Crop classification using airborne radar and LANDSAT data

Airborne radar data acquired with a 13.3 GHz scatterometer over a test-site near Colby, Kansas were used to investigate the statistical properties of the scattering coefficient of three types of vegetation cover and of bare soil. A statistical model for radar data was developed that incorporates signal-fading and natural within-field variabilities. Estimates of the within-field and between-field coefficients of variation were obtained for each cover-type and compared with similar quantities derived from LANDSAT images of the same fields. The classification accuracy provided by LANDSAT alone, radar alone, and both sensors combined was investigated. The results indicate that the addition of radar to LANDSAT improves the classification accuracy by about 10; percentage-points when the classification is performed on a pixel basis and by about 15 points when performed on a field-average basis

Sustainability of marine fish production in Kerala-A Bioeconomic analysis

The study has been undertaken in Kerala State in lndia with an - overall objective of analyzing the bioeconomic conditions of commercially exploited marine fishes for assessing their sustainability in the context of existing management practices. Maximum Sustainable Yield, Maximum Economic Yield and open access levels of yield and effort were analyzed using Gompertz-Fox growth model. The study concluded that the fishing effort exceeded the ecanomically optimal levels and there is unnecessary wastage of money, manpow and fuel in the fishing industry. The study stressed the urgent need for cap&lr@ fisheries management in the State which at present follows an open access fishery where regulations exist only in the form of seasonal -. closure in the monwan seaso

Supply - Demand Analysis of fish in India

The economic growth, population pressure and changes in the dietary pattern have contributed to the increase in demand for animal origin foods in lndia. The fish prices had increased many times than all other food items over the years. An analysis of fish demand and supply situation in lndia is done and projections were made for the year 2020. Price and income elasticities of fish demand were estimated using exponential function. Export demand and tastes and preferences of consumers were not included in the demand analysis. The fish supply was projected using trend extrapolation method. Estimates of demand model showed that the household expenditure on fish in general as elastic. The study revealed that with the projected population and percapita income growth rates, fish demand in year 2020 will exceed the total fish supply from marine, inland and aquaculture sectors with the current production trend

Crop classification using multidate/multifrequency radar data

Both C- and L-band radar data acquired over a test site near Colby, Kansas during the summer of 1978 were used to identify three types of vegetation cover and bare soil. The effects of frequency, polarization, and the look angle on the overall accuracy of recognizing the four types of ground cover were analyzed. In addition, multidate data were used to study the improvement in recognition accuracy possible with the addition of temporal information. The soil moisture conditions had changed considerably during the temporal sequence of the data; hence, the effects of soil moisture on the ability to discriminate between cover types were also analyzed. The results provide useful information needed for selecting the parameters of a radar system for monitoring crops

Hatchery production of Black-lip pearl oyster spat in the Andaman and Nicobar Islands: a success story

The lustrous black pearls produced by the black-lip pearl oysler Pinctada margaritifera in the inner surface its two shells have become one of the most valuable pearls on earth with prices ranging from a minimum of 100 US$and to a maximum of 10,000 US$ per pearl, in the case of those at exceptional and rare quality. Through the production of black pearls from Pinctada margaritifera, the island country of Tahili became the global leader in this business controlling 28.8% of the world market

Biometric relationships of the black winged pearl oyster, Pteria penguin (Roding, 1798) from Andaman and Nicobar Islands

The dimensional biometric relationships including that of length-weight was studied in the black winged oyster Pteria penguin, which is a candidate species for mariculture. During the life span of the winged oysters, growth in length and weight was initially 40-100 mm dorso-ventral measurement (DVM), positively allometric and subsequently became isometric (100-160 mm DVM) and finally reverted back to allometry (160-220 mm DVM). This is attributed to the increase in visceral mass of animals corresponding to gonadal maturation during the size range 100 - 160 mm DVM. In larger sized P. penguin, increase in shell length is more predominant as evidenced by large proportion of non-nacreous layer at the outer edge of the shell. There was no parallel increase in visceral mass resulting in allometry. All dimensional relationships were positive in relation to DVM; however the relationship between DVM and hinge length did not show significant R2 values (p>0.05) in all the size groups. This was mainly because, the tips of the hinge and ear were found to be broken at both the ends. Therefore, notch length is proposed as a better predictor of DVM in large hinged pterid oysters. Unlike other pterid pearl oysters, the thickness - DVM ratio showed a decline with size, indicating that bead seeding programmes can be initiated at early stage

Kansas environmental and resource study: A Great Plains model, tasks 1-6

There are no author identified significant results in this report. Environmental and resources investigations in Kansas utilizing ERTS-1 imagery are summarized for the following areas: (1) use of feature extraction techniqued for texture context information in ERTS imagery; (2) interpretation and automatic image enhancement; (3) water use, production, and disease detection and predictions for wheat; (4) ERTS-1 agricultural statistics; (5) monitoring fresh water resources; and (6) ground pattern analysis in the Great Plains

3-[3-(4-Bromo­phen­yl)-1-phenyl-1H-pyrazol-4-yl]-5-eth­oxy-2-phenyl­isoxazolidine

In the title compound, C26H24BrN3O2, the isoxazolidine ring adopts an envelope conformation, the ring N atom deviating from the mean plane of the other four atoms by an angle of 0.286°. The orientation of the phenyl ring is +sp and the bromophenyl ring is +sc relative to the attached pyrazole ring; the dihedral angles between the least-squares planes of the pyrazole and the attached phenyl and bromophenyl rings are 21.8 (3) and 41.8 (3)°

Bioeconomic analysis of sustainability of marine fish production in Kerala

The study has been undertaken in Kerala State in India with an overall objective of analyzing the bioeconomic conditions of commercially exploited marine fishes for assessing their sustainability in the context of existing management practices. Maximum Sustainable Yield, Maximum Economic Yield and Open Access levels of yield and effort were analyzed using Gompertz-Fox growth model. The study concluded that the fishing effort exceeded the economically optimal levels and there is unnecessary wastage of money, manpower and fuel in the fishing industry. The study stressed the urgent need for capture fisheries management in the State which at present follows an open access fishery where regulations exist only in the form of seasonal closure in the monsoon season