Showing papers by "Indian Agricultural Statistics Research Institute published in 1992"
TL;DR: In this paper, the normalized difference and ratio vegetation indices computed from the spectral responses are used to obtain homogeneous vegetation vigour stratifications of the cropland of the study area.
Abstract: Landsat Thematic Mapper data are utilized to improve upon the ground yield survey estimates for wheat in India. The normalized difference and ratio vegetation indices computed from the spectral responses are used to obtain homogeneous vegetation vigour stratifications of the cropland of the study area. Certain post-stratified estimators that make use of these stratifications are investigated and are shown to provide improved crop yield estimates.
37 citations
TL;DR: In this paper, a Markov chain approach has been adopted to forecast sugarcane yield two years data (1977-78 and 1978-79) on biometrical characters and yield collected by IASRI, New Delhi under the pilot study on pre-harvest forecasting of sugar cane yield in Meerut district (UP).
Abstract: Markov chain approach has been adopted to forecast sugarcane yield Two years data (1977–78 and 1978–79) on biometrical characters and yield collected by IASRI, New Delhi under the pilot study on pre-harvest forecasting of sugarcane yield in Meerut district (UP) were utilised for the study Yield forecasts at 7–8 months after planting (about 2–3 months before harvest) were very close to the observed ones, per cent deviations from observed being 4% in 1978–79 and 2% in 1977–78 This study thus reveals that Markov Chain method can be successfully used in crop yield forecasting
11 citations
TL;DR: In this article, the E-optimality of block designs under a general heteroscedastic setting is studied and bounds for the smallest positive eigenvalue of C-matrix are obtained in some general classes of connected designs.
Abstract: This paper mainly studies the E-optimality of block designs under a general heteroscedastic setting The C-matrix of a block design under a heteroscedastic setting is obtained by using generalized least squares Some bounds for the smallest positive eigenvalue of C-matrix are obtained in some general classes of connected designs Use of these bounds is then made to obtain certain E-optimal block designs in various classes of connected block designs
4 citations
TL;DR: The genotypic value is characterised in terms of transmittable and residual genetic values and components of genetic variance redefined which can be estimated by the conventional procedure based on resemblance between relatives.
Abstract: In analogy to the concept of breeding value defined for random mating equilibrium populations, the “transmittable genetic value” of an individual is defined as the average value of its expected progeny for any system of mating. The genotypic value is then characterised in terms of transmittable and residual genetic values and components of genetic variance redefined which can be estimated by the conventional procedure based on resemblance between relatives.
4 citations
TL;DR: A general expression for response to selection appropriate for both random and non-random mating situations is derived and illustrated with full-sibbing.
Abstract: A general expression for response to selection appropriate for both random and non-random mating situations is derived and illustrated with full-sibbing.
3 citations