1,720,980 research outputs found
NUTRIENT BALANCE AND GROUNDWATER QUALITY OF CONVENTIONAL, INTEGRATED AND ORGANIC FARMING SYSTEMS
No full textOutcomes from a long-term study on crop residue effects on plant yield and nitrogen use efficiency in contrasting soils
No full textStudio lisimetrico dell'effetto del regime irriguo e della fertilizzazione organica sulla lisciviazione dell'azoto nella regione Veneto
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Spatial variability, sampling intensity and soil organic carbon (SOC) assessment: a case study in organic and conventional fields
No full textA Multivariate Approach to Evaluate Reduced Tillage Systems and Cover Crop Sustainability
Full text linkThe evaluation of the effects of conservation agriculture during the transition from conventional tillage to no-tillage requires numerous indicators to be considered. For this purpose, we monitored changes in a multi-parameter dataset during a three-year experiment that combined three tillage intensities (conventional tillage—CT; minimum tillage—MT; and no tillage—NT) with three soil covering managements (tillage radish cover crop, winter wheat cover crop and bare soil). Using a multivariate analysis, we developed a Relative Sustainability Index (RSI) based on 11 physical (e.g., bulk density and penetration resistance), chemical (e.g., soil organic carbon and pH) and biological soil properties (e.g., earthworm density) to evaluate cropping systems sustainability. The RSI was most affected by tillage intensity showing higher RSI values (i.e., better performances) in reduced tillage systems. Specifically, the RSI under NT was 42% greater than that of CT and 13% greater than that of MT. Soil covering had little impact on the RSI. Among the tested parameters, the RSI was increased most by saturated hydraulic conductivity (+193%) and earthworm density (+339%) across CT and NT treatments. Our results suggest that conservation agriculture and, particularly, reduced tillage systems, have the potential to increase farm environmental and agronomic sustainability
Organic input quality is more important than its quantity: C turnover coefficients in different cropping systems
No full textGoing Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
POTENTIAL EFFECTS OF WATER REGIME AND ORGANIC FERTILIZATION ON NITROGEN LEACHING IN NE ITALY. A LYSIMETER STUDY.
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