Indian Journal of Weed Science
Year : 2005, Volume : 37, Issue : 3&4
First page : ( 228) Last page : ( 230)
Print ISSN : 0253-8040.

Influence of Weed Control and Fertility Levels on the Productivity of Seed Potato Under Lahaul Valley Conditions of Himachal Pradesh

Rana M. C., Rana S. S., Singh Man

CSK HPKV Highland Agricultural Research and Extension Centre, Kukumseri, Lahaul (H. P.), India.

Abstract

A field experiment comprising 12 treatment combinations of four weed control methods (atrazine at 1.0 kg ha⁻¹, isoproturon at 1.25 kg ha⁻¹, pendimethalin at 1.2 kg ha⁻¹ and farmer's practice) and three fertility levels (N₅₀P₅₀K₂₅. N₇₅P₇₅K₃₇₅ and N₁₀₀P₁₀₀K₅₀) was conducted at Kukumseri during four consecutive summers of 2000, 2001, 2002 and 2003. Pendimethalin at 1.2 kg ha⁻¹ was very effective against Digitaria sanguinalis. While atrazine at 1.0 kg ha⁻¹ gave lowest count of Amaranth sp. Atrazine recorded lowest total weed dry matter and significantly higher tubers plant⁻¹, tuber yield (32.5 t ha⁻¹), net return (Rs. 93232 ha⁻¹) and B: C ratio (2.53). Pendimethalin and isoproturon were equally good in influencing seed potato yield. Increase in fertility level increased number of tubers, tuber weight plant⁻¹ and tuber yield significantly. 100 kg N, 100 kg P₂O₅ and 50 kg K₂O resulted in 18.6% higher yield and thereby tended to fetch Rs. 18564 more net returns ha_-1 as compared to 50 kg N, 50 kg P₂O₅ and 25 kg K₂O ha_-1.

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