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Organic & Integrated Tree Fruit Production

Friday, January 19, 2018

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623. Baker, G.O. amd K.H. Klages. 1938. Crop rotation studies.. ID Agr. Expt. Sta. Bull. #227.
T: yields, yield trends

1360. Cochran, V.L., L.F. Elliott, and R.I. Papendick. 1982. Effect of crop residue management and tillage on water use efficiency and yield of winter wheat.. Agron. J. 74:929-932.

1475. Crea, M.. 1978. Idaho agricultural commodity statistics. Historical series 1900-1976.. ID Agr. Expt. Sta. Misc. Series #43.

2052. Fox, C.P.. 1897. Idaho agriculture. ID Agr. Expt. Sta. Bull. #10.
Latah County, an important grain producer; also had apples, pears, prunes, berries. Potlatch district grew pears, nectarines, grapes. P shortages recognized on sandy river plain soils - recommended bonemeal or manure; distance to markets encouraged specialized farming.

3036. Swan, D.G., M.M. Oveson, and A.P. Appleby. 1974. Chemical and cultural methods for downy brome control and yield of winter wheat.. Agron. J. 49:793-795.

3885. Leggett, G.E., H.M. Reisenauer and W.L. Nelson. 1959. Fertilization of dryland wheat in eastern Washington.. WA Agr. Expt. Sta. Bull. #602.
This bulletin presents the results of 5 yrs of experimenting with the fertilization of wheat. During 1953-1957, 112 fertility experiments were conducted on dry land wheat throughout eastern Washington. Nitrogen fertilization significantly increased yields in 92 of the 112 experiments conducted. Whether nitrogen fertilization increased wheat yields depended largely on the amount of moisture available to the crop. Because of the decline in soil organic matter through years of cropping, the amount of available N released by soils is no longer adequate to support high wheat yields. The introduction of high yield varieties and improved tillage has increased yield potential, and this has increased the demand for N. Application rates (lb N/ac): <10" rainfall - 20-40; 10-15" - 20-60; >15" - 30-80. Different types of N fertilizer did not change yields. T: Summary of the effects of N on wheat yields, 1953-57; effect of N on yield from fallow ground.

4827. Nelson, E.. 1908. Dry farming in Idaho. ID Agr. Expt. Sta. Bull. #62.
Caldwell, ID - better sites yield 30-40 bu/ac wheat, even 60; alfalfa - several cuttings; drier sites yield 20-30 bu/ac; in Utah, 1" of rain stored in soil produces 2.5 bu wheat; summerfallow necessary; eastern WA - late spring plowing with early disking and harrowing is effective weed control; "slicker" - homemade tool in Columbia Basin to kill weeds; Subsurface packer - after plowing, increased yields in Columbia Basin 25%. Idaho soils - short on N and humus; alternate crop possibilities: milo, sorghum, field peas, alfalfa, grass; also spring emer (speltz), hulled wheat (adapted to arid conditions); WW vs. SW has 4-5 bu/ac yield advantage.

5181. Peterson, P.P.. 1919. Soil and climatic factors in relation to crop production on the Palouse.. ID Agr. Expt. Sta. Bull. #118.
8 rotations with N, P, K trts; clear response to N - 3 bu/ac on wheat at 200 #/ac NaNo3; manure response = 6 bu/ac; wheat yielded same after potatoes and fallow than peas or corn; made the most money with wheat/oats/peas ($51/ac/yr); ave. oat yield 1916 = 70+ bu/ac, 1918 = 26 bu/ac. Wheat, oats more affected by drought than corn or potatoes; this is the first mention of statistical methods. T: fertilizer response, rotation X net return.

5197. Peterson, P.P.. 1918. Soils of Latah County, Idaho.. ID Agr. Expt. Sta. Bull. #107.
Notes the great power of the soil to absorb falling rain; little cropping before 1870; native bunchgrass provided good spring pasture for cattle; history - 1887 first railroad to Genesee; very profitable line; wheat yields run as high as 70 bu/ac, seldom less than 20 bu/ac; 2 yr grain, then fallow for weed control; some interest in livestock; large farms 320-1200 ac; average 140 ac; field peas profitable in 1918; clover an option; response to S in alfalfa (gypsum 50-100 lb/ac). Low CacO3 in soil; low pH a future problem?

7424. Walker, D.J. and D.L. Young. 1982. Technical progress in yields - no substitute for soil conservation.. ID Agr. Expt. Sta. CIS #671.
Technological progress increased yield damage from erosion; higher yield reduction with successive erosion; yield damage from conventional tillage in wheat-pea rotation estimated at $8 for one year; no assurance that technology will continue to offset erosion - induced yield losses; leveling off yields in the last several years. T: erosion and yield change; technology and yield.

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