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1. 发明授权

US4027428A Method and apparatus for conserving soil water 失效
标题翻译：保护土壤水分的方法和装置
公开(公告)号：US4027428A
公开(公告)日：1977-06-07
申请号：US592246
申请日：1975-07-01
申请人： Daniel I. Hillel
发明人： Daniel I. Hillel
IPC分类号： C09K17/52 , A01N7/02
CPC分类号： C09K17/52 , Y10S47/10
摘要： Natural soil is formed into clods ranging in size from a minimum dimension of about 5 mm to a maximum dimension of about 10 cm, and a hydrophobic agent is applied to the surface of the clods to increase the contact angle of water on the exposed grain surfaces of the clods to an angle greater than 90.degree., which makes the clods water repellent. The clods thus treated are employed to form the top layer of soil. The treated clods conserve soil water by allowing maximal intake of water and by constituting a barrier which reduces water evaporation. Such soil water conservation together with other advantages enable farming on land in regions which could never successfully be farmed before.An apparatus for forming and treating the clods has a lifting device for lifting the top layer of soil of a field to a screening device for breaking up the soil to have a maximum dimension of about 10 cm and to drop the broken up soil back to the field. A chamber having an open bottom surrounds the screening device, and nozzles direct a spray of liquid hydrophobic agent into the chamber to coat the clods. Alternatively, a blower may direct a powdered hydrophobic agent into the chamber. The screening device may be an apertured continuous belt, continuously moving and vibrating between a pair of horizontal axes, the soil being directed by the lifting device to the upper course of the belt.
摘要翻译：天然土壤形成尺寸从大约5mm的最小尺寸到约10cm的最大尺寸的粘土，并且将疏水剂施加到地块的表面以增加暴露的颗粒表面上的水的接触角的土块角度大于90度，这使得地块防水。这样处理的块体被用来形成顶层的土壤。处理过的土块通过允许最大摄入水并通过构成减少水蒸发的屏障来保存土壤水分。这种土壤水分保护与其他优点相结合，可以在以前从未成功耕种的地区的土地上进行种植。

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