Effect of Intra-Row Spacing and Potassium Fertilizer on Growth and Yield of Potato (Solanum tuberosum L.)

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Published Dec 27, 2025
https://doi.org/10.70436/nuijb.v4i02.398
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Vol. 4 No. 02 (2025): June

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Abdul Wasi Hanifi
Nangarhar University
Asmatullah Durani
Nangarhar University
Noor Ali Noor
Nangarhar University
Sajidullah Safi
Laghman University
Azizullah Khalili
Sayed Jamaluddin Afghani University

Abstract

This study investigated the effects of various plant spacings and potassium fertilizer on the growth and yield of potato (cv. Santa) in Nangarhar Province, Afghanistan during the summer of 2024.A factorial experiment was conducted at the research farm of the Agriculture Faculty, Nangarhar University. The experiment comprised 12 treatments with three levels of intra-row spacing (20, 25, and 30 cm) and four levels of potassium fertilizer (0, 100, 150, and 200 kg/ha). The experimental design utilized a randomized complete block design (RCBD) with three replicates. The results revealed that both plant spacing and potassium fertilizer significantly influenced growth and yield parameters. The closest spacing (20 cm) resulted in the highest values for plant height (58.55 cm), number of branches per plant (3.72) and  number of leaves per plant (50.68).The application of 150 kg/ha of potassium (F3) resulted in significant increases in plant height (59.53 cm), number of branches  per plant (4.12), and number of leaves per plant (54.21). The best interaction  between plant spacing and potassium was observed with treatment S1F3 (20 cm + 150 kg/ha), which yielded the highest values for plant height (63.50 cm) and number of leaves per plant (56.87). Yield parameters indicated that the closest spacing and potassium application of 150 kg/ha maximized tuber weight per plant (500.86 g) and total tuber yield per hectare (32.06 t). Economic analysis revealed that S1F3 achieved the highest gross (AF 700,407/ha) and net returns (AF 455,437.3/ha).This study recommends that farmers adopt a spacing of 20 cm between potato plants and apply 150 kg/ha of potassium fertilizer to optimize potato growth, yield, and profit.

Keywords

Potato, Intra, Row, Spacing, Potassium, Fertilization

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Author Biographies

Abdul Wasi Hanifi, Nangarhar University

Department of Agronomy, Faculty of Agriculture, Nangarhar University, Nangarhar, Afghanistan

Asmatullah Durani, Nangarhar University

Department of Agronomy, Faculty of Agriculture, Nangarhar University, Nangarhar, Afghanistan

Noor Ali Noor, Nangarhar University

Department of Economic and Agricultural Extension, Faculty of Agriculure, Nangarhar University, Nangarhar, Afghanistan

Sajidullah Safi, Laghman University

Department of Horticulture, Faculty of Agriculture , Laghman University, Laghman, Afghanistan

Azizullah Khalili, Sayed Jamaluddin Afghani University

Department of Agronomy Faculty of Agriculture , Sayed Jamaluddin Afghani University, Kunar, Afghanistan

How to Cite
Hanifi, A. W., Durani, A., Noor, N. A., Safi, S., & Khalili, A. (2025). Effect of Intra-Row Spacing and Potassium Fertilizer on Growth and Yield of Potato (Solanum tuberosum L.). Nangarhar University International Journal of Biosciences, 4(02), 35–42. https://doi.org/10.70436/nuijb.v4i02.398

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