Spectral signatures of moisture-stressed wheat

One of the important parameters affecting crop yield is the availability of soil moisture to the crop. Lackof it may bring about moistur~ stress in plants which manifests itself in terms of changes in the spectral reflectance and emittence properties of plants. An experiment involving radiometric measurements over six wheat plots subjected to different irrigation schedules was conducted to test this hypothesis, Vegetation index defined in terms of cropreflectances in 0.6 to 0.7 and 0.8 to 1,1 micrometer bands was found to ben sensitive parameter to distinguish normal plants from moisture-stressed plants. The optimum period for the discrimination of such plants through remote sensing techniques has been indicated to be 45-80 days after sowing. The experiment also demonstrates that yield per unit area is linearly related to the maximum leaf-area index of the crop thus providing a possible method of crop yield prediction

In-beam gamma-ray and electron spectroscopy following the <SUP>75</SUP>As(p, n)<SUP>75</SUP>Se reaction

The level scheme of75Se has been studied through the75As (p, n) reaction at proton energies from 1.5 to 5.0 MeV.&#947;-ray and internal conversion electron measurements were made using NaI (T1) and Ge(Li) detectors and a six-gap electron spectrometer. A proportional counter and a thin window NaI(T1) detector were used to detect &#947;-rays with energies less than 30 keV. The level scheme has been established by observing the thresholds of various &#947;-rays and by &#947;-&#947; and e--&#947; coincidence measurements. New levels at 133.0, 293.2, 790.0, 953.0, 1020.8, 1184.3, 1198.5 and 1258.2 keV not observed in earlier (p, n) studies have been established. Conversion coefficients of most of the low-lying transitions have been determined. Angular distributions of some of the &#947;-rays were also measured and compared with the statistical model calculations. Definite J&#928; assignments have been made to most of the low-lying levels. Life-times of the 112.1, 133.0, 286.7 and 293.2 keV levels have been measured to be 0.69&#177;0.12, 5.3&#177;0.6, 1.35&#177;0.15 and 31&#177;2 nsec respectively. The reduced transition probabilities for various low-lying transitions have been determined and compared with recent calculations. The &#189; - and 9/2+ levels hitherto unknown in this nucleus has been identified. The structure of the low-lying levels is discussed in terms of the existing models

Utilization of Soybean Stover by Ruminants

138 p.Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1973.U of I OnlyRestricted to the U of I community idenfinitely during batch ingest of legacy ETD

Coastal morphology: a case study of the Gulf of Khambhat (Cambay)

Geomorphic processes greatly influence the industrial, commercial and recreational activities in the Gulf of Khambhat (Cambay). LANDSAT data with their synoptic and repetitive coverage have been used in studying the distribution of suspended sediments, currents and fronts and for mapping shoreline configuration and wetlands. Visual interpretation of LANDSAT Multispectral Scanner (MSS) band 6 and 7 images and diazo colour overlays was carried out for the above purpose. Colour density slicing was performed on all four MSS images for the qualitative estimation of suspended sediments. The observation of suspended sediments suggests that during the monsoon many sediments brought in by various rivers remain in suspension and start settling down with the onset of the winter season. Tides also play an important role in the movement of the suspended sediments and fronts. The concentration of the suspended sediments is high on the mainland side during the flood tide and in the centre of the Gulf during the ebb tide. The fronts are located along the mainland side during the flood tide and on the Saurashlra side during the ebb tide. The currents in the Gulf are observed to be mainly influenced by the tides. Seasonal variation in the currents are mainly due to riverine discharge. The mapping of shoreline changes and geomorphic mapping has shown significant changes taking place in the Mahi and the Narmada estuaries. These changes have threatened the cooling pond of the Dhuvaran thermal power station in the Mahi estuary