The Owner-built HomesteadScribner, 1977 - 394 หน้า |
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หน้า 77
... feet ) has been developed by the World Health Organization . The first 45 feet of such a dug well is a cast - in - place lining of concrete . Then precast concrete cylinders are assembled and lowered into the well . These act as ...
... feet ) has been developed by the World Health Organization . The first 45 feet of such a dug well is a cast - in - place lining of concrete . Then precast concrete cylinders are assembled and lowered into the well . These act as ...
หน้า 82
... feet . Under ideal conditions this nearly perfect pump will lift water as much as 500 feet from its source . You can figure on getting about 25 feet of lift for every foot of fall . For its operation the water falls through a drive pipe ...
... feet . Under ideal conditions this nearly perfect pump will lift water as much as 500 feet from its source . You can figure on getting about 25 feet of lift for every foot of fall . For its operation the water falls through a drive pipe ...
หน้า 83
... feet in diameter ( from the tip of one blade to the tip of its opposite member ) will pump from depths of 70 feet ; 8 - foot blades , from 140 feet ; and 10 - foot blades , from 250 feet . The most efficient shallow well pump is the ...
... feet in diameter ( from the tip of one blade to the tip of its opposite member ) will pump from depths of 70 feet ; 8 - foot blades , from 140 feet ; and 10 - foot blades , from 250 feet . The most efficient shallow well pump is the ...
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acid acre agricultural alfalfa algae amino acids animal areas bacteria barn beans bluegill building carbohydrates carbon dioxide cattle chlorophyll climate composting concrete cool corn cover crop rotation cultivation diet digester drainage drill earth environment equipment farmers farming feed feet fence fertilizer Figure fish forage Forester fruit garden goats grafting grain grass grazing greenhouse ground growing growth harvested heat homestead humus inches increase land layer legume livestock living located manure material mature ment method milk minerals moisture mulch nitrogen nutrients nutrition orchard organic matter oxygen pasture percent pipe plant plow polyculture pond posts pounds practice produce protein pump reduced requires Rodale Press roots rotation row crops season seed sheet composting silage silo slope sod crops soil soybeans storage structure subsoil supply surface temperature tillage tion tractor tree crops ture vegetables vitamin weeds wind winter wire wood