Photothermal Ratio Affects Plant Quality in `Freedom' Poinsettia

Using Paclobutrazol to Control Height of Poinsettia ‘Freedom’

Late-season height control of poinsettia (Euphorbia pulcherrima) is difficult since most chemical growth retardants adversely reduce bract size when applied after first bract color. Paclobutrazol (Bonzi) controls stem elongation late in poinsettia crop development but can excessively reduce bract size if improperly applied. Two experiments were conducted to quantify how paclobutrazol applicatio...

Performance ratio - Quality factor for the PV plant

Performance ratio - Quality factor for the PV plant

Ammonium to Nitrate Ratio Affects Protocorm Like Bodies PLB Formation In vitro of Hybrid Cymbidium

Carbon and nitrogen are the two elements that most affect plant organogenesis. In vitro, usually as part of the macronutrients. Some anecdotal evidence from the literature suggests that the ammonium (NH4+) to nitrate (NO3–) ratio may affect orchid organogenesis. In this study, to test this hypothesis, different NH4+: NO3– ratios were tested on the development of protocorm-like bodies (PLBs) of ...

Freedom and quality of life.

There is a double belief that causes health authorities to hold back from vigorously promoting healthy behaviours. The first is linked to the idea that there is a trade oV between the quantity and the quality of life. Why increase the individual length of life if it is at the price of the quality of the years lived. But what do we mean by the quality of the years lived? Happiness or well being?...