Zobrazeno 1 - 10 of 134 pro vyhledávání: '"R. R. Bruce"'
2
Nitrogen availability to grain sorghum from organic and inorganic sources on sandy and clayey soil surfaces in a greenhouse pot study
Autor: David C. Coleman, R. R. Bruce, D. Jordan
Publikováno v: Biology and Fertility of Soils. 21:271-276
In a greenhouse pot study, we examined the availability of N to grain sorghum from organic and inorganic N sources. The treatments were15N-labeled clover residues, wheat residues, and fertilizer placed on a sandy clay loam and loamy sand soil surface
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::96584a6a1b1ad7756eac8e6595a8fb24
https://doi.org/10.1007/bf00334903
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3
Surface Soil Degradation and Soil Productivity Restoration and Maintenance
Autor: W. P. Miller, G. W. Langdale, R. R. Bruce, Larry T. West
Publikováno v: Soil Science Society of America Journal. 59:654-660
In the Piedmont of the Southern Appalachian region, soil degradation is most often expressed by crop water deficit that limits crop yield in the warm season. To evaluate the nature of variability on these cropped lands, soybean [Glycine max (L.) Merr
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::def4d1101c8d2ae117dfea5bdbb3ee9c
https://doi.org/10.2136/sssaj1995.03615995005900030003x
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4
Analysis of Aligned Data for Effect of Treatment in Agricultural Research
Autor: W. C. Mills, R. R. Bruce, A. W. Thomas, W. M. Snyder, A. L. Dillard
Publikováno v: Applied Engineering in Agriculture. 10:241-246
The use of regression analysis with dummy variables is a long-standing technique to separate data into discrete sets. The method leads to an efficient statistical test for significant difference between sets. The conventional methodology is not compl
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e6805114399e9bafb892ae0966f5c83a
https://doi.org/10.13031/2013.25848
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5
Soil Strength and Water Infiltration as Affected by Paratillage Frequency
Autor: R. R. Bruce, R. L. Clark, G. W. Langdale, D. E. Radcliffe
Publikováno v: Transactions of the ASAE. 36:1301-1305
Chisel tillage to alleviate soil compaction problems is known to provide significant benefits, but the required frequency of chisel tillage is not known. This study was designed to seek information on the required frequency of chisel tillage in moder
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::42ffd251a7aa5a1409c995afe87216e4
https://doi.org/10.13031/2013.28463
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6
An Evaluation of the EPIC Model for Soybeans Grown in Southern Piedmont Soils
Autor: R. R. Bruce, S. M. Martin, M. A. Nearing
Publikováno v: Transactions of the ASAE. 36:1327-1331
The Erosion Productivity Impact Calculator (EPIC) model was designed to evaluate the loss of crop productivity due to soil erosion. EPIC uses information on weather, soils, nutrients, topography, and other site characteristics to estimate crop growth
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::4deff4cdd21beb1259493f70f2586eeb
https://doi.org/10.13031/2013.28466
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8
Interpolation of Topographic Attributes Using Sliding Polynomials
Autor: W. M. Snyder, A. L. Dillard, A. W. Thomas, R. R. Bruce
Publikováno v: Applied Engineering in Agriculture. 8:611-616
A method for interpolating topographic attributes of hydrologic importance from field elevation data using piece-wise continuous polynomial surfaces is demonstrated. The interpolated attributes include elevation, slope, aspect, and profile and planfo
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::51f67a9420ca4dd081c13ef1e7ff3b2f
https://doi.org/10.13031/2013.26132
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