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Volume 8 - April 1972

Contents

Page 3 of 4

Research Article

  • Studies on White Yam (Dioscorea rotundata) III. Foliar Analysis for Nitrogen Nutrition

  • R. A. Sobulo
  • Published online by Cambridge University Press:
    03 October 2008, pp. 271-279

  • The concentrations of total nitrogen and nitrate–nitrogen in yam leaves receiving various levels of nitrogen were determined fortnightly. Nitrate–nitrogen was superior to total nitrogen as an index of nitrogen nutrition. Correlation coefficients between nitrate–nitrogen at various sampling dates and rate of nitrogen application were highest between late June and early July in two seasons, indicating that this is the best time to take single samples for foliar analysis. A relation was demonstrated between nitrate–nitrogen at this period and tuber yield.

  • White Stripe Disorder of Oil Palm (Elaeis guineensis) in Malaysia

  • J. A. Rajaratnam
  • Published online by Cambridge University Press:
    03 October 2008, pp. 161-169

  • Oil palms with white stripe have greatly reduced yields. In the chlorotic areas of the leaflets, columnar palisade cells fail to develop and there is a reduction in air-space volume of the spongy mesophyll. Leaf area and photosynthetic activity are also reduced. Recovery of palms showing symptoms was spasmodic. The condition is discussed in relation to boron, to N/K ratio, polyphenols and availability of photosynthate.

Book Reviews

Research Article

  • Studies of the Drip Method of Irrigation

  • I. P. Abrol, S. P. Dixit
  • Published online by Cambridge University Press:
    03 October 2008, pp. 171-175

  • A comparison has been made of drip and conventional check basin methods of irrigation, using onions and ladies finger as test crops. Significant increases in yield and water use efficiency in drip irrigated over conventionally irrigated plots resulted from increased availability of soil moisture at low tensions and reduced surface evaporation losses. Reduced soil strength in drip irrigated plots was also a factor resulting in increased yield of onions.

Book Reviews

Front matter

  • EAG volume 8 issue 3 Cover and Front matter

  • Published online by Cambridge University Press:
    03 October 2008, pp. f1-f2
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Book Reviews

Index

Book Reviews

Front matter

  • EAG volume 8 issue 4 Cover and Front matter

  • Published online by Cambridge University Press:
    03 October 2008, pp. f1-f5
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Back matter

  • EAG volume 8 issue 3 Cover and Back matter

  • Published online by Cambridge University Press:
    03 October 2008, pp. b1-b3
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Front matter

  • EAG volume 8 issue 1 Cover and Front matter

  • Published online by Cambridge University Press:
    03 October 2008, pp. f1-f4
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Page 3 of 4