I just read the latest post at Absolute Truth about the seven year Cycle mentioned in the Talmud.   I have no idea whether the Talmud is hinting at the shmittah cycle or not, so I went looking for the text..... and here is the text, from  a Kosher site [note, if you're looking for something on the internet, please use 4Torah.com rather than Google, as many Xtian sites literally copy and paste