Growth of young fig trees in old fig orchard soils

Abstract

1. Replanting of young fig trees following removal of old fig trees has been recognized as a hazardous undertaking by some growers. As there was no evidence, this experiment was conducted to confirm it.
2. In the pot experiment, fig trees grew less vigorously in the fig orchard soil than in the orchard soil of other fruit tree. Trees of both plots were given enough fertilizers with manure and lime.
3. Fig trees in the plot of fig orchard soil fumigated with chloropycrin grew as much as in the other plot. This result was different from the case of citrus trees replanted in the soil of the same citrus grove (MARTIN, 1949).
4. The young fig trees of poor growth were affected with nematodes without exceptions.
5. Sand culture experiment showed that water extract of fig tree roots or fig orchard soil did not affect the growth of young fig trees.
6. Judging from the experiments, the poor growth of fig trees replanted in a fig orchard soil is considered to be largely due to nematode injury.