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Journal of Plant Nutrition Volume 22, 1999 - Issue 2
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Original Articles

Estimating vegetation coverage in wheat using digital images

E. V. Lukina Department of Plant and Soil Sciences, Oklahoma State University, 162 AgHall, Stillwater, OK, 74078
,
M. L. Stone Department of Plant and Soil Sciences, Oklahoma State University, 162 AgHall, Stillwater, OK, 74078
&
W. R. Raun Department of Plant and Soil Sciences, Oklahoma State University, 162 AgHall, Stillwater, OK, 74078
Pages 341-350 | Published online: 21 Nov 2008

References

  • Heilman , J.L. and Kress , M.R. 1987 . Effect of vegetation on spectral irradiance at the soil surface . Agron. J. , 79 : 765 – 768 .
  • Huete , A.R. , Jackson , R.D. and Post , D.F. 1985 . Spectral response of a plant canopy with different soil backgrounds . Remote Sens. Environ. , 17 : 37 – 53 .
  • Kodak . 1995 . Digital Camera 40 , New York, NY : Eastman Kodak Company .
  • Large , E.C. 1954 . Growth stages in cereals . Plant Pathol. , 3 : 128 – 129 .
  • Lukina , E.V. , Raun , W.R. , Stone , M.L. , Solie , J.B. , Johnson , G.V. , Lees , H.L. , LaRuffa , J.M. and Phillips , S.B. 1997 . “ Effect of row spacing, N rate and growth stage on spectral radiance in winter wheat ” . In Oklahoma State University Soil Fertility Research Highlights , 251 – 258 . Stillwater, OK : Oklahoma State University .
  • Micrografx . 1997 . Picture Publisher® 7.0 , Richardson, TX : Micrografx, Inc. .
  • Raun , W.R. , Johnson , G.V. , Sembiring , H. , Lukina , E.V. , LaRuffa , J.M. , Thomason , W.E. , Phillips , S.B. , Solie , J.B. , Stone , M.L. and Whitney , R.W. 1998 . Indirect measures of plant nutrients . Commun. Soil Sci. Plant Anal. , 29 : 1571 – 1581 .
  • Stanhill , G. , Kafkafi , U. , Fuchs , M. and Kagan , Y. 1972 . The effect of fertilizer application on solar reflectance from a wheat crop . Israel J. Agric. Res. , 22 (2) : 109 – 118 .
  • Stone , M.L. , Solie , J.B. , Whitney , R.W. , Raun , W.R. and Lees , H.L. Sensor for detection of nitrogen in winter wheat. SAE Paper 961757 . Presented at the 1994 SAE Symposium on Off‐Highway Equipment . August 1996 , Indianapolis, IN. Warrendale, PA : SAE .
  • Stone , M.L. , Solie , J.B. , Raun , W.R. , Whitney , R.W. , Taylor , S.L. and Ringer , J.D. 1996b . Use of spectral radiance for correcting in‐season fertilizer nitrogen deficiencies in winter wheat . Trans. ASAE , 39 (5) : 1623 – 1631 .
  • Stone , M.L. , Raun , W.R. , Johnson , G.V. , Solie , J.B. , Whitney , R.W. , Sembiring , H. , LaRuffa , J.M. and Lukina , E.V. 1997 . Sensing nitrogen deficiencies in winter wheat and bermudagrass . Better Crops , 81 (4) : 15 – 16 .
  • Wanjura , D.F. and Hatfield , J.L. 1987 . Sensitivity of spectral vegetative indices to crop biomass . Trans. ASAE , 30 (3) : 811 – 816 .

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