The Hitahdut HaIkarim BeEretz Israel (the Jewish Farmers' Union in Mandate Palestine) was called Hitahdut HaMoshavot BeYehuda VeShomron until 1927. It represented the farmers from the old moshavot. Its members included Moshe Smilansky, Tuvia Ziskind Miller, Zvi Butkovsky and Shmuel Zochovitzky ...
After the creation of the State of Israel, it was renamed the Israel Farmers' Union
See this Wikipedia (English) article
See this Wikipedia (Hebrew) article (English translation)