نتایج جستجو برای: tillage 2365 kg ha

تعداد نتایج: 244611  

2013

Smallholder farmers in southern Africa have reported on increased labour requirements for hoe weeding due to high weed infestations in conservation farming (CF) fields. However, CF proponents claim that weed pressure and labour requirements for weeding decrease within the first three years under the recommended CF practices. An observational study was carried out during the 2008/09 cropping sea...

Journal: :Applied sciences 2023

In Morocco, cereal production is below the expected potential. The adoption of best agricultural practices that reduce vulnerability to climate a major requirement. No-tillage (NT) agriculture system could improve by enhancing soil fertility. Some factors, in combination with no-tillage, can further yields, especially choice variety adequate fertilization. objective our study investigate effect...

امین غفوری, افسانه, خرم دل, سرور, شباهنگ, جواد,

In order to evaluate life cycle assessment (LCA) for rice agroecosystems based on mean of nitrogen fertilizer levels (less than 190, 190-200, 200-210, 210-220 and more than 220 kg N ha) during 1999-2012, an experiment was conducted. Four steps includung goal definition and scoping, inventory analysis, life cycle impact assessment and integration and interpretation were computed. Functional unit...

2017
James F. Power Paul Koerner John W. Doran Wallace Wilhelm

Returning crop residue improves water conservation and storage, nutrient availability, and crop yields. We have little knowledge, however, of the residual impacts of crop residues on soil and crop production. We hypothesized that residual impacts of crop residues vary with the amount of residues used. A 10-yr study near Lincoln, NE, evaluated the residual effects of an earlier 8-yr study of var...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه زابل - دانشکده کشاورزی 1393

گسترش استفاده از منابع آب شوردر مناطق گرم و خشک، لزوم تعیین روش مناسب کاربرد این منابع در بخش کشاورزی به منظور دست یابی به امنیت غذایی و کشاورزی پایدار را مشهود می سازد. لذا در این مطالعه، در قالب یک طرح بلوک کامل تصادفی در سطح مزرعه، تأثیر چهار شیوه آبیاری با آب شور شامل فاروی ثابت با آب شیرین (ff) و شور (ss)، فاروی یک در میان ثابت با آب شور و شیرین (ffs) و فاروی یک درمیان متغیر با آب شور و شی...

2017
R. B. Mendoza John W. Doran Thomas O. Powers C. W. Zanner T. G. Franti J. W. Doran T. O. Powers

Soil quality indicators and nematode abundance were characterized in a loessial soil under long-term conservation tillage to evaluate the effects of no-till, double-disk, chisel, and moldboard plow treatments. Indicators included soil electrical conductivity (EC), soil texture, soil organic matter (SOM), and total particulate organic matter (tPOM). Nematode abundance was positively correlated w...

2005
E. G. Gregorich P. Rochette

Agricultural soils can constitute either a net source or sink of the three principal greenhouse gases, carbon dioxide (CO2), nitrous oxide (N2O), and methane (CH4). We compiled the most up-to-date information available on the contribution of agricultural soils to atmospheric levels of these gases and evaluated the mitigation potential of various management practices in eastern Canada and northe...

Journal: :Spanish Journal of Agricultural Research 2021

Aim of study: The production efficiency crop rotations was evaluated based on the yield main (cereal grains and pea seeds) by-product (straw) converted per cereal units (CU), total protein yield.
 Area South-eastern Poland, Europe (2017-2019).
 Material methods: first order experimental factor included rotations: A): peas–durum wheat–spring barley; B): spring wheat–durum barley +oats;...

Journal: :Ecological applications : a publication of the Ecological Society of America 2010
Steven De Gryze Adam Wolf Stephen R Kaffka Jeff Mitchell Dennis E Rolston Steven R Temple Juhwan Lee Johan Six

Despite the importance of agriculture in California's Central Valley, the potential of alternative management practices to reduce soil greenhouse gas (GHG) emissions has been poorly studied in California. This study aims at (1) calibrating and validating DAYCENT, an ecosystem model, for conventional and alternative cropping systems in California's Central Valley, (2) estimating CO2, N2O, and CH...

ژورنال: علوم آب و خاک 2018

Evaluation of the ecological sustainability of different cropping systems is crucial to achieve sustainable agriculture. This evaluation is accessible via soil quality assessment. Therefore, to study the mid-term effects of different conservation tillage systems (no tillage and minimum tillage) and cover cropping on the biological indicators of soil quality, a factorial experiment in a complete...

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