Abstract: It is difficult to weigh the light objects by weighing balance accurately when measured individually. If several light objects are weighed in groups rather than individually then the precision of the estimates increases quite considerably. There are two types of balances one is chemical balance and other is spring balance. Spring balance is similar when only one pan of chemical balanc...

We would like to welcome our readers to the twenty-eighth issue of 49 th Parallel and our second of 2012. In the last few months there have been some exciting developments at the journal and we hope that 49 th Parallel will continue to flourish in the future. We would like to welcome our new Articles Editor, Galateia Demetriou, to the 49 th Parallel team. Galateia is a second year doctoral rese...

THE RESPONSE of hitherto known practical forms of seismographs depends upon the relative motion of a pendulum and the moving ground to which ~ts supporting structure is fastened. The various kinds of seismographs differ in the type of pendulum used, such as gravity, spring, torsion, and/or they differ in the type of magnifying and recording elements which they employ. They all measure or indica...

Beijing’s mountainous areas have an important ecological significance because they are ecological conservation and water source protection areas of Beijing. The impact of precipitation on the vegetation coverage of Beijing’s mountainous areas is qualitatively analyzed using multi-temporal Landsat images obtained during the last 20 years. Firstly, the influence of external factors, such as pheno...

There is limited information regarding the use of quinoa fresh leaves as a vegetable. Thus, objective this study was to promote green vegetable, well conduct season extension feasibility using high tunnels. The conducted during spring seasons 2020, 2021, and 2022 at George Washington Carver farm Lincoln University in Jefferson City, MO, USA. Three genotypes were used randomized complete block d...

The article presents the results of studying some components in vitro technology clonal rootstocks and common cherry varieties, which allow to increase efficiency its application tested varieties rootstocks. Differences viability intensity development explants depending on timing their introduction into crop, characteristics genotypes composition nutrient media were established. influence mediu...