Results 61 to 70 of about 950,917 (198)

Coupling Effects of Organic Fertilizer Substituting Chemical Fertilizer on Potato Yield, Quality and Soil Nitrogen Content in the Erhai Lake Basin of China

open access: yesAgronomy
Rational fertilization boosts crop yields and enhances nutritional value, but over-fertilization is counterproductive. Furthermore, water eutrophication caused by excessive use of nitrogen fertilizers has become a major agricultural non-point source ...
Xuemei Sun   +8 more
doaj   +1 more source

Effect of Fertilizers Containing Nitrogen on Yield and Mucilage of Isabgol (Plantago ovata L.) in Irrigation and Cutting off Irrigation [PDF]

open access: yesIkufīziyuluzhī-i Giyāhān-i Zirā̒ī, 2018
This experiment carried out during 2010-11 and 2011-12 cropping years to study the effect of variant levels of fertilizers containing nitrogen, normal irrigation and irrigation hindering on some agronomical characteristics of isabgol, in Smaeel-Abad ...
Amir Toghraei   +4 more
doaj  

Puddling against dry plowing for lowland rice culture in Surinam : effect on soil and plant, and interactions with irrigation and nitrogen dressing [PDF]

open access: yes, 1974
The influence of tillage on rice grown on heavy Surinam clay soils was investigated in pot and field trials. Included were interactions with seed rate, nitrogen dressing and distribution, water management, and variety.
Scheltema, W.
core  

Investigations on soil nitrogen I The influence of nitrogen fertilizers and rainfall on soil nitrate concentrations

open access: yes, 1957
Changes in the concentration of nitrate in soils taken during field experiments on cereals were followed for two months in Spring, 1955. At centres where nitrogen fertilizer increased yields of wheat and barley, soil nitrate at planting did not exceed 7 ...
Cooke, G. W.   +2 more
core   +1 more source

The Dynamics of Nitrous Oxide Emission from the Use of Mineral Fertilizers in Russia

open access: yesThe Scientific World Journal, 2001
The intensity of nitrous oxide (N2O) emission was considered based on literature data on the single input of mineral N (nitrogen) fertilizers into different agricultural soil types in Russia.
A AA. Romanovskaya   +4 more
doaj   +1 more source

Exploring the Impact of Nitrogen Smart Fertilizers on Potato Crop Performance.

open access: yes, 2023
reservedI fertilizzanti sintetici hanno svolto un ruolo fondamentale nella "rivoluzione verde" della metà del XX secolo, aumentando in modo significativo la resa delle colture.
VERNAZA CARTAGENA, WENDY CAROLINA
core  

Nitrogen and sulfur deposition on regional and global scales : a multimodel evaluation [PDF]

open access: yes, 2006
[1] We use 23 atmospheric chemistry transport models to calculate current and future (2030) deposition of reactive nitrogen (NOy, NHx) and sulfate (SOx) to land and ocean surfaces.
Galloway, J.   +139 more
core   +1 more source

Soil biological quality of grassland fertilized with adjusted cattle manure slurries in comparison with organic and inorganic fertilizers [PDF]

open access: yes, 2009
We studied the effect of five fertilizers (including two adjusted manure slurries) and an untreated control on soil biota and explored the effect on the ecosystem services they provided.
Bloem, J.   +7 more
core   +1 more source

Impactul diferitor sisteme de fertilizare asupra conţinutului azotului total, proteic şi neproteic al plantelor cultivate în asolament pe cernoziom tipic

open access: yesAgricultural Science, 2013
The aim of our researches was to compare the impact of two fertilization systems on the concentration of total, protein and nonprotein nitrogen in plants.
BÎZGAN Iana
doaj  

Studies on inorganic nitrogen fertilizers for tobacco [PDF]

open access: yes, 1973
Responses of flue-cured tobacco were examined in relation to different sources of inorganic nitrogen fertilizer. In a preliminary pot trial seven sources of nitrogen were compared, and in two subsequent field trials varying proportions of nitrate and ...
Warrell, L.A.   +4 more
core   +4 more sources

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