Info
Concentration of the world's atmosphere may well result in substantial increases in crop production in regions where water is the primary limitation, without requiring increased irrigation. This is not to claim that the C02 increase will be beneficial in all respects,- its effects were discussed at length in Chapter 2. Dry weight increase is not the only sort of growth. Cell expansion, by water intake to the cell, controls stem and leaf extension, which in turn influences light capture root...
Natural succession on abandoned farmland
If we leave abandoned farmland alone, what sort of community will develop on it Will it become something like the natural community that would have occurred on the site If so, how long will that take Various sorts of vegetation can develop, including forest, open woodland, grassland and heathland. Here I consider only forest and grassland. In this chapter we are concerned with the establishment of forest on farmland, where trees have been absent for some years. If, on the contrary, after forest...
