I Tech designs
Appropriate Technology for Small and Subsistence Farms
PO Box 413, Veneta, OR 97487, USA

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These I Tech files are also located at University of California, Davis
Appropriate Technology for Small and Subsistence Farms
Topic:  Page title, content,  file size, last update          Open 
Food dryer:   Farm-scale food dehydrator. (88 kb, 11/1998 updated 11/2009)       .pdf
Food dryer:   Solar tunnel food dryer.  DIY*: plans for a solar tunnel food dryer,  a modified Hohenheim design, optimized using the Penman-Monteith evapotranspiration equation.  Solar radiation is the primary contributor to evapotranspiration, hence the solar dryer maximizes the exposure of products to sunlight with unobstructed air flow to remove water vapor (it does not maximize temperature inside the dryer).
(492 kb,3/2008)  
Garlic:  Hand operated garlic trimmer. (15 kb, 8/1999)
Grain huller:  Grain huller for rice, spelt wheat, quinoa and millet.  DIY: plans for converting a hand mill to a grain huller (71 kb, 8/1989)    .pdf
Grain huller: Centrifugal huller for sunflower and naked barley seeds.  DIY: convert a kitchen sink garbage disposer into a grain huller  (165 kb, 1/2010)     .pdf
Grain thresher:  Conversion of a leaf shredder/wood chipper to a grain thresher.  DIY: plans for a grain thresher suitable for amaranth, bean,oat, rice, wheat etc.(263 kb, 8/1994 updated 11/2009)      .pdf
Insulation: Skylight insulation:  3 ways to increase the insulation of home skylights (73 kb, 6/2005)    .pdf
Pests:   Enhanced electronic black light bug zapper. (44 kb, 11/2000, updated 11/2009)    .pdf
Pests:   Mouse guard: a non climb barrier strip against mice using oil coated aluminum foil tape (130 kb, 3/2007b)    .pdf
Pests:   Protecting trees from nutria  (84 kb, 6/2005)    .pdf
Seed cleaner:   Hand operated screen seed cleaner.  DIY: plans for a shaker screen seed cleaner.  Machine is easy to clean, between change of seed type or seed lot   (603 kb, 3/2014)     .pdf
Seed cleaner:   Farm scale electric winnower: DIY: seed cleaner using air to separate seeds from chaff (207kb,12/2005)   .pdf
Seed cleaner:   Hand operated winnower, added a larger version (438 kb, 2/1986, updated 4/2016)   latest revision    .pdf
Seed cleaner:     Small electric winnower (9kb, 2/1986)   .pdf
Seed storage:    Hand operated vaccum packing system for seed storage (15 kb, 11/1989)    .pdf
Weed control:   Flex tine cultivator conversion: DIY: convert a spike tooth harrow to a tine cultivator (367 kb, 1/2007)    .pdf
Weed control:   Propane flame weed burners (147 kb, 2/1997, updated 11/2009)    .pdf
Weed control:   Serrated hand hoe and mower blades (31 kb, 8/1991)    .pdf
Weed control:   Weeding spade (47 kb, 2/1996)    .pdf
Oregon Farm (USA)
Bean: Growing organic black beans in Veneta, Oregon: (western Oregon, 17 miles west of Eugene)  Planting dates, fertilizer, weed cultivations, harvest and post harvest (295 kb, 10/2009b)   .pdf
Canada thistle: Canada thistle control with mechanical cultivation using sweeps (preliminary notes, 434 kb, 1/2018) latest addition   .pdf
Dry farming: Vegetable and field crop rooting depths and lateral root distances:  data compiled from JE Weaver and WE Bruner, 1927. Root Development of Vegetable Crops. McGraw-Hill Book Co. and from JE Weaver, 1926.  Development of Field Crops (106 kb, 6/2016)     .pdf
* DIY:  "Do it yourself", make your own equipment
Something else
Koans, part 1: selections mostly from The Gateless Gate, a collection of koans by Mumon (1183-1260). Comments on selected koans by student t (155  kb, 1/2019) .pdf
Koans, part 2: selections from The Blue Cliff Record, a collection of koans by Yuan-wu (1063-1135). Comments on selected koans by student t (290 kb, 4/2019) .pdf