background and objectives: production and use of fertilizers in common agriculture have been many environmental problems. while the application of organic fertilizers instead of chemical fertilizers have a important role in soil fertility, increase quality of production and safety of agricultural ecosystems. pumkin, is an important annual herbaceous plant belongs to the cucurbitaceae family due...

Fertilization plays an important role in crop growth and soil improvement. This study was conducted to determine the best fertilization system for wheat production. Experiments were arranged in a complete block design with three replications in two years. Main plots consisted of six methods of fertilization including (N1): farmyard manure; (N2): compost; (N3): chemical fertilizers; (N4): farmya...

The effect that application of nitrogen-phosphorus (NP) rates exerts on some parameters of nitrogen metabolism and on yield in aubergine plants (eggplant, Solanummelongena cv. Bonica) was studied. All plants were grown under controlled conditions in an experimental greenhouse. The treatments consisted of the combination of three rates of N in the form of KNO3 (N1: 15 g m-2, N2: 22.5 g m,-2 and ...

Sorghum is a Poaceae family plant that produces lot of hay. A field experiment was carried out at the University Thessaly’s experimental farm to investigate hay yield and quality characteristics six different sorghum varieties (V1: Buffalo grain, V2: Elite, V3: Big Kahuna, V4: 25K1009, V5: 4264, V6: 5D61) under nitrogen fertilization levels (N1: 0, N2: 80, N3: 160, N4: 240 kg ha−1, using urinar...

Abstract Biochar application to agriculture soil has been recommended as a strategy reduce increasing CO 2 emission in the atmosphere and mitigate climate change. In this study, we evaluated impact of two doses biochar (10 20 t.ha −1 ) applied 2014 reapplied 2018 combined with three fertilization levels (N0, N1, N2) on carbon dioxide emissions selected physical chemical properties field conditi...

this research has been done for studying the effect of split application of nitrogen fertilizer on growth indexes and yield of three hybrids of grain corn in shahrood. a split plot experiment based on randomized complete block design with four replications was carried out in 2007. three hybrids of corn (double cross 370, single cross 447, single cross 499) were placed in main plots and split ap...

There is a need to optimize water-nitrogen (N) applications to increase seed cotton yield and water use efficiency (WUE) under a mulch drip irrigation system. This study evaluated the effects of four water regimes [moderate drip irrigation from the third-leaf to the boll-opening stage (W1), deficit drip irrigation from the third-leaf to the flowering stage and sufficient drip irrigation thereaf...

to investigate the appropriate distribution of nitrogen fertilizer application and optimum amount of phosphorus fertilizer to achieve high quality and quantitative yield in edible and seed potato (solanum tuberosum l.) tubers, this experiment was conducted in research farm of the college of agriculture and natural resources, university of tehran in 2012. the experiment was performed a strip spl...

Abstract Biochar application into soil has potential as a means for reducing greenhouse gas emissions and climate mitigation strategy. In this study, we evaluated the impact of two doses biochar (10 20 t.ha −1 ) applied in 2014, combined with three fertilization levels (N0, N1, N2) on carbon dioxide (CO 2 field conditions during growing season (April – October) 2018. The site is located Nitra r...