Agricultural l.l'ater Management, 21 ( 1992 ) 335-336 335 © 1992 Elsevier Science Publishers B.V. All rights reserved. 0378-3774/92/$05.00

Contents Volume 21, 1992

Vol. 21 Nos. 1+2 J U N E 1992

Announcementjkom the Publisher ........................................................................................... v

Publisher's Note ...................................................................................................................... 1

International competition for water and motivations for dispute resolution J.E. Priest (Englewood, CO, USA) .................................................................................... 3

Simullation of tertiary unit efficiencies in large irrigation systems V.V.N. Murty, A.H. Azar, A. Sarwar and K. Sudsaisin (Bangkok, Thailand} .................. 13

Losses from low-pressure center-pivot irrigation systems in a desert climate as affected by nozzle height H . M . Abo-Ghobar (Riyadh, Saudi Arabia) ....................................................................... 23

Future of irrigation in balanced third world development M i . Albertson (Fort Collins, CO, USA) and H. Bouwer (Phoenix, AZ, USA) .............. 33

Productive capacity of trenching and trenchless machines when laying subsurface drains J.G.S. de Wilde (Wageningen, Netherlands) ..................................................................... 45

Sensitivity of agricultural drainage systems to changes in climatic inputs A.C. Armstrong, R. Arrowsmith and D.A. Castle (Cambridge, UK) ................................ 57

A simple flow resistance model for the management of drainage/sub-irrigation systems T. Brandyk (Warsaw, Poland), P.B. Leeds-Harrison (Bedford, U K) and K. Skapski ( Warsaw, Poland) .............................................................................................................. 67

Estimating agricultural benefits from drainage over a relatively level terrain J.R.C. Robinson, R.D. Lacewell, J.R. Stoll and Roger Freeman ( Karnal, India) ............. 79

Effect on high salinity and SAR waters on salinization, sodication and yields of pearl- millet and wheat R.B. Singb, P.S. Minhas, C.P.S. Chauhan and R.K. Gupta (Karnal, India) ..................... 93

Effect of salinity on water stress, growth and yield of broadbeans N. Katerji (Thiverval, France), J.W. van Hoorn (Wageningen, Netherlands), A. Hamdy, N. Bouzid, S. E1-Sayed Mahrous and M. Mastrorilli (Bari, Italy) .................. 107

A rainfall simulator study of infiltration into arable soils A. Wierda and A.W.L. Veen (Groningen, Netherlands ) ................................................... 119

Estimation of water uptake pattern of groundnut (Arachis hypogaea L. ) S. Sarkar and S. Kar (Kharagpur, India) ........................................................................... 137

Computing the waterbalance of a small agricultural catchment in southern England by consideration of different land-use types. I. Land classification using remotely-sensed imagery G. Roberts, M. France and M. Robinson (Wallingford, UK) ..............................................

Computing the water balance of a small agricultural catchment in southern England by consideration of different land-use types. II. Evaporation losses from different vegetation types G. Roberts and A.M. Roberts (Wallingfort, UK) .............................................................. 155

336 CONTENTS VOL. 21, 1992

Vol. 21 No. 3 AUGUST 1992

Research Papers Effects of recession criteria on prediction of recession times in border irrigation models

B.L. Maheshwari (Parkville, Australia ) ............................................................................. 167 Statistical analyses of soil variability: effects of variability on level-basin irrigation of

wheat D.J. Hunsaker and D.A. Bucks (Beltsville, MD, USA) ..................................................... 177

Modeling irrigation deliveries for tertiary units in large irrigation systems R.A.D. Kemachandra and V.V.N. Murty (Bangkok, Thailand ) ....................................... 197

Field verification of a microcomputer irrigation model N. Foroud, E.H. Hobbs, R. Riewe and T. Entz (Lethbridge, Alberta, Canada) ................ 215

A simple model for extrapolating the electrical conductivity data of gypsum containg soils from reference soil extract data S.G.K. Adiku (Legon, Ghana), M. Renger and C. Roth (Berlin, FRG) .......................... 235

Book Review ............................................................................................................................. 247

Vol. 21 No. 4 SEPTEMBER 1992

Research Papers Agricultural water balance of Yunnan Province, PR China: agroclimatic zoning with a

Geopgraphical Information System A. Thomas (Germany) ...................................................................................................... 249

I nfiltration characteristics of some clayey soils measured during border irrigation B.L. Maheshwari and N.S. Jayawardane (Australia) ........................................................ 265

Sampling number and design for measurements of infiltration rates into puddled rice fields M.C.S. Wopereis, A. Stein, J. Bouma and T. Woodhead (The Netherlands) .................... 281

The effect of allocation and scheduling rules on equity and productivity in irrigation systems R.A. Steiner and M.F. Walter (USA) ................................................................................ 297

Seasonal water balance of a sandy soil in Niger cropped with pearl millet, based on profile moisture measurements M.C. Klaij (Niger) and G. Vachaud (France) .................................................................. 313