In the double-cropping systems, soyabeans were sown 2+3 d after the wheat was harvested.
The early sown large plants were not able to fully compensate for the extremely low plant density.
Differences in yields of those species sown by the farmer between the two subplots are therefore not analyzed statistically.
The land included both a vineyard and numerous pieces of worked land sown with grain.
Plant species were sown from right to left and vice versa.
Cotton was sown in patches on sandy soil.
Additional plants were sown where others had been harvested, at the edges of the subplot or between the rows of the already planted species.
Nowadays, swamps tend to be sown and harvested later than rice farms prepared on rain-fed land.
