INFLUNCE OF CULTIVARS, PLANT GEOMETRY, HUMIC ACID AND THEIR INTERACTIONS ON GROWTH AND YIELD OF NIGER (Guizotia abyssinicia Cass.) CROP

Abstract

     A field experiment was undertaken during the spring growing season of 2020 at the experimental farm Qalamurtga- Erbil with GPS reading of (Latitude 36^o 20ʹ 53.81" N, altitude 44^o06ʹ 20.76 ") to study the effect of three Niger cultivars (Bengalnuglue, Karal and Animax), two plant density (45 and 60cm) between rows and three levels of humic acid (0 ,350 and 700) mg L^-1 on Niger (Guizotia abyssinicia Cass.) growth, yield and its component and yield using factorial RCBD with three replicates. The results indicated to recording the highest seed yield values (547.46 ,549.04 and 664.74) kg ha^-1 for Animax cultivar, 45cm distance between rows and spraying of 700mg L^-1 humic acid respectively. The combination between Animax cultivar – 45cm distance between rows -700mg L^-1 humic acid (C₃ × G₁ × HA₂) recorded the highest value for seed yield kg ha^-1 which was (759.06) kg ha^-1.

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