Q: I was reading your response to a reader's question about a contorted filbert. You mentioned pruning. I thought, "Pruning? Am I supposed to prune it?" It has such fascinating limbs that I've just ...

Of several growth-regulating substances sprayed, for comparative effect, on plants of nut grass at a concentration of 8000 p. p. m., 2,4-D in tributylphosphate and kerosene killed the plants in about ...

Q. I have a shiny-leafed weed (actually rather pretty) that has become a problem this year. It has only six or eight leaves, and when I pull it out of my flowerbeds, it has a bulblike structure ...