scholarly journals A comprehensive assessment of the correlations between field crop yields and commonly used MODIS products

2016 ◽  
Vol 52 ◽  
pp. 65-81 ◽  
Author(s):  
David M. Johnson
Keyword(s):  
Crop Yields ◽  
Comprehensive Assessment ◽  
Field Crop

scholarly journals Effect of livestock production on the economic efficiency of irrigation systems

2006 ◽  
Vol 51 (2) ◽  
pp. 177-187 ◽  
Author(s):  
Petar Gogic
Keyword(s):  
Economic Efficiency ◽  
Crop Production ◽  
Net Present Value ◽  
Crop Yields ◽  
Irrigation System ◽  
Livestock Production ◽  
Economic Effects ◽  
Field Crop ◽  
System Utilization ◽  
Price Relationship

The aim of the study was to examine the effect of livestock production on the economic efficiency of investments in irrigation projects. The study was based on a model focused on field crop/livestock production using the data of crop yields in field crop production with or without irrigation, financial results of cattle fattening and milk production and the input and output price relationship. The influence of livestock production on the economic effects of irrigation system utilization was evaluated using the indices of economic efficiency of investments - internal rate of return, net present value and pay-back period. The data on the amount of investments required for the construction of the irrigation system, economic benefit achieved by optimizing production under both irrigated and non-irrigated conditions, with and without livestock production were used to determine these indices.

Arbuscular mycorrhizal fungi in field crop production: Potential and new direction

2006 ◽  
Vol 86 (4) ◽  
pp. 941-950 ◽  
Author(s):  
Chantal Hamel ◽  
Désiré-Georges Strullu
Keyword(s):  
Arbuscular Mycorrhizal Fungi ◽  
Mycorrhizal Fungi ◽  
Crop Production ◽  
Crop Yields ◽  
Plant Root ◽  
Arbuscular Mycorrhizal ◽  
Soil Microbiology ◽  
Signal Molecules ◽  
Field Crop ◽  
Soil System

Arbuscular mycorrhizal fungi (AMF) are multipurpose organisms with complex ecological ramifications in the soil system that have been difficult to study and understand. The phytocentric concept of AMF that has prevailed since the naming of these organisms is being replaced by a holistic vision recognizing that AMF are a key element of soil functioning and health rather than a plant root component. Recent advances in knowledge brought about by new techniques for soil microbiology research open the way to AMF management in crop production. Arbuscular mycorrhizal fungi may influence crop development, even in phosphorus-rich soils. However, growing crops in soil with lower fertility would optimize the expression of the multiple beneficial effects of AMF in agro-ecosystem and reduce nutrient seepage to the environment. The consideration of the soil mycorrhizal potential within the framework of soil testing and fertilization recommendations, the development of improved inoculants and signal molecules to manipulate AMF and the development of cultivars with improved symbiotic qualities would insure the production of good crop yields while improving agroecosystems’ sustainability. Key words: Arbuscular mycorrhizal fungi management, field crop production, agriculture, soil quality, arbuscular mycorrhizal effect

scholarly journals Water footprint of protein yield of field crop species based on evapotranspiration patterns

2019 ◽  
Vol 7 (1-2) ◽  
pp. 11-15
Author(s):  
Márton Jolánkai ◽  
Katalin M. Kassai ◽  
Adna Eser ◽  
Laura Kempf ◽  
Ákos Tarnawa
Keyword(s):  
Sugar Beet ◽  
Crop Yields ◽  
Water Footprint ◽  
High Variability ◽  
Protein Yield ◽  
Field Crop ◽  
Plant Growth And Development ◽  
Crop Species ◽  
Physiological Factors ◽  
Assessment Study

Water availability is one of the major physiological factors influencing plant growth and development.  An assessment study has been done at the Szent István University, Gödöllő to evaluate and identify the water footprint of protein yield of field crop species. Six field crop species (sugar beet Beta vulgaris, winter barley Hordeum vulgare, winter wheat Triticum aestivum, maize Zea mays, potato Solanum tuberosum, and alfalfa Medicago sativa) were involved in the study. Evapotranspiration patterns of the crops studied have been identified and physiologically reliable protein ranges within crop yields were evaluated. The results obtained suggest, that water footprint of cereals proved to be the lowest, however maize values were highly affected by the high variability of protein yield. Alfalfa, potato and sugar beet water footprints were in accordance with their evapotranspiration patterns.  

RECOVERY OF PRODUCTIVITY OF ONTARIO SOILS DISTURBED BY AN OIL PIPELINE INSTALLATION

1982 ◽  
Vol 62 (2) ◽  
pp. 267-279 ◽  
Author(s):  
J. L. B. CULLEY ◽  
B. K. DOW ◽  
E. W. PRESANT ◽  
A. J. MacLEAN
Keyword(s):  
Organic Matter ◽  
Crop Yields ◽  
Chemical Properties ◽  
First Year ◽  
Field Crop ◽  
Oil Pipeline ◽  
Soil Mixing ◽  
Right Of Way ◽  
Physical Chemical ◽  
The Right

Measurement of soil properties and field-crop yields on cropland traversed by the Sarnia-Montreal oil pipeline indicated that pipeline isntallation detrimentally affected both crop yields and soil physical-chemical properties in the first year after construction. After 5 yr, relative yields improved although reductions still persisted at most row-cropped sites. However, alfalfa yields at two sites appeared to be unaffected by pipeline construction. Soil mixing and compaction on the right-of-way were most prevalent on medium- to fine-textured soils. Compaction did not appear to be a problem at a coarse-textured site. Soil chemical data indicated that spoil (subsoil) materials from the trench were spread across the right-of-way at most sites. Diluted soil organic matter levels in the right-of-way adversely affected nitrogen status. Medium- to fine-textured right-of-way soils had reduced porosities and hydraulic conductivities, but increased strengths compared with undisturbed adjacent soils.

Évaluation à moyen terme des besoins en engrais minéraux (N, P, K) d'une rotation en grandes cultures sur sol argileux

2011 ◽  
Vol 91 (4) ◽  
pp. 637-646 ◽  
Author(s):  
G. J. Tremblay ◽  
J. Boisvert ◽  
G. É. Fréchette ◽  
M. Saulnier ◽  
R. Alexandre ◽  
...  
Keyword(s):  
Clay Soil ◽  
Crop Yields ◽  
Mineral Fertilizer ◽  
Triticum Aestivum L ◽  
Field Crop ◽  
Soil P ◽  
Field Crops ◽  
Term Evaluation ◽  
Four Levels ◽  
Phosphorus And Potassium

Tremblay, G. J., Boisvert, J., Fréchette, G. É., Saulnier, M., Alexandre, R. and Vanasse, A. 2011. Mid term evaluation of mineral fertilizer requirements (N, P, K) of a field crop rotation on a clay soil. Can. J. Soil Sci. 91: 637–646. In Quebec, the recommended fertilizer requirements have been lowered since 1994. A study was undertaken from 1998 to 2005 in a 4-yr rotation of wheat (Triticum aestivum L.), soybean [Glycine max (L.) Merr.] and grain corn (Zea mays L.) to verify the mid-term mineral fertilizer requirements (N, P, K) for these field crops. Four levels of nitrogen (N) and three levels of phosphorus (P) and potassium (K) were compared on a clay soil of the Saint-Lawrence Lowlands. Nitrogen requirements based on this study corresponded to the recommended levels of each field crop tested. Recommended phosphorus rates did not maintain initial PM-III soil level (1998). However, crop yields were not affected by this decrease in soil PM-III level. To improve fertilizer recommendation tables, it should be relevant to determine with more accuracy the critical phosphorus and potassium values for field crops on other typical Quebec soils.

Crop yields over the first nine years of LTRAS, a long-term comparison of field crop systems in a Mediterranean climate

2004 ◽  
Vol 86 (2-3) ◽  
pp. 267-277 ◽  
Author(s):  
R.Ford Denison ◽  
Dennis C Bryant ◽  
Thomas E Kearney
Keyword(s):  
Mediterranean Climate ◽  
Crop Yields ◽  
Field Crop

scholarly journals Water footprint of yield protein content of twelve field crop species on a Hungarian crop site

2019 ◽  
Vol 68 (Supplement) ◽  
pp. 53-60
Author(s):  
Adnan Eser ◽  
Hajnalka Kató ◽  
Laura Kempf ◽  
Márton Jolánkai
Keyword(s):  
Sugar Beet ◽  
Crop Yields ◽  
Water Footprint ◽  
Protein Yield ◽  
Field Crop ◽  
Water Efficiency ◽  
Crop Species ◽  
Physiological Factors ◽  
Oilseed Crops ◽  
Assessment Study

Abstract Water availability is one of the major physiological factors influencing plant growth and development. An assessment study has been done at the Szent István University, Gödöllő to evaluate and identify the water footprint of protein yield of field crop species. Twelve field crop species (Sugar beet Beta vulgaris, spring and winter barley Hordeum vulgare, winter wheat Triticum aestivum, maize Zea mays, sunflower Helianthus annuus, peas Pisum sativum, potato Solanum tuberosum, alfalfa Medicago sativa, oilseed rape Brassica napus, rye Secale cereale and oats Avena sativa) were involved in the study. Evapotranspiration patterns of the crops studied have been identified by the regular agroclimatology methodology and physiologically reliable protein ranges within crop yields were evaluated. The results obtained suggest, that water footprint of cereals proved to be the lowest, however maize values were highly affected by the high variability of protein yield. Oilseed crops had considerably high protein yield with medium water efficiency. Alfalfa, potato and sugar beet water footprints were in accordance with their evapotranspiration patterns. Protein based water footprint assessment seems to be more applicable in crop species evaluations than that of yield based methodologies.

scholarly journals Soil fertility and productivity of winter wheat depending on the cultivation technology

2020 ◽  
Author(s):  
V.M. Kildyushkin ◽  
◽  
A.G. Soldatenko ◽  
E.G. Zhivotovskaya ◽  
◽  
...  
Keyword(s):  
Winter Wheat ◽  
Soil Fertility ◽  
Grain Yield ◽  
Green Manure ◽  
Crop Residues ◽  
Crop Yields ◽  
Field Crop ◽  
Soil Density ◽  
Traditional Technology ◽  
Cultivation Technology

The influence of various technologies on soil fertility and field crop yields was studied. It was found that the content of humus in the 0–30 cm layer when applying fertilizers, crop residues, or green manure together with ameliorant, increased by traditional technology to 3.43 and by minimal to 3.45–3.47 %. Significant reserves of moisture in the 0–100 cm layer of soil under winter wheat were on the traditional and decompression technologies 137 and 125 mm, respectively. Soil density in the layers 0–20 and 20–40 cm was less by the traditional and decompression technologies, respectively, 1.32 and 1.34 g/cm3. The use of N136P18K15 provided an increase in grain yield to 34.4 с/ha.

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