A number of recent articles report that analyses which account for spatial variation in eld trials in terms of correlations between plot errors are more eecient than the classical randomized blocks analysis of variance. In most cases, these eeciency comparisons are in terms of model-based or 'predicted' estimates of precision. The validity of estimates of precision has not been generally demons...

introduction the consequence of cooperation between environmental factors and circulation patterns in a long time can determine the arrangement of type and manner in humidity in geographical area. the knowledge about space dispersion in geographical areas assists preparing sound programming and proper environmental decision making. relative humidity is the most commonly used measurements of moi...

The Government of Rwanda is implementing policies to increase the area of Arabica coffee production. Information on the suitable areas for sustainably growing Arabica coffee is still scarce. This study aimed to analyze suitable areas for Arabica coffee production. We analyzed the spatial distribution of actual and potential production zones for Arabica coffee, their productivity levels and pred...

The scarcity and uneven distribution of precipitation stations in the inland river basins of the Northeastern Tibetan Plateau restrict the application of the distributed hydrological model and spatial analysis of water balance component characteristics. This study used the upper Heihe River Basin as a case study, and daily gridded precipitation data with 3 km resolution based on the spatial int...

difficult to assure within block homogeneity. Plots close together may be more similar than distant ones. Spatial Multienvironment Trials (MET) are used to make cultivar recomvariability refers to the tendency of genotype responses, mendations about genotypes in plant breeding programs. Because of the presence of genotype environment interaction, METs are ususuch as yield trends, to follow the ...

The level of detail (LOD) of a 3D city model indicates the model’s grade and usability. However, there exist multiple valid variants of each LOD. As a consequence, the LOD concept is inconclusive as an instruction for the acquisition of 3D city models. For instance, the top surface of an LOD1 blockmodelmay bemodelled at the eaves of a building or at its ridge height. Such variants, which we ter...

estimation of weed damage threshold is essensial in site-specific weed control programs. this experiment was conducted to determine the spatial distribution of weeds damage threshold in two wheat feilds. data related to weed biomass and crop yield were collected from sampling at 120 and 135 points of the first and second fields respectively based on a 4×4 m grid at research field of agricultura...

Spatial variation in landscape and soil properties combined with temporal variations in weather can result in yield patterns that change annually within a field. The complexity of interactions between a number of yield-limiting factors makes it difficult to accurately attribute yield losses to conditions that occur within a field. In this research, a back-propagation neural network (BPNN) model...