Effects of Humic Acid and Crop Residues on Soil and Wheat Nitrogen Contents

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.

Effect of Crop Sequences, Crop Residues, Sulfur Application and N-Fertilizer on Wheat Crop Grown on Sandy Calcareous Soils

“…This probably happened due to the increase in residue decomposition, organic NP mineralization and the availability of NP for plant use. This finding is agreed with Akhtar et al, 2014. s Sequence 1 = continuous sequence of cereal crops (wheat and maize), Sequence 2 = three seasons cereal crops followed by one season legume crop (clover), Sequence 3 = two seasons cereal crops, followed by two seasons legume crops (clover and peanut), Sequence 4 = one season cereal crop (wheat) followed by three seasons legume crops.…”

“…Wheat is an exhaustive crop, which not only depletes soil fertility but also degrades soil physical properties (Akhtar et al, 2014). In Egypt the cultivated wheat area was 3.33 million fed with total production of 8.7 million tons with average yield of 2613 kg fed −1 during 2013-2014 (Hamza and Beillard, 2014).…”

Anatomizing the Dynamics of Societal Behaviour towards E-waste Management and Recycling Initiatives: A Case Study of Kolkata, India

“…Majority of the questions are self-designed, with certain segments being derived from the studies undertaken by Akhtar et al (2014) and Ercan and Bilen (2014) in Malaysia and Turkey, respectively. The questions, however, have been modified to suit the context of Kolkata, as well as other major cities in India.…”

Interactions between humic substances and organic amendments affecting soil biological properties and growth ofZea maysL. in the arid land region

“…green manures, farmyard manures, humic acid and crop residues) into the soil to increase the organic matter (OM) status (Metzger and Yaron 1987). There are considerable amounts of animal manures available for this purpose and these residues range in composition with 15-60% hemicellulose, 10-30% water cellulose, soluble fraction (5-30%), alcohol-soluble fractions (fats, oil, waxes, resins and pigments) and protein (Akhtar et al 2014). The application of organic residues and sheep manure to soil increases microbial biomass, aggregate stability, soil microbial activity (Arocena et al 2012;Al-Maliki 2012;AL-Maliki et al 2017).…”