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This article in AJ

  1. Vol. 85 No. 1, p. 10-12
     
    Received: Mar 13, 1991


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doi:10.2134/agronj1993.00021962008500010002x

Estimating Leaf Area of Pearl Millet from Linear Measurements

  1. N. Persaud ,
  2. M. Gandah,
  3. M. Ouattara and
  4. N. Mokete
  1. A gronomy Dep., Kansas State Univ., Manhattan, KS 66506-5501
    D ep. of Agricultural Research, Pvt. Bag 0033, Gaborone, Botswana

Abstract

Abstract

Plant leaf area is a useful observation in physiological and agronomic research. Statistical regression and correlation models have been used to estimate leaf blade area from leaf blade dimensions such as length and width. The objective of this study was to determine if consistent relationships exist among leaf area (A), length (l), and imum width (m) of pearl millet [ Pennisetum glaucum (L.) R. Br.] leaves from different plant positions and different stages of maturity. Measurements of length, width, and area were made on leaf blades sampled from different positions on pearl millet plants at the 7- and 10-leaf growth stages. Relationships for the model A = klm were derived by least squares regression for these leaves of each position on the plants (where k is an empirical constant). The results of these analyses justified the use of the model A = klm for pearl millet leaves. However, different coefficients may need to be calculated depending on leaf position and growth stage of the plants. This approach could also be applied for other cereal crops whose leaves have similar morphology and anatomy.

Research partially funded by USAID through the Niger Agricultural Sector Development Grant, through grant no. DAN 1254-G-SS-5065-00 the International Sorghum and Millet CRSP, and through grant no. DAN 1311-G-SS-6018-00 the Soil Management CRSP. This is contribution No. 91-416-J from the Kansas Exp. Stn.

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