Browse on keywords: fertility ND
Search results on 09/25/18
2232. Grabe, D., F. Bolton, C. Garbacik, and J. DeNoma. 1989. Response of winter wheat to yield-enhancing agents.. Columbia Basin Agr. Research Spec. Report 840.
Tested a number of non-traditional products, including YEA!, Amplify-D, Car-Dak, Bio-Mag seed treat, seed moisturing. YEA! had a small but significant effect on seedling growth, while the other products did not. No yield responses were observed. Seed moisturizing with various pressure treatments did not appear to have any field benefits.
3288. Pan, W.L. and A.G. Hopkins. 1991. Plant development, and N and P use of winter barley. I Evidence of water stress-induced P deficiency in an eroded toposequence.. Plant Soil 135:9-19.
Winter barley was grown at three landscape positions of a representative toposequence in the Palouse region to identify soil factors which limit plant development and nutrient use efficiency in the eroded slope positions. Subsurface P was severely deficient at eroded ridgetop and sideslope positions. Drying of surface soil during the growing season prevented roots from using much surface applied P. This moisture stress-induced P deficiency suggests that deep placement of P is needed to build subsoil P levels for enhanced productivity on these eroded sites.
754. Bennett, W., D. Pittman, D. Tingey, D. McAllister, H. Peterson, and I. Sampson. 1954. Fifty years of dry land research (at the Nephi Field Station).. Utah Agr. Expt. Sta. Bulletin 371.
Summarizes the results of 50 yr of research at the Nephi Field Station in cental Utah. Discusses climate - spring rainfall crucial, fall emergence of wheat correlated to high yields. Ave. annual precipitation is 12.65 in. Tillage experiments - fall verus spring plowing did not affect yields, while late spring plowing lowered yields. Plowing to 8" depth increased yields by 8% compared to plowing at 5". Yields were higher with plowing and no further cultivation on fallow (weeds controlled) than with normal fallow tillage. Yields were poor with stubble mulch. Fertility: A pea green manure increased wheat yields both in the short and long term. Wheat yields were sometimes depressed by green manure, due to moisture shortage or N immobilization. Manure application increased wheat yields in all treatments, and was more beneficial in wet years. N fertilizer increased wheat yields and protein. Burning straw increased yields for 30 yr, then they began to decline. No response to P. Wheat-fallow gave the greatest yields and net returns, and wheat was the only crop distinctly benefitted by summerfallow. Alfalfa depressed the following wheat yields but improved soil fertility. Continuous wheat yielded less than 40% of wheat-fallow. Wheatgrasses showed potential for forage and seed. Spring wheats yielded 60% of winter wheat. Only 32% of rainfall was stored as soil moisture in summerfallow. Overall, yields were low (15-25 bu/ac) and treatment differences were small (1-3 bu). These results predate the semidwarf wheat varieties.
1558. Day, J.M., D. Harris, P.J. Dart and P. Van Berkum. 1975. The Broadbalk experiment: an investigation of nitrogen gains from non-symbiotic fixation. p. 71-84 IN:. W.P. Stewart (ed.), Nitrogen fixation by free living microorganisms, Cambridge Univ. Press.
3308. Anon.. 1992 May. Wood ash may prove useful as soil enhancer.. Washington Water Power Co. Gazette.
Wood ash from WWP's generating plant is being evaluated as a potential agricultural liming agent. The ash is currently disposed in a landfill. Greenhouse and field experiments at the University of Idaho show promise for its agronomic use. A 50-acre field test near Springdale, WA is under way on a spring barley crop.
3356. Jain, J.M., G. Narayanasamy, M.C. Sarkar and M.N. Datta. 1980. An evaluation of nitrification retardation property of Citrullus colosynthis.. J. Indian Soc. Soil Sci., 28(4):480-484.
An evaluation of nitrification retardation property of Citrullus colosynthis cake and its influence on yield and N uptake by wheat. Citrullus colosynthis oilcake was tested as nitrification retarder under laboratory and greenhouse conditions. The same showed NH4-N conservation when applied at the rate of 5 and 10% by weight of urea. Higher rate (20%) of the cake resulted in NO2-N accumulation leading to lower N recovery by wheat.
3770. Krchnavy, Z. and M. Ambrozova. 1979. The function of the biological component of soil in the no-tillage monoculture wheat-growing system.. Rostlina Vyroba, 25(9):893-900.
Studied the interaction of organic manuring (cattle slurry, catch-crop for green manuring, and combination) and a five- to eight-year monoculture of winter wheat sown in uncultivated soil. Results indicate that for almost all microbial indices, particularly those concerning the conversion of carbonaceous substances, ammonification and phosphate activity, higher values can be observed in the soil left without ploughing than in the cultivated soil. Nitrification decreased. The combination of the catch crop and sowing in uncultivated soil encourages the general biological activity more intensively than in the case of ploughed soil.
4265. McDole, R.E. and C.G. Painter. 1979. Wonder products in agriculture.. ID Agr. Expt. Sta. CIS #510.
Advises caution about any miracle products being sold.
5791. Reichenberger, L. and J. Russnogle. 1989. Farming by the foot.. Farm Journal, March 1989, 113(6):11-18.
These articles report on the development of more landscape-intensive crop management in a number of states. Soil variability is a universal fact, and more growers are farming by it rather than field boundaries. Some are using grid systems of 3-10 acres to delineate management units. Computerized fertilizer applicators help make it feasible, as do new technology such as on-the-go nitrate and organic matter read-out, and yield mapping. Montana State Univ. researchers Jeff Jacobsen, Jerry Nielsen, and Pat Carr found yield variations in Montana wheat and barley fields ranging from 25-75 bu/ac in one field, 23-58 in another, and 22-35 in a third one. Each had received a uniform rate of fertilizer. Development of a soil variability map is a first step, and infrared photography can add more detail. Then create a soil management map that includes crop history. Then take soil samples from the management units to develop fertilizer recommendations. The GPS satellite system will enable very precises location in fields for intensive management. Farm machinery moving 7-10 mph would get a reading every 10-20'. Kansas State researchers have developed an on-the-go yield monitor for the combine. University of Nebraska researchers have a machine that recognizes weeds and only sprays herbicide then. Purdue researchers have an organic matter sensor that mounts on a tillage implement.
6276. Singh, H. and J.P. Agarwal. 1983. Studies on nitrogen fertilization and weed management in wheat.. Indian J. Agron., 28(1):23-29.
About 40-45 kg N/ha could be saved by pre-emergence application of tribunil over the conventional method of weeding.