868 Articles found
Soil Science Society of America (SSSA) Articles
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Determination of a critical nitrogen dilution curve for spring wheat
Plant-based diagnostic tools of N deficiency can be based on the concept of critical N dilution curves describing whole-plant critical N concentration (Nc; g kg–1 of dry matter [DM]) as a function of shoot biomass (W; Mg DM ha–1). This has been ...
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Critical grain and stover nitrogen concentrations at harvest for summer maize production in China
A uniform critical N concentration is desirable to serve as an indicator of N status and to guide agricultural practice and regulation. Our objective was to evaluate whether grain and stover N concentrations in summer maize (Zea mays L.) at harvest ...
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Response of upland rice cultivars to nitrogen fertilizer in the savannas of Nigeria
In the dry savannas of West Africa, cultivation of upland rice (Oryza spp.) under rain-fed conditions is expanding due to the introduction of the New Rice for Africa (NERICA; WARDA, Bouake, Cote d`Ivoire) but appropriate N recommendations for these ...
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A root-zone soil regime of wheat: physiological and growth responses to furrow irrigation in raised bed planting in northern China
Different irrigation methods in wheat (Triticum aestivum L.) result in different water and nutrient use efficiencies and, ultimately, plant growth. A field experiment was conducted during the 2006–2007 and 2007–2008 crop cycles to investigate the ...
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Nitrogen contribution from red clover for corn following wheat in western Ohio
Inclusion of a winter legume cover crop into a crop rotation has been suggested as a method to provide a substantial portion of the N requirement of the following crop. While the benefits of winter cover crops such as reduced soil erosion, increased ...
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Living mulch nutritive value in a corn-soybean-forage rotation
Living mulches can function to supply forage in multifunctional cropping systems. Information quantifying nutritive value of forage plants in living mulch cropping systems is limited. The objective of this research was to quantify the nutritive ...
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Irrigation frequency effects on growth and ethanol yield in sweet Sorghum
With the increasing costs of fossil fuels, new methods of generating renewable fuels need to be researched and developed. This study was undertaken to assess the effects of irrigation frequency on crop growth and ethanol yield of sweet sorghum ...
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Dryland performance of sweet sorghum and grain crops for biofuel in Nebraska
Sweet sorghum [SS; Sorghum bicolor (L.) Moench] is a potential biofuel crop for the Great Plains. Sweet sorghum was compared with corn [Zea mays (L.)] and grain sorghum for potential ethanol yield, energy use efficiency, and greenhouse gas (GHG) ...
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Response of bt and near-isoline corn hybrids to plant density
Transgenic Bt (Bacillus thuringiensis) corn (Zea mays L.) hybrids with resistance to corn rootworm (CRW; Diabrotica spp.) or European corn borer [ECB; Ostrinia nubilalis (Hübner)] can have greater tolerance to water and nutrient stress, and thus may ...
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Supplementation strategies effects on performance of beef heifers grazing stockpiled pastures
The increased cost of inputs has led livestock producers in the southeastern United States to use alternative management practices to supplement beef cattle (Bos spp.) on pastures. The objective of this study was to evaluate the performance of beef ...
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Eastern gamagrass management for pasture in the Mid-Atlantic region: i. animal performance and pasture productivity
Eastern gamagrass [Tripsacum dactyloides (L.) L.] (EG) is a native, warm-season perennial grass with potential as pasture for the eastern United States, but its value has not been well studied. The objective of this 4-yr experiment was to estimate ...
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Eastern gamagrass management for pasture in the Mid-Atlantic region: ii. diet and canopy characteristics, and stand persistence
Eastern gamagrass [Tripsacum dactyloides (L.) L.] (EG), a native warm-season perennial grass, lacks evaluation for use in grazing systems. Our objective was to test EG in a 4-yr experiment to estimate forage mass (FM) that maximizes steer (Bos ...
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Optimizing stocking rate for maximum return to a wheat–cattle enterprise using model simulation and economics
Managing dual-purpose wheat is complex because of the tradeoff relationship between cattle (Bos taurus) and wheat (Triticum aestivum L.) production. Stocking rate (SR) and planting date are key decision variables of the dual systems. The objective ...
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Skip-row and plant population effects on sorghum grain yield
In environments with limited rainfall, skip-row configuration (planting one or a group of rows alternated with rows not planted) under rainfed conditions may increase yield of grain sorghum [Sorghum bicolor (L.) Moench] due to conservation of soil ...
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Productivity, oil content, and composition of two spearmint species in Mississippi
‘Scotch’ (Mentha x gracilis Sole) and ‘Native’ (Mentha spicata L.) spearmints are grown in the northern United States, but have not been evaluated in the Southeast. Two-year field studies were conducted in Mississippi at two locations (Verona and ...
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Competitive interactions between cultivated and red rice as a function of recent and projected increases in atmospheric carbon dioxide
Because wild lines of the same species often represent a weedy constraint to cultivated crops in the field, any differential response to atmospheric carbon dioxide concentration, [CO2], may alter weed–crop competition and seed yield. We evaluated ...
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De-inking paper sludge amendment affects weeds in the presence or absence of herbicide in a soybean-corn rotation
The application of de-inking paper sludge (DPS), a C-rich but N-poor soil amendment, can sometimes decrease plant growth. This property needs to be investigated to develop the knowledge and management methods necessary for potential weed control. ...
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Rotational effects of cuphea on corn, spring wheat, and soybean
Diversifying crop rotations can give economic and environmental benefits. Cuphea (Cuphea viscosissima Jacq. x C. lanceolata W.T. Aiton) is a new oilseed crop that grows well in the Corn Belt. However, little is known about its rotational effect on ...
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Rate and timing of potassium fertilization and fungicide influence rice yield and stem rot
Potassium deficient rice (Oryza sativa L.) is susceptible to diseases including stem rot (Sclerotium oryzae Catt.). Knowledge of how to manage K deficiency and the increased disease susceptibility is necessary to reduce rice yield losses. Our ...
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Long-term fertilizer experiment network in China: Crop yields and soil nutrient trends
Results are summarized for the first 15 yr of an eight-site, long-term experimental network in China designed to assess the sustainability of cropping systems in environments representing 70% of Chinese cropland. Systems were wheat–maize double ...