new coring fluid for vuggy carbonates

a salt-weighted coring fluid that contains a biodegradable cotton-fiber product, normally used to control lost circulation, was used to obtain 1,048 ft $left bracket$ 319.4 m $right bracket$ of carbonate core from a well in the arun field in northern sumatra, indonesia. the vuggy core was free of mud solids and required special cleaning o..

spectral reflectance relationships to turbidity generated by different clay materials

the spectral response of turbid waters caused by different clay materials (bentonite clay, black cotton soil, kaoline, and grey soil) was studied using a spectro-radiometer in the 450 to 1000 nm wavelength. illumination was provided by a 1000 w lamp. the analysis shows a linear relationship between turbidity and percentage reflectance for..

roughness coefficients for selected residue materials

analysis of surface runoff on upland areas requires identification of roughness coefficients. a laboratory study is conducted to measure darcy-weisbach and manning roughness coefficients for corn, cotton, peanut, pine needles, sorghum, soybeans, sunflower, and wheat residue. varying rates of flow are introduced into a flume in which selec..

enclosed system for pesticide mixing and loading

an enclosed system was designed and evaluated for mixing and loading both liquid and dry pesticide concentrates without exposing the operator to harzardous materials. bioassays of cotton in greenhouse environments indicated two rinse cycles were adequate for removing the residue of 2,4-d pesticide/water mixtures from the experimental syst..

experimental solar greenhouse for drying of astrakhan fells

experimental solar greenhouse for drying of astrakhan fells is described. solar drier represents a metalwork 22 m**3 in volume, covered by a window pane 3 mm in thickness, and working by $double prime$ hot box $double prime$ principle. the solar greenhouse provides drying of both astrakhan fells and a series of building materials (wood, b..

hydraulic fracturing research in east texas. third gri staged field experiment

this paper presents results from research conducted on the third gas research inst. (gri) staged field experiment (sfe) well research well sfe no.3 was drilled as part of a field-based research program conducted in east texas during the past 7 years. most of the work before sfe no.3 involved the travis peak formation; however, the cotton ..

identifying and removing spatial correlation from yield experiments

in classical statistics, the effect of soil trends is compensated for by replication and randomization of treatments. two field experiments were conducted at sites with significant soil trends to evaluate the use of semivariograms for identifying spatial correlation in plot yield, and evaluate the ability of nearest-neighbor analysis (nna..

calex/cotton: an integrated expert system application for irrigation scheduling

an expert system shell called calex has recently been developed for crop management decision support. this shell provides for efficient data entry and management and permits the integration of information from a variety of sources to develop crop management guidelines. the structure of the calex knowledge base language makes it particular..

real-time irrigation scheduling of cotton with an automated pan evaporation system

high frequency irrigation control necessitates real-time monitoring of soil water, plant water status or atomospheric evaporative demand. the research objective was to determine the suitability of real-time control of subsurface drip irrigation using automated evaporation pan measurements. hourly electronic measurement of water loss from ..

fine - fibred filtrating materials

a fine - fibred filter of volume functions intended for the precision cleaning practically all kindes of liquid and gaseous media from the mechanical particles with the 0.3 mcm size and higher is made. the structure of the filter - material is formed not on the law of accident but under the treatment of the rheology forces and is controll..