Search

Your search keyword '"Rijks, D.A."' showing total 14 results
Start Over Author "Rijks, D.A."
14 results on '"Rijks, D.A."'

2. WATER USE BY IRRIGATED COTTON IN THE SUDAN.

Author

Rijks, D.A.

Subjects
*IRRIGATION, *WATER in agriculture, *EVAPORATION (Meteorology)
Abstract

Studies the effects of advection on water use within irrigated areas in Sudan. Factors influencing rates of evaporation; Spatial and temporal movements of the fronts of wetting and drying; Measurement of crop attributes.

Published
1976
Full Text
View/download PDF

3. WATER USE BY IRRIGATED COTTON IN SUDAN.

Author

Rijks, D.A.

Subjects
*WATER use, *COTTON, *IRRIGATION farming
Abstract

Estimates water used by irrigated cotton in Sudan. Methods used for estimation of water; Evaluation of vertical and horizontal fluxes of water vapor during day and night.

Published
1971
Full Text
View/download PDF

4. WATER USE BY IRRIGATED COTTON IN SUDAN.

Author

Rijks, D.A.

Subjects
*WATER use, *RADIATION, *COTTON, *CROPS
Abstract

Reports on the investigations into the use of water by cotton crops in the sudan Gezira in 1965-66 and the radiation balance over the crop. Methodology of the study; Instruments used in the study; Factors that determine the long-wave loss from an irrigated cotton crop; Factors that affected the seasonal and diurnal pattern of net-radiation.

Published
1968
Full Text
View/download PDF

6. THE USE OF WATER BY COTTON CROPS IN ABYAN, SOUTH ARABIA.

Author

Rijks, D.A.

Subjects
*AGROHYDROLOGY, WATER requirements for cotton
Abstract

Presents a study on the use of water by cotton crops in Abyan delta, South Arabia. Analysis of plants grown under different rates of irrigation; Yield and lint characteristics of cotton from irrigation treatments; Relation between the decrease in yield and time of onset of water strain.

Published
1965
Full Text
View/download PDF

8. EVAPORATION IN EAST AFRICA

Author

DAGG, M., WOODHEAD, T., and RIJKS, D.A.

Abstract

Following a decision to estimate potential evaporation from meteorological observations rather than from evaporation pans, 53 agricultural meteorological stations were established over East Africa with the co-operation of several departments of three governments. Supplementary information from an additional 123 less well equipped stations was incorporated into the preparation of maps of monthly potential open water evaporation, using the Penman estimate. Annual values of potential evaporation range from more than 2,600 mm to less than 1,400 mm with 70% of the area of East Africa having potential evaporation rates, of between 1,800 and 2,200 mm per annum. There are marked seasonal variations in evaporation rates, mainly dependent on patterns of cloud cover, but average monthly rates rarely fall below 90 mm even in highland areas. These high rates of water demand have serious implications for the management of water catchments, land planning, crop breeding, tillage techniques, ground water recharge and rates of primary productivity in rangeland.

Published
1970
Full Text
View/download PDF

9. Agroforestry

Author

Darnhofer, T., Rijks, D.A., and Stigter, C.J.

Subjects
Life Science
Published
1987

10. Conclusions and recommendations

Author

Stigter, C.J. and Rijks, D.A.

Subjects
Physics and Meteorology, Life Science, Natuur- en weerkunde
Published
1988

11. Agrometeorology of the potato crop

Author

Stigter, C.J. and Rijks, D.A.

Subjects
solanum tuberosum, aardappelen, agricultural meteorology, potatoes, agrometeorologie
Published
1988

14. FOREWORD

Author

Obasi, G.O.P., primary, Sawyer, R.H, additional, Stigter, C.J., additional, and Rijks, D.A., additional

Published
1988
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results