soil loss from conservation tillage for sorghum

soil loss was measured from ridge-till, reduced-till (no-till plant cultivate), no-till, and conventional-till grain sorghum on 22.1-m long, up-and-down-hill erosion plots. soil loss ratios were computed from measurements for each crop stage of the tillage systems for use in the universal soil loss equation (usle) to estimate soil loss. a..

iodine disinfection of poor quality waters

different types of poor quality water of three different turbidity ranges (5-7, 50-54 and 93-97 ntu) were prepared by adding stream sediments, digested sludge and raw sludge to stream water different concentrations of iodine (from 1.0 to 10 mg/l) were employed to inactivate e. coli in these samples at three phs (6.0, 7.5 and 9.0) and thre..

use of multi-temporal ndvi measurements from avhrr data for crop yield estimation and prediction

this paper investigates the potential of using vegetation index profiles from avhrr data to monitor crop yield. a retrospective study and predictive study is presented, for 1986-1988 and 1989 respectively, for an area in northern greece. results are encouraging for operational crop monitoring. yield for wheat, cotton, rice and maize crops..

photodegradation of oxidized cotton cellulose

different functional groups were systematically introduced into cotton cellulose and their effect on the stability of cotton toward photochemical degradation was examined. first, the cotton was progressively oxidized with sodium metaperiodate up to an oxygen consumption of 2.45 atom per 100 anhydroglucose units (agu) to form 2,3-dialdehyd..

studies on the alkaline degradation of cellulose: part ii effect of the supermolecular structure of the pulp

the supermolecular structure of cellulosic pulp plays an important role in its alkaline degradation behaviour. in spite of the well-known compact, ordered and less accessible supermolecular structure of cotton cellulose, it has greater susceptibility to alkaline oxidative degradation than bagasse cellulose. bagasse kraft pulp undergoes in..

effect of refining with sodium hydroxide-urea solution on the acetylation behaviour of cellulosic fibres

the presence of urea during cold and hot alkali refining of bagasse kraft pulp and cotton linters improves their properties. the physical and submicroscopic characteristics of linters are mainly affected. the presence of urea increases the degradation and solubility of the more hydrophilic short-chain carbohydrates and results in better h..

floating vertical solar still for desalination of marsh water

the performance of a floating conical solar still used for producing drinking water in brackish marsh areas has been investigated. the new proposed still consists of a vertical conical-shaped blackened cotton wick installed inside a floating transparent glass cover of similar shape. the base section of the floating cover was properly desi..

gel permeation chromatography of vegetable-oil-based printing ink vehicles

the apparent weight-average molecular weights (m $over bar$ //w) of ink vehicles made from soybean, safflower, sunflower, cottonseed, and canola oils were compared by gel permeation chromatography (gpc), and the correlation between viscosity and m $over bar$ //w of these vehicles was established. apparent m $over bar$ //w of vegetable oil..

aerial spray deposition in cotton

the effect of aerial application parameters on the deposition of water-based sprays on mid-season cotton canopies was evaluated in three field studies. fluorescent dye tracer spray deposits were measured on cotton leaves and three different types of artificial samplers at the top and midway down in the plant canopy, and on ground-cover sh..

characteristics of air-assisted and drop-nozzle sprays in cotton

the effects of air-assisted, drop-nozzle, and over-the-top spray applications were characterized with a wide array of targets and chemicals in mature cotton foliage. spray rates of 47 and 94 l/ha were applied at droplet volume median diameters (d//v//.//5) ranging from 114 to 192 $mu$ m. increased spray rate predominantly increased deposi..