Agricultural Systems

Papers Published in 1989

C O N T E N T S O F V O L U M E 29

Number 1

Editorial

Modeling Prawn Production Management System: A Dynamic Markov Decision Approach

PINGSUN LEUNG & YUNG C. SHANG (USA)

Simulation of DNA, Protein and Fat Accretion in Growing Steers O. N. DI MARCO (Argentina), R. L. BALDWIN & C. C. CALVERT (USA)

Evaluation of A New Technology When Applied to Sheep Production Systems: Part I - -Model Description .

P. J. BOWMAN, D. A. WYSEL, D. G. FOWLER & D. H. WHITE (Australia)

An Integrated Expert Decision Support System for Agricultural Management . R. E. PLANT (USA)

Optimal Greenhouse Production under Economic Constraints IDO SEGINER (Israel)

Simulating the Effects of Bioengineered Non-Ice Nucleating Bacteria on Potato Yields ,

D. A. ANDOW, P. S. TENG, K. B. JOHNSON & S. S. SNAPP (USAI

Book Reviews

21

35

49

67

81

93

Number 2

The Use and Productivity of Labour in Shifting Cultivation: An East Malaysian Case Study .

R. A. CRAMB (Australia)

An Impact and Performance Evaluation of Smallholder Participation in Tree Planting, Nigeria .

G. J. OSEMEOBO (Nigeria)

97

117

Agricultural Systems--1989

A Phenomenological Model of Coastal Bermudagrass Production A. R. OVERMAN, E. A. ANGLEY & S. R. WILKINSON (USA)

Lwestock Productivity Assessment and Herd Growth Models MARTIN UPTON (UK)

Winter Fattening of Beef Cattle: From Research Station Trials to Implementation by Farmers .

T. FARRINGTON, D. K. V. MARSH & L. MAYER (Botswana)

Progressive Validation of Queensland Horticultural Crop Forecasts . D. G. MAYER, D. SCHOORL & J. E. HOLT (Australia)

Book Rewews

137

149

165

179

189

Number 3

Cyclical Behavlour in The South African Meat Industry: Analysis and Control. P. W. UYS (Republic of South Africa)

Soyabean Productton in the Tropics A Simulation Case for Mexico. R. PATRON SARTI & J. G. W. JONES (UK)

Biophys,cal Simulation for Evaluating New Crops: The Case of Switchgrass for Biomass Energy Feedstock

J. LOWENBERG-DeBOER & J. H. CHERNEY (USA)

Implementation and Evaluation of a Steer Growth Model . O. N. DI MARCO (Argentinaj & R. L. BALDWIN (USA)

A Generic Planning Model for Use m the Livestock Feed Sector of Developing Countries

M. R. JONES (UK)

193

219

233

247

267

Number 4

Evaluation of a New Technology When Apphed to Sheep Production Systems: Part II--Real-time Ultrasonic Scanning of Ewes in Mid-pregnancy

P. J. BOWMAN, D. G. FOWLER, D. A. WYSEL & D. H. WHITE (Australia)

Goat and Sheep Population Changes on a Masai Group Ranch in South-Western Kenya, 1978-1986

R. TREVOR WILSON (Ethiopia) & MICHAEL OLE MAKI (Kenya)

Analysis of the Use of Energy m Agriculture Approaches and Problems M. R. JONES (UK)

287

325

339

Agricultural Systems--1989

An Application of the Markov Chain Approach to Forecasting Cotton Yields from Surveys

J. H. MATIS, T. BIRKETT & D. BOUDREAUX (USA)

Cattle Dynamics and Their Implications in Pabna District, Bangladesh C. HERMANS, H. M. J. UDO (The Netherlands) & F. DAWOOD (Bangladesh)

Book Review

C O N T E N T S OF V O L U M E 30

Number 1

Climate Indices for Application in Empirical Crop Production Studies JAMES W. MJELDE & STEVEN E. HOLLINGER (USA)

A Model Simulating the Production of Dual Purpose Replacement Heifers JAN TIND S~RENSEN (Denmark)

Partitioning of Dry Matter Between Leaf and Stem in Coastal Bermudagrass A. R. OVERMAN & S. R. WILKINSON (USA)

Potential and Water-limited Wheat Yields in Rice Based Cropping Systems in Southeast Asia

P. K. AGGARWAL & F. W. T. PENNING DE VRIES (The Philippines)

Modeling Within-Plant Distribution of Heliothis spp. (Lepidoptera: Noctuidae) Damage in Cotton

WILLIAM M. THOMAS (USA)

Agricultural Drought Impact Evaluation Model: A Systems Approach S. N. KULSHRESHTHA & K. K. KLEIN (Canada)

Book Reviews

357

371

385

15

35

49

71

81

97

Number 2

Corriedale Sheep Production when Supplemented with Ryegrass Pasture in Southern Peru

H. D. BLACKBURN, F. C. BRYANT, T. C. CARTWRIGHT & U C. FIERRO (USA)

Agricultural Drought Impact Evaluation Model: Description of Components K. K. KLEIN, S. N. KULSHRESHTHA & S. A. KLEIN (Canada)

Agricultural Research and Cereal Technology Introduction in Burkina Faso and Niger

JOHN H. SANDERS (USA)

101

117

139

Agricultural Systems--1989

Putting Ideas into Practice .

J. E. HOLT & D. SCHOORL (Australia)

Profitability Assessment of Animal Traction Investment: The Case of Northern Ghana .

ANTHONY PANIN (Ethiopia)

Experimental Systems of Integrated and Organic Wheat Production .

P. VEREIJKEN [The Netherlands)

Book Reviews

155

173

187

199

Number 3

Economic Impacts of Small-Scale Imgation under Drought Conditions m Northwestern Saskatchewan: An Application of the Agricultural Drought Impact Evaluation Model

K. K. KLEIN & S. N. KULSHRESHTHA (Canada)

Temporal Determinants of the Productivity of Rice-Wheat Cropping Systems J. C. FLINN (Philippines) & B. B. KHOKHAR (Pakistan)

Farm-level Analysis of Agricultural Insurance: A Mathematical Programming Approach

MICHAEL S. KAYLEN, EDNA T. LOEHMAN & PAUL V. PRECKEL (USA)

Comparative Study of Energy Flow through Village Ecosystems of Two Co- existing Communities (the Khasis and the Nepalis) of Meghalaya in North-East India

SUPRAVA PATNAIK & P. S. R A M A K R I S H N A N (Indial

SOYBUG: An Expert System for Soybean Insect Pest Management . HOWARD W. BECK, PIERCE JONES & J. W. JONES (USA)

Effect of Clipping Height and Interval on Coastal Bermudagrass Production A. R. OVERMAN & S. R. WILKINSON (USA)

Book Review

205

217

235

245

269

287

299

Number 4

A Simulation Approach for Evaluating Field Data from Grazing Trials JOHN W. WALKER, JERRY W. STUTH & RODNEY K. HEITSCHMIDT (USA)

Application of a Simulation Software to the Analysis of a Peasant Farming System J. A. BERDEGUE (Chile), M. INSTALLE, Ch. DUQUE (Belgium), R. GARCIA & X. QUEZADA (Chile)

301

317

Agricultural Systems--1989

Multiple Goal Feasibility of Forage Shrub Plantations in a Semi-arid Mediterranean-Type Agropastoral System .

N. G. SELIGMAN, R. W. BENJAMIN & I. SPHARIM (Israel)

A Case Study in the Use of Soft Systems Methodology: Restructuring an Academic Organisation to Facilitate the Education of Systems Agriculturalists .

ROBERT D. MACADAM & ROGER G. PACKHAM (Australia)

Impact of Agronomic and Economic Factors on Farm Profitability . B. R. HANSEN & M. A, KRAUSE (Australia)

335

351

369

C O N T E N T S O F V O L U M E 31

Number 1

Editorial

Special Issue on Expert Systems: Applications in Agriculture

Agricultural Applications of Expert Systems Concepts PIERCE JONES (USA)

FinARS: A Financial Analysis Review Expert System. W. G. BOGGESS, P. J. VAN BLOKLAND & S. D. MOSS (USA)

A Decision Model for Nutrition Management m Controlled Environment Agriculture .

R. PETER FYNN, W. L. ROLLER & H. M. KEENER (USA)

Application of the GOSSYM/COMAX System to Cotton Crop Management J. M. McKINION, D. N. BAKER, F. D. WHISLER & J. R. LAMBERT (USA)

Evaluation of SMARTSOV: An Expert Simulation System for Insect Pest Management

W. D. BATCHELOR, R. W. McCLENDON, D. B. ADAMS & J. W. JONES (USA)

Dairy Herd Nutritional Analysis Using Knowledge Systems Techniques A. DALE WHITTAKER, MICHAEL A. TOMASZEWSKI, JEREMY F. TAYLOR, ROBERT FOURDRA IN E (USA), CORNELIUS J. VAN OVERVELD & RUDY G. SCHEPERS (The Netherlands)

SELECT: An Expert System Shell for Selecting Amongst Decision or Management Alternatives .

O. W. MORGAN, M. J. McGREGOR, M. RICHARDS & K. E. OSKOUI (UK)

19

35

55

67

83

97

Agricultural Systems--1989

An Expert Database System for Ornamental Plants HOWARD BECK, PIERCE JONES, DENNIS WATSON & FEDRO ZAZUETA (USA)

An Artificial Intelligence Based Method for Scheduling Crop Management Actions RICHARD E. PLANT (USA)

111

127

Number 2

A Systems Approach to Improving Subsistence Yam Production in Central Province, Papua New Guinea

G. A. KING (Papua New Guinea)

International Science and the Research Needs of Agriculturally Dependant Communities in Southern Africa.

MALCOLM J. BLACKIE (Malawi)

Pastoralist Strategies for Survival in Unpredictable Environments: A Model of Herd Composition that Maximises Household Viability

RUTH MACE & ALASDAIR HOUSTON (UK)

Interactive Effects of Grazing System Variables on Stmulated Cattle Production and Stocking Rate of Bermudagrass (Cynodon dactylon)

R. L. SENFT & L. M. THAREL (USA)

Patterns of Water Availability for Sunflower Crops in Semi-Arid Central Argentina. A Simulation-Based Evaluation of Their Interactions with Cropping Strategies and Cultivar Traits

V. O. SADRAS & A. J. HALL (Argentina)

157

169

185

205

221

Number 3

Data Aggregation and Farm Risk Analysis. SIEGFRIED DEBRAH (Mali) & HARRY H. HALL (USA)

A Simulation Model of Bull Beef Production under Rotational Grazing m the Waikato Region of New Zealand.

C. J. DOYLE (UK), J. A. BAARS & A. C. BYWATER (New Zealand)

Diversification, Productivity and Stability of Agroecosystems in the Semi-arid Pampas of Argentina

E. F. VIGLIZZO & Z. E. ROBERTO (Argentina)

Rice Production in the Rainforest in Zaire: An Analysis of The Smallholder Traditional Farming System in Yalibwa, Upper-Zaire.

E. HUYBENS & E. F. TOLLENS (Belgium)

239

247

279

291

Agricultural Systems--1989

Economic Evaluation of Improved Management for Zebu Cattle in Northern Tanzania

PETER K. NGATEGIZE (Ethiopia)

Book Reviews

305

315

Number 4

Modelling the 'Economic Consequences of Potential Management Changes in a Mature Kiwifruit Orchard in New Zealand.

C. J. DOYLE (UK), W. B. MOORE & R. F. HENZELL (New Zealand)

An Analytical Model of a Wheat Breeding Program , JOHN P. BRENNAN [Australia)

A Management Model that Helps Increase Profit on Western Australian Dairy Farms .

G. R. OLNEY & G. J. KIRK (Australia)

Plant Nutrient Management Strategy Implications for Optimal Herd Size and Performance of a Simulated Dairy Farm

P. J. WESTPHAL, L. E. LANYON & E. J. PARTENHEIMER (USA)

321

349

367

381

Book Reviews 395