Browse on keywords: moisture CO
Search results on 05/24/13
3298. Burt, O.R. and M.S. Stauber. 1989. Dryland cropping decision theory with application to saline seep control.. J. Production Agr. 2:47-57.
A model for decision making in a flex-crop system is presented, based on plant available soil water at seeding, previous land use, and economic return. The strategy can be used for winter or spring wheat.
7633. Willis, W.O. and A.B. Frank. 1975. Water conservation by snow management in North Dakota. p. 155-162. IN: Proc. Snow Management on the Great Plains, Bismark, ND, July 1975..
100. Aase, J.K. and L.L. Reitz. 1989. Conservation production systems with and without grass barriers in the northern Great Plains.. J. Soil and Water Conservation 44:320-323.
Double rows of tall wheatgrass (Agropyron elongatum) were planted as barriers 48 ft apart near Culbertson, MT. The greatest soil water gain occurred during the harvest to spring period, with a precipitation storage efficiency ranging from 41-57 %. Annually cropped wheat and spring wheat following fallow responded positively to barrier protection. Yields were highest in the annual crop rotation of wheat-barley-safflower, followed by the 3-yr rotation with fallow. The traditional fallow-crop system had the lowest yields. Net returns paralleled yield results, and in most instances there was an economic benefit from the barriers. Also, safflower had a high net return and appears to have potential as an alternative crop in Montana.
3170. . 1988. International Symposium on Windbreaks Proceedings.. Agric. Ecosystems, Environ. 22/23.
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.
5396. Jackson, G.D. and J.R. Sims. 1977. Comprehensive nitrogen fertilizer management model for winter wheat.. Agron. J. 69:373-377.
5622. Ramig, R.E., R.R. Allmaras and R.I. Papendick. 1983. Water conservation: Pacific Northwest. p. 105-124.. IN: H.E. Dregne and H.O. Willis (eds.). Dryland Agriculture. ASA Monograph 23..
Descriptions of tillage and summer fallow practices in 200-400 mm/yr precip. zones. Covers: fall, spring, summer tillages for summer fallow; weed control; time of planting. Also descriptions of conservation tillage practices in fallow such as stubble mulching, chemical fallow. Annual cropping is included and sections cover moldboard plowing, fall chiseling, cloddy seedbeds, no-till, slot mulching. T: precipitation and soil water storage for 3 tillages. Soil water evaporation rates.
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.
5751. Redinger, G.J., G.S. Campbell, K.E. Saxton, and R.I. Papendick. 1984. Infiltration rate of slot mulches: measurement and numerical simulation.. Soil Sci. Soc. Am. J. 48:982-986.
6937. Unger, P.W., G.W. Langdale, and R.I. Papendick. 1988. Role of crop residues - improving water conservation and use. p. 69-100.. IN: W.L. Hargrove (ed.). Cropping Strategies for Efficient Use of Water and Nitrogen..