Abuja Journal of Agriculture and Environment (AJAE)

PERFORMANCE OF THREE GROUNDNUT (Arachis hypogaea L) VARIETIES AS INFLUENCED BY WEED CONTROL METHODS AND TIME OF PHOSPHOROUS APPLICATION IN NORTHERN GUINEA SAVANNA.
Author(s): D. M. Jibrin, U.L. Arunah, D.I. Adekpe, H.A Ajeigbe and A. A.Yusuf
Volume/Issue: Volume 1 , Issue 1 (2021)

ABSTRACT:

Field trials were conducted in 2018 and 2019 wet seasons at the Teaching and Research farms of Samaru College of Agriculture, Ahmadu Bello University, Zaria Kaduna State. The treatments consisted of three groundnut varieties (SAMNUT-22, SAMNUT-23 and SAMNUT-24), five weed control treatments (weedy check, black polythene mulch, pre-emergence herbicide follow by (fb) Post- emergence herbicide (Pendimenthalin at 1.5 kg a.i ha-1 + fluazifop-P- butyl at 1.0 kg a.i 1.5 kg a.i ha-1), manual hoe weeding at 3 and 6 WAS and intra row spacing at 10cm) and two different timing of phosphorous fertilizer application (2 weeks before sowing and at sowing).The treatments were laid in a split plot design with factorial combinations of weed control strategies and time of phosphorous application occupying the main plot while groundnut varieties occupied the sub- plots. The treatments were replicated three time. The results from the study revealed that SAMNUT-24 recorded the least weed dry weight and responded better to weed control efficiency than SAMNUT-22 and SAMNUT-23 respectively. Similarly, SAMNUT-24 recorded higher values for plant height and canopy spread. In terms of weed control methods, groundnut mulched with black polythene recorded highest values for canopy spread and plant height. Time of phosphorous application did not affect plant height. It can be concluded that SAMNUT-24 groundnut variety is superior in terms of vegetative growth and pod yield. Black polythene mulch or hoe weeding at 3 and 6 WAS controls weed effectively. Applying P at different timing had no significant impact on groundnut at Samaru.

KEYWORDS:

Varieties, Weed control, Growth and Time of P application.