Results 91 to 100 of about 17,171 (232)

Balance of potassium in two long-term field experiments with different fertilization treatments

open access: yesPlant, Soil and Environment, 2019
Balance of potassium (K) was observed in long-term stationary field experiments (21 years) at two sites with different soil and climatic conditions (Luvisol, Cambisol).
Jiří Balík   +4 more
doaj   +1 more source

Modeling carbon biogeochemistry in agricultural soils [PDF]

open access: yes, 1994
An existing model of C and N dynamics in soils was supplemented with a plant growth submodel and cropping practice routines (fertilization, irrigation, tillage, crop rotation, and manure amendments) to study the biogeochemistry of soil carbon in arable ...
Frolking, Steve   +2 more
core   +2 more sources

Physical properties of soil after 54 years of long-term fertilization and crop rotation

open access: yesPlant, Soil and Environment, 2016
The investigations were carried out in two permanent fertilization experiments established in 1955 on the black earth in Chylice, near Warsaw, Mazovian province, Poland. The aim of this study was to compare the impact of long-term mineral (NPK); organic (
I. Suwara   +3 more
doaj   +1 more source

Should organic farmers be rewarded for sequestering C in soil? [PDF]

open access: yes, 2008
The question of whether farmers, and organic farmers in particular, should be rewarded for sequestering C in soils is controversial. A review of the literature on long term experiments comparing organic and conventional systems, demonstrates that soils ...
Cooper, Julia M., Melchett, Peter
core  

Effects of long-term farmyard manure applications on soil organic matter, nitrogen mineralization and crop yield – a modeling study – [PDF]

open access: yes, 2007
To develop sustainable cropping systems we need to predict both short-term and long-term effects of management practices on soil fertility. For this purpose agro-ecosystem simulation models are valuable tools.
Dux, J., Fink, M.
core  

Effect of organic and inorganic supply on Al detoxification and sorghum crop yield in ferralitic soils from Burundi [PDF]

open access: yesTropicultura, 1992
A methodology has been tested to evaluate the agronomic effectiveness of organic fertilizers in combination or not with chemical fertilizers and lime on a ferralitic soil in Burundi.
Van den Berghe, C.   +2 more
doaj  

Dry anaerobic digestion of organic residues on-farm - a feasibility study [PDF]

open access: yes, 2006
Objectives The feasibility study shall answer the following questions: Are there economical and ecological advantages of on-farm dry digestion biogas plants?
Lehto, Marja   +2 more
core  

Economic analysis of organic greenhouse lettuce production in Turkey. [PDF]

open access: yes, 2006
Health issues and environmental concerns have drawn the attention to organic agriculture aiming to protect the natural balance and to produce without damaging the environment. This study aims determining economic feasibility of organic greenhouse lettuce
Engindeniz, Sait, Tuzel, Yuksel
core   +3 more sources

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