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Saturday, April 21, 2018

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Search results on 04/21/18

11126. Rasmussen, V.P. and R.L. Newhall. 1991. Dryland tillage demonstration /research plots.. Agri-hint Series 109, Coop. Ext., Utah State Univ., Logan..
Seven cropping systems are being compared to determine fallow efficiencies and erosion potentials. The annual crop system outyielded the crop-fallow systems in the two years of study.

1503. Dalley, W.J.. 1970. Alternatives in machinery management on Juab County, Utah dry farms.. M.S. Thesis, USU, Logan, UT.
An economic study of farm size versus per acre equipment costs of production. Machine costs per acre of grain produced and total costs (fuel, labor, plus machinery) for the 3 size classes were, respectively: 100-500 ac. - $10.99, $16.27; 500-1000 ac. - $5.66, $10.25; 1000-2000 ac. - $3.21, $7.13.

1549. Dawson, R.C., V.T. Dawson, and T.M. McCalla. 1948. Distribution of microorganisms in the soil as affected by plowing and subtilling crop residues.. NE Agr. Expt. Sta. Research Bull. 155.
Study in Nebraska on distribution of organisms in 0-1 and 1-6 inch depths. Top inch contained greater numbers where residues were subtilled, lower depth when residues were plowed. Effect usually disappeared 9 months after application. Microbial numbers varied with sampling date. Higher residue rates stimulated higher microbial numbers. No evidence of selective stimulation of specific microbial groups.

5389. Prato, T., H. Shi, R. Rhew, and M. Brusven. 1989. Soil erosion and nonpoint-source pollution control in an Idaho watershed.. J. Soil Water Cons. 44:323-328.
Offsite economic damage from cropland erosion has been estimated at between $2-6 billion. This study modelled erosion reduction, improvements in surface water quality, and impact on net returns for a watershed near Lapwai, Idaho, using a 1000 acre wheat-pea farm as the prototype. It concluded that total net farm income in the watershed increased 1.5% when average erosion was reduced to T. The study used a GIS system to model the outcomes of farm practice choices. Soil erosion was calculated with the USLE. Water quality impacts were estimated with AGNPS. Eleven resource management systems were modelled for each of the 16 farms in the watershed. The results indicate that minimum tillage with either cross-slope farming or contour farming is the most economically efficient resource management system for reducing erosion. Averaged over all farms, such a system increased annualized net returns by $1.05/ac and $1.38/ac, and reduced erosion by 5.2 T/ac/yr and 5.6 T/ac/yr for the min-til cross-slope and min-til contour systems respectively. To achieve a 70% erosion reduction (equalling 2T), no-till and permanent vegetation were the required systems. Net farm income increased 1.5% when total erosion was reduced 40%, and decreased 35% when erosion was reduced 70%. Total net farm income declined rapidly beyond 40% erosion reduction. Figure 5 shows net income versus erosion reduction.

5725. Rasmussen, V.P. and R.L. Newhall. 1989. High residue conservation tillage increases soil moisture and profits. IN: Utah Agricultural Statistics, 1989. p. 121-124. Utah Agricultural Statistics Service, Salt Lake City, UT.
Three years of data are reported for several locations comparing a number of consevation tillage and cropping systems. The no-till and chemical fallow were better both for conserving soil and moisture, and generated the highest net returns. The chem fallow conserved about 1-2 inches of soil moisture. Erosion under the no-till chem fallow ranged from 1-5 T/ac compared to 17-30 T/ac with conventional tillage. The study included tests of continuous cropping, but more years are needed to make an economic comparison.

5934. Rogers, R.D.. 1982. Undercutting as a wildlife conservation method.. Proc. Great Plains Ag. Council, p.25.
Using an undercutter without mulch treaders instead of surface tillage implements for fallow weed control in spring can save up to 50% of the bird nests in wheat stubble. Wheat stubble is often undisturbed following harvest and provides a good source of winter food and cover for wildlife. Nest survival increases directly with undercutter size and can potentially exceed 50% with large, wide-bladed undercutters. Both for wildlife and agronomic benefits, the use of an undercutter for the first spring fallow weed control operation is strongly recommended.

6711. Stephens, D.E., H.M. Wanser and A.F. Bracken. 1932. Experiments in wheat production on the dry lands of Oregon, Washington, and Utah.. U.S.D.A. Technical Bull. #329.
Experiments in wheat production on the dry lands of Oregon, Washington and Utah

7693. Yan, Ying. 1989. A model for predicting soil loss ratio and crop production in eastern Washington. M.S. Thesis, Dept. of Agronomy and Soils, WSU, Pullman, WA.
The model (SHUI) predicts soil erosion and crop production under different crop rotation, tillage operation, and crop residue management conditions. It simulates the soil-water budget, crop and root growth, top dry matter production, grain yield, and residue production and loss, and predicts the soil loss ratio. Validation data are included.

9284. Bracken, A.F. and G. Stewart. 1930. A quarter century of dry farm eExperiments at Nephi, Utah.. Utah Agr. Expt. Sta. Bulletin 222, Logan, UT..
Dry farming began in Boxelder County in 1863 and has now extended to all parts of the state where precipitation and topography permit favorable development. Alternate cropping with fall or early spring planting is the general practice. On page 41, there is a summary of results covering the following subjects: weather, data, treatment of land before plowing, plowing, treatment of summer fallow seeding experiments, cropping experiments, cereal varieties, fertility experiments, and rotations.

11136. Rasmussen, V.P. and R.L. Newhall. 1991. Dryland tillage demonstration/research plots.. Agri-hint Series 91-111, Coop. Ext., Utah State Univ., Logan.
Continuous winter or spring wheat did not yield as well as the chem-fallow or conventional systems.

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