Canopy chlorophyll density (Chl) has a pivotal role in diagnosing crop growth and nutrition status. The purpose of this study was to develop Chl based models for estimating N status and predicting grain yield of rice (Oryza sativa L.) with Leaf area index (LAI) and Chlorophyll concentration of the upper leaves. Six field experiments were conducted in Jiangsu Province of East China during 2007, ...

Cadmium, a widespread toxic heavy metal in farmland soils, is harmful to human health. A field experiment was conducted investigate the effects of biochar and biochar-based fertilizers on soil pH, organic matter, available Cd, as well rice Cd uptake translocation. The results showed that biomass significantly increased after both application high rate at tillering stage. plant height were impro...

Irrigation water is limiting for crop production in arid and semi-arid areas. Furthermore, excess nitrogen (N) application is a source of groundwater contamination. Partial root drying irrigation (PRD) can be used as water saving technique and a controlling measure of groundwater N contamination. The objectives of this investigation were to evaluate the effect of ordinary furrow irrigation (OFI...

plant growth promoting rhizobacteria (pgpr) has been identified as an alternative to chemical fertilizer to increase soil fertility and crop production in sustainable agriculture. the objective of this study was to investigate the effects of single and co-inoculation of azospirillum and pseudomonas strains on plant growth and nutrient uptake of maize as a factorial experiment. treatments includ...

Crop growth simulation models provide a means to quantify the effects of climate, soil, and management on crop growth and biogeochemical processes in soil. The Denitrification and Decomposition (DNDC) model was evaluated for its ability to simulate N dynamics and balance in the rice (Oryza sativa L.)–wheat (Triticum aestivum L.) cropping systems in the Indo-Gangetic Plains with various N and wa...

Aluminum (Al) toxicity is a major abiotic constraint for agricultural production in acidic soils that needs sustainable solution to deal with plant tolerance. Silicon (Si) plays important roles alleviating the harmful effects of Al plants. The genus Urochloa includes most grasses and hybrids, it currently used as pastures tropical regions. Xaraés palisadegrass (Urochloa brizantha cv. Xaraés) fo...

Rice yield can be increased in many ways such as developing new high yielding varieties or adopting proper agronomic management to the existing varieties. Proper fertilization is an important management practice to increase rice yield. Proper fertilization can markedly increase the yield and improve the quality of rice [1]. Nitrogenous fertilizer has immense effect on rice yield throughout the ...

A Split plot experiment based on randomized complete block design (RCBD) with three replications was conducted in 2012,Treatments were included the time of foliar application with 3 levels (tillering stage, heading stage and no spray (control)) as main factor and cultivars in 4 levels (Sardari, Rijav, Biseton and Rashid) as the second factor. Plant characteristics such as plant height, length o...

Nitrogen (N) in plants is generally diagnosed by a soil test and plant tissue analysis.However, such analyses are costly in terms of time and money and are not easily accessible byresearchers and extension workers, let alone farmers. Alternative cost-effective methods arerequired for rapid analysis of the N status of crops and to guide N management in wheat. Theobjective of this study was to as...