on the behaviour of a stressed cotton canopy in a direct air stream

reflectance variations of a stressed cotton canopy were conducted in the presence of a fan-generated air stream to investigate the effects of air movement and the resulting temperature changes on remotely-sensed data. the initial drop in reflectance after application of the air stream was found to be greatest in the morning because leaf t..

effect of the wettability of the injection nozzle on the size of oil droplets in water

the effect of the wettability of an injection nozzle on the size of oil droplets in water has been studied. dodecane as an oil was dispersed into a continuous water phase through various polymers attached to the top of each single nozzle. the polymer filters used were polyethylene (pe), poly(vinyl chloride) (pvc), poly(vinyl alcohol) (pva..

two worlds of cotton

the importance of maintaining and accurately assessing the quality of raw cotton is discussed: three major aspects that influence a spinner's choice of raw materials are: quality of yarn that can be made from the cotton; magnitude of weight losses during processing; how efficiently cotton can be processed and adaptability to new processin..

problem with nitrates

according to a recent u. s. department of agriculture report that focused on agricultural counties, and based on collected data from the u. s. geological survey, drastic (a standardized system for evaluating ground water pollution using hydrogeologic settings), and fertilizer use data, ground water contamination from nitrate-nitrogen appe..

short staple cotton under micro and level-basin irrigation methods

advanced irrigation methods and water management practices are needed for high yields with minimum water applications. a three-year study using recently introduced surface-micro and level-basin irrigation methods was conducted in central arizona on a nonuniform sandy loam soil to determine optimum water placement and irrigation frequency...

reduction in soybean seed yields by ozone air pollution?

the national crop loss assessment network (nclan) determined that soybeans were more sensitive to ozone than other major agricultural crops, including corn, wheat, and cotton. however, new jersey scientists in two recent reports question the validity of the nclan results since the utilization of a different method to assess the impact of ..

evaluation of the repeat-unit heterogeneity of amylose nitrates by **1**3c nmr spectroscopy

amylose nitrates of various degrees of substitution are synthesized and the **1**3c nmr spectra are studied in solution. a full interpretation is given of all the signals of the **1**3c nuclei, and the contents of mono-, di-, tri- and unsubstituted $alpha$ -d-glucopyranose units in the amylose nitrate macromolecule are determined. it is e..

**1**3c nmr study of cellulose nitrates

cellulose nitrates of various degrees of substitution, prepared by nitration of cotton and wood cellulose in different acidic media have been studied by high resolution **1**3c nmr in solution. the relative contents of elementary units differing in number and position of nitrate groups were calculated from the integral intensities of spec..

conversion of cellulose into carboxylic acids by a drastic oxygen-alkali treatment

cotton cellulose was treated with 1 and 3 m sodium hydroxide at 170-190 $degree$ c under oxygen pressure of 200 and 400 kpa. about 60-70 percent of the cellulose was converted into low molecular weight carboxyli acids, which were analyzed by capillary gas-liquid chromatography-mass spectrometry. in all, 60 acids were identified, of which ..

large-scale digestion of willow-dust in batch digesters

a pilot plant to process willow-dust for biogas production in a battery of six batch digesters was installed in a textile mill. the depth of loading of a tank during aerobic pretreatment affected the pattern of biogas production with a solid to liquid ratio of 1:6 or 1:1. 5. about 725 m**3 of biogas per 2 tons of willow-dust was obtained ..