7.1 Approach 51
5.7.2 Programming considerations 54
5.8 Baling of straw 58
5.8.1 Introduction 58
5.8.2 Algorithm for the decision 58
5.8.3 Programming considerations 59
5.9 Cutting of wheat for hay 61
5.9.1 Introduction 61
5.9.2 Algorithm for the decision 61
5.9.3 Programming considerations 63
6 Biological and financial framework of simulation 65
6.1 Primary production 65
6.1.1 Use of ARID CROP 65
6.1.2 Programming considerations 68
6.2 Animal nutrition and production 68
vi
6.2.1 Efficiency of utilization of metabolic energy 77
6.2.2 Energy requirements for maintenance 78
Fasting heat production 78
Energy allowance for grazing activity 78
6.2.3 Requirements for production and performance 79
Heat of combustion of gain in liveweight 79
Liveweight change 80
Pregnancy 80
Lactation 81
Total energy requirements of the ewe 85
6.2.4 Programming considerations 87
6.3 Intake 90
6.3.1 Approach 90
6.3.2 Programming considerations 94
6.4 Flock dynamics 97
6.5 Financial balance 97
7 Validation 99
8 Results of the agropastoral model 101
8.1 Standard run 101
8.2 Early-season grazing of green wheat 105
8.3 Late-season utilization of green wheat by grazing 106
8.4 Late-season utilization of green wheat for hay 107
8.5 Utilization of wheat aftermath by grazing and baling of straw 107
8.6 Lamb rearing 109
8.6.1 Main rearing patterns in the standard run 109
8.6.2 Effect of a fixed weaning age 113
8.6.3 Inclusion of sown legume for lamb grazing 114
8.7 Prices and price ratios 119
8.8 Stocking rate 119
9 Summary 125
Concluding remarks 127
10 References 129
11 Listing of model 133
12 Model directory 179
12.1 Local variables 179
12.2 Acronyms, definitions and units of measure 179
13 Index 211
vii
|
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| discipline | Agrarwissenschaft Agrar-/Forst-/Ernährungs-/Haushaltswissenschaft / Gartenbau |
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| id | DE-604.BV004250975 |
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| indexdate | 2024-07-09T16:10:26Z |
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| isbn | 9022009467 |
| language | English |
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| spelling | Ungar, E. D. Verfasser aut Management of agropastoral systems in a semiarid region E. D. Ungar Wageningen Pudoc 1990 IX, 221 S. graph. Darst. txt rdacontent n rdamedia nc rdacarrier Simulation monographs 31 Zugl.: Jerusalem, Univ., Diss., 1984 Agriculture des régions arides - Israël - Néguev, Région de - Simulation par ordinateur Moutons - Élevage - Israël - Néguev, Région de - Simulation par ordinateur Systèmes agropastoraux - Israël - Néguev, Région de - Simulation par ordinateur Systèmes agropastoraux - Simulation par ordinateur Agricultural systems Computer simulation Agricultural systems Middle East Computer simulation Agropastoral systems Computer simulation Arid regions agriculture Middle East Computer simulation Semiarides Gebiet (DE-588)4137761-8 gnd rswk-swf Feldgraswirtschaft (DE-588)4153919-9 gnd rswk-swf Management (DE-588)4037278-9 gnd rswk-swf Naher Osten (DE-588)4113937-9 Hochschulschrift gnd-content Semiarides Gebiet (DE-588)4137761-8 s Feldgraswirtschaft (DE-588)4153919-9 s Management (DE-588)4037278-9 s DE-604 Simulation monographs 31 (DE-604)BV003607159 31 HBZ Datenaustausch application/pdf http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=002644442&sequence=000002&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA Inhaltsverzeichnis |
| spellingShingle | Ungar, E. D. Management of agropastoral systems in a semiarid region Simulation monographs Agriculture des régions arides - Israël - Néguev, Région de - Simulation par ordinateur Moutons - Élevage - Israël - Néguev, Région de - Simulation par ordinateur Systèmes agropastoraux - Israël - Néguev, Région de - Simulation par ordinateur Systèmes agropastoraux - Simulation par ordinateur Agricultural systems Computer simulation Agricultural systems Middle East Computer simulation Agropastoral systems Computer simulation Arid regions agriculture Middle East Computer simulation Semiarides Gebiet (DE-588)4137761-8 gnd Feldgraswirtschaft (DE-588)4153919-9 gnd Management (DE-588)4037278-9 gnd |
| subject_GND | (DE-588)4137761-8 (DE-588)4153919-9 (DE-588)4037278-9 (DE-588)4113937-9 |
| title | Management of agropastoral systems in a semiarid region |
| title_auth | Management of agropastoral systems in a semiarid region |
| title_exact_search | Management of agropastoral systems in a semiarid region |
| title_full | Management of agropastoral systems in a semiarid region E. D. Ungar |
| title_fullStr | Management of agropastoral systems in a semiarid region E. D. Ungar |
| title_full_unstemmed | Management of agropastoral systems in a semiarid region E. D. Ungar |
| title_short | Management of agropastoral systems in a semiarid region |
| title_sort | management of agropastoral systems in a semiarid region |
| topic | Agriculture des régions arides - Israël - Néguev, Région de - Simulation par ordinateur Moutons - Élevage - Israël - Néguev, Région de - Simulation par ordinateur Systèmes agropastoraux - Israël - Néguev, Région de - Simulation par ordinateur Systèmes agropastoraux - Simulation par ordinateur Agricultural systems Computer simulation Agricultural systems Middle East Computer simulation Agropastoral systems Computer simulation Arid regions agriculture Middle East Computer simulation Semiarides Gebiet (DE-588)4137761-8 gnd Feldgraswirtschaft (DE-588)4153919-9 gnd Management (DE-588)4037278-9 gnd |
| topic_facet | Agriculture des régions arides - Israël - Néguev, Région de - Simulation par ordinateur Moutons - Élevage - Israël - Néguev, Région de - Simulation par ordinateur Systèmes agropastoraux - Israël - Néguev, Région de - Simulation par ordinateur Systèmes agropastoraux - Simulation par ordinateur Agricultural systems Computer simulation Agricultural systems Middle East Computer simulation Agropastoral systems Computer simulation Arid regions agriculture Middle East Computer simulation Semiarides Gebiet Feldgraswirtschaft Management Naher Osten Hochschulschrift |
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