Question

swampland 5 沼沢地 当時の川中島は、幾つかの小河川が流れる沼沢地と荒地が広がるものの洪水堆積の土壌は肥えて、米収穫高は当時の越後を上回った。

Accepted Answer

50313 沼沢地 Although Kawanakajima at that time was an expanse of swampland through which a few rivulets flew and of barren land, its soil, being sediments from flood, was rich and produced rice crop more than Echigo at that time. Wikipedia日英京都関連文書対訳コーパス

Lemma	swampland
Rank	50313
Frequency	5
Japanese	沼沢地
Commentary	沼沢地
Example(eng)	Although Kawanakajima at that time was an expanse of swampland through which a few rivulets flew and of barren land, its soil, being sediments from flood, was rich and produced rice crop more than Echigo at that time.
Example(Jpn)	当時の川中島は、幾つかの小河川が流れる沼沢地と荒地が広がるものの洪水堆積の土壌は肥えて、米収穫高は当時の越後を上回った。
Source	Wikipedia日英京都関連文書対訳コーパス

Swampland 沼沢地 Kawanakajima Time Expanse Rivulets Flew Barren