African Journal of
Agricultural Research

  • Abbreviation: Afr. J. Agric. Res.
  • Language: English
  • ISSN: 1991-637X
  • DOI: 10.5897/AJAR
  • Start Year: 2006
  • Published Articles: 6363

Full Length Research Paper

Appropriate fertilizer (NPK) rates for cassava (Manihot esculenta Crantz) production in the humid forest agro-ecological zone of Cameroon

TEMEGNE NONO Carine
  • TEMEGNE NONO Carine
  • Department of Plant Biology, Faculty of Science, University of Yaounde I, P. O. Box 812 Yaounde, Cameroon.
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NGOME AJEBESONE Francis
  • NGOME AJEBESONE Francis
  • Institute of Agricultural Research for Development (IRAD), P. O. Box 2123 Yaounde, Cameroon.
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ETHE NGALLE
  • ETHE NGALLE
  • Institute of Agricultural Research for Development (IRAD), P. O. Box 2123 Yaounde, Cameroon.
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  •  Received: 17 May 2019
  •  Accepted: 28 August 2019
  •  Published: 31 December 2019

Abstract

The objective of this study was to test for appropriate quantity of fertilizer (NPK 12-11-18) required to boost the production of cassava (variety TME 419) in the forest zone of Cameroon. The trial was conducted at the experimental farm of the Institute of Agricultural Research for Development (IRAD) in Mbalmayo. The experimental design was completely randomized block design in three replicates. The treatments were as follows: T0 (Control (No input)); T1 (200 kg.ha-1); T2 (300 kg.ha-1); and T3 (400 kgha-1). The data were analyzed using the IBM SPSS Statistics 20 Software. The results showed that chemical fertilizer improves the growth (number of leaves, plant height, and petiole length) and yield (number of marketable root, yield) of cassava mainly because it enhances soil nutrient availability. Thus, NPK-fertilizer significantly (p<0.001) increased petiole length by 20.71, 27.83, and 31.62% for T1, T2, and T3, respectively at 5 months after planting (MAP). The highest plant height and number of leaves at 4 and 5 MAP was observed with T3 followed by T2 and T1. Similarly, the highest root yield (43.33±10.97 t.ha-1) was observed with treatment T3. Hence, the fertilizer application rate of 400 kgha-1 of NPK 12-11-18 appears most appropriate for intensification of cassava production in the humid forest agro ecological zone of Cameroon.

Key words: Cassava, growth, NPK, root yield, soil fertility.