TITLE:
Effects of Humic Acid and Crop Residues on Soil and Wheat Nitrogen Contents
AUTHORS:
Kashif Akhtar, Syed Noor Muhammad Shah, Amjad Ali, Sajjad Zaheer, Fazli Wahid, Ahmad Khan, Mohib Shah, Shahida Bibi, Abdul Majid
KEYWORDS:
Anthesis; Grain; Maturity; Soil Fertility; Straw; Mung Bean
JOURNAL NAME:
American Journal of Plant Sciences,
Vol.5 No.9,
April
11,
2014
ABSTRACT: This study was conducted with the aim of finding humic acid and crop
residues effects on soil and wheat nitrogen at New Development Farm, University of Agriculture, Peshawar,
Pakistan during winter 2009-2010. The experiment was laid out in RCB design
having four replications. Different levels (1, 1.5, 2 and 2.5 kg ha-1)
of Humic acid were applied at sowing time. Mungbean (5 tons ha-1),
wheat straw (10 tons ha-1) and mungbean (2.5 tons ha-1) +
wheat straw (5 tons ha-1) were incorporated 30 days before sowing.
Our results showed higher mineral and total nitrogen (7.32 and 0.43,
respectively) mg kg-1 in soil and also higher nitrogen in stem,
leaves and grains (2.3, 4.6 and 21.1, respectively) mg kg-1 at
maturity in those plots in which 2.5 kg ha-1 of humic acid was applied.
Higher mineral and total nitrogen (7.04 and 0.5, respectively) mg kg-1 in soil and also higher nitrogen in leaves (5.5) mg kg-1 at
pre-anthesis, while at maturity stage in stem, leaves and grain (5.5, 2.1, 4.2
and 20.8) g kg-1 was recorded in those plots in which 5 tons ha-1 mung bean was incorporated. Our experimental results suggest the use of 5 tons
ha-1 of mungbean residues with 2.5 kg ha-1 of humic acid
to improve soil fertility availability of more nitrogen in wheat plants to increase
the crop yield and grains quality.