Transitive closures of the covering relation in semilattices are investigated. Vyšetřuj́ı se tranzitivńı uzávěry pokrývaćı relace v polosvazech. This very short note is an immediate continuation of [1]. We therefore refer to [1] as for terminology, notation, various remarks, further references, etc. 1. The covering relation in semilattices Throughout the note, let S = S(+) be a semilattice (i. e...

Loss of habitat to urbanization is a primary cause of population declines as human-dominated landscapes expand at increasing rates. Understanding how the relative effects of different conservation strategies is important to slow population declines for species in urban landscapes. We studied the wood thrush Hylocichla mustelina, a declining forest-breeding Neotropical migratory species, and umb...

Fine grain products are harvested in two manual and mechanized forms. Nowadays, common combine harvesters are used, but fine grain products such as Rapeseed, Sesame and Sorghum cannot be harvested with conventional heads of combine harvesters due to the excessive grain loss in the head of the combine. Therefore, the necessity of design and fabricating machines and heads of combine harvesters be...

drought stress is the most important environmental constraint contributing to grain yield instability of maize(zea mays l.). evaluation of maize genotypes under different stresses would be useful for identifying genotypes that combine stability with high yield potential for stress-prone areas. this study was conducted to estimate grain yield stability of maize hybrids and to identify hybrids th...

genetic× environment interaction for genetic, plant breeder and animal breeding is very important. insight of g×e helps to plant breeders for genotypes evaluating precisely until select the best genotypes and release the stable genotypes for general and special environments. present study in order to achievement to high yield and yield stable in the different years, was done on the 20 advance b...