灌漑麦作の研究(第1報) : 島根県三瓶南山麓に於ける灌漑麦作の実態 : (附) 鳥取県に於ける灌漑麦作の実態

(1) In the southern foothill of the Mt. Sanbe, Shimane-Ken, there is a remarkable customary for barley cultivation without using any fertilizers by letting water flow out constantly on all over the flatting drill.
(2) This customary is derived from experience for such purpose as to prevent snow dameges, to keep temperature and to melt out snow. It is believed that he customary has been carried out since 150 to 200 years before approximately.
(3) In old times, this customary prevailed in a wide area, but declining at present because of insufficient water, ample supply of manures, the introduction of snow proof varieties and the development of cultivational techniques.
(4) This region is located on the volcanic sandy loam and its 20-30 cm underground is a sandy soil of rich gravels togather with good drainage condition.
(5) The irrigation water contains no particular elements. The temperature indicates 7° to 8℃ in winter season.
(6) The irrigating duration lasts for about 90 days from late December to late March next year.
(7) The barley farmland inclines to 2 to 3°degrees so as to get better irrigation all over the surface.
(8) The growth of barleys are excellent as well as their tops and roots in the well watered farm.
(9) The riping stage hastened more or less.
(10) In the vicinity of Shikano-Machi, Tottori-ken, ther is an another customary of cultivation for barleys in the season-off ricefield. The irrigation is operoted in rows to rows apart.
(11) Ther are two different occasions of the irrigation.
(a) Only when there is snow on the farm.
(b) From late December tb late March next year.
(12) There are no particular elements are found in the irrigation water.
(13) The riping stage more or less hastend.
(14) The yield of barleys are under normal lebel.