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Start Over Descriptor "RICE FIELDS" Publication Year Range More than 50 years ago
3 results on '"RICE FIELDS"'

1. AN EVALUATION REPORT ON OMS 786 IN RICE FIELDS

Author

A. Naghib Hazrati and E. Javadian

Subjects
Rice fields, Breeding places larvicides, Public aspects of medicine, RA1-1270
Abstract

Regarding the importance of rice fields, as the main mosquito breeding places, use of chemical larvicides has been under consideration in Malaria Eradication Programs. In this trial, OMS 786 was used, to study the method and cost of application of this larvicide in the rice fields. Two form of larvicides (1% sand granule, and 50% E.C.) were used in four formulations. (10 and 15 kg. of 1% S.G./hectar, 100 and 150 ml. of 50% E.C./hectar).The density of Anopheline and Culex larvae were checked before application, and also in specific intervals after application, in different plots, and were compared with control. The results of the trial shows, that OMS 786 (especially in E.C. form) can successfully be used in the rice fie1ds to eliminate the mosquito activities in the problem areas. The trial also shows that the cost of operation (especially for 50% E.C.) is less than other methods.

Published
1972

2. CHARACTERISTICS OF U. S. RICE FIELDS AND THEIR EFFECTS ON GROUND MOBILITY.

Author

ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MS, Kennedy, J. G., Rush, E. S., ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MS, Kennedy, J. G., and Rush, E. S.

Abstract

The primary objective of this study was to obtain information on the environmental characteristics of rice fields in the United States and the effect of these characteristics on ground mobility for comparison with similar characteristics of rice fields in Southeast Asia as data from the latter become available. Twenty-two study sites were located in rice fields in a variety of soil types and under various cultural practices in Arkansas and Louisiana. Fifteen of the 22 sites were selected for data collection several times during a one-year period (March 1963-March 1964) to determine the seasonal variations in soil moisture, strength, vegetation characteristics, and hydrologic geometry characteristics. Cultural practices and data from the nearest weather stations also were recorded. Profiles and spacing of surface and hydrologic geometry features were measured. General conclusions were: (a) for most U.S. rice fields tested a good correlation exists between soil strength (in terms of rating cone index) and soilmoisture content; (b) estimates of soil strength of rice fields can be made by employing the WES soil moisture -strength prediction method; (c) surface geometry features (dikes) found in U.S. rice fields would not be a significant deterrent to ground vehicles. (Author)

Published
1965

3. Study of the Characteristics of Rice Fields in the United States

Author

ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MISS, Shockley,W. G., ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MISS, and Shockley,W. G.

Abstract

The over-all purpose of this study is to determine seasonal characteristics of rice fields, pertinent to military operations, in several locations in the United States. The specific objectives of the field trips reported herein were to: (a) Collect data during the peak of the wet season in selected areas of the Mississippi Valley rice lands to (1) determine maximum moisture condictions produced by natural wetting and (2) delineate the trafficability characteristics of the soils. (b) Measure vegetation and terrain geometry of rice-field surfaces. (c) Obtain information on the cultural practices used in the U. S. rice lands. (d) Determine what information is presently available on rice lands, such as soil maps, weather records, aerial photographs, cultural practices.

Published
1963

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