Soil Reaction and Exchangeable Acidity

Hendershot, William H.; Lalande, H.; Duquette, Martin

doi:10.1201/9781420005271.ch16

Cited by 352 publications

(275 citation statements)

References 1 publication

Supporting

Mentioning

272

Contrasting

Unclassified

Order By: Relevance

“…4); there was a highly significant (P < 0.01) correlation between protein and oil content for both HC (r = -0.986, P < 0.001) and OPC (r = -0.936, P < 0.01) cultivars with an average change in oil content of 0.68 and 0.76% for every 1% increase in protein content within the range of values obtained in this study. Lower oil content in canola in response to increasing protein levels has been reported in a number of studies quoted by Grant and Bailey (1993) and by Jackson (2000) and examples of a negative correlation between oil content and protein content can be found in the work reported by Bhatty (1964), Balaji and Uppal (1986) and Wright et al (1988). Nitrogen removal by canola seed essentially mirrored the trends exhibited for seed yield (Table 7) with the exception that the effect of N:S ratio on N removal was significant (P < 0.1) in 5 of the 9 site-years compared with only one for the seed yield (Table 5).…”

Section: Response Of Seed Yield Protein and Oil Content To N And Smentioning

confidence: 71%

“…In contrast to the sites used by Karamanos et al (2005), which contained either deficient or marginal S levels, soils in these trials contained mean S levels in the 0-60 cm depth that are considered sufficient for growing canola (Saskatchewan Soil Testing Laboratory 1990;Doyle and Cowell 1993;Manitoba Agriculture, Food and Rural Initiatives 2004). All sites were sampled in a 4 by 13 grid covering the entire experimental site; each soil sample was ground to pass a 2-mm plastic sieve and analyzed for pH (1:2 soil:water) (Hendershot et al 1993); NO 3 -N using CaCl 2 extraction (Maynard and Kalra 1993); SO 4 -S using CaCl 2 extraction (Kowalenko 1993 For personal use only.…”

Section: Methodsmentioning

confidence: 99%

“…Subsequently, more work substantiated and quantified this interaction (Janzen and Bettany 1984;Bailey 1986;Grant and Bailey 1993;Jackson 2000;Malhi and Leach 2002). Janzen and Bettany (1984) and Nyborg et al (1974) observed decreases in canola (rapeseed) yield as a result of N application, when N was applied alone to S deficient soils.…”

mentioning

confidence: 99%

See 2 more Smart Citations

Nitrogen and sulphur fertilizer management for growing canola on sulphur sufficient soils

Karamanos¹,

Goh²,

Flaten³

2007

Can. J. Plant Sci.

View full text Add to dashboard Cite

. 2007. Nitrogen and sulphur fertilizer management for growing canola on sulphur sufficient soils. Can. J. Plant Sci. 87: 201-210. Canola is a crop that demands high nitrogen (N) and sulphur (S) inputs to achieve maximum seed yield. The practice of balancing these two nutrients by applying them in a fixed ratio has shown yield benefits on soils deficient in both these nutrients. A 9 site-year study was conducted between 2002 and 2004 to determine whether this practice is necessary for soils containing sufficient S levels. The practice was tested for both hybrid (HC) and open pollinated (OPC) canola cultivars by applying six rates of N (0, 40, 80, 120, 160 and 200 kg N ha -1 ) and supplementing N rates with S, so that three N:S ratios (1.5, 6 and 12 to 1) were achieved. Seed yield, protein and oil content responses of both HC and OPC cultivars were obtained primarily with N, with no evidence for a need of balancing this nutrient with S additions to achieve a ratio within those applied at this study. Hybrid canola cultivars overall yielded 23.7% more than OPC cultivars when they received the N application rate at which maximum yield of the OPC cultivars was obtained (120 kg N ha -1 ). Application of an additional 30 kg ha -1 to obtain maximum HC seed yield only resulted in an additional 1.5% yield advantage for the OPC. As N application rate was increased, small increases in seed protein levels (≈2.5%) were accompanied by a small reduction (≈2%) in seed oil content. Increased yield by HC compared with OPC canola reduces N residual fertility, hence, assessment of soil fertility status by soil testing after growing HC canola is a highly beneficial management practice. Our results indicate that the practice of balancing N and S to a fixed ratio is unnecessary and wasteful on canola grown on soils containing sufficient S. Le rendement grainier, la concentration de protéines et la teneur en huile des cultivars H et PL réagissent surtout aux engrais N, sans qu'il soit apparemment nécessaire d'équilibrer cet élément nutritif par un apport d'engrais S en vue d'obtenir un ratio situé dans la fourchette examinée. En général, les cultivars H donnent un rendement de 23,7 % supérieur à celui des cultivars PL avec la même quantité d'engrais que celle dont les cultivars PL ont besoin pour atteindre leur rendement maximal (120 kg de N par hectare). Appliquer 30 kg de N de plus par hectare aux cultivars PL comme on le ferait aux cultivars H pour qu'ils parviennent à leur rendement grainier maximal n'accroît leur rendement que de 1,5 %. Lorsqu'on augmente le taux d'application de N, la petite hausse de la concentration de protéines dans la graine (≈ 2,5 %) s'accompagne d'une légère baisse de la teneur en huile (≈ 2 %). Comparativement aux cultivars PL, la hausse du rendement des cultivars H réduit la fertilité résiduelle du N, de sorte qu'une analyse du sol s'avère une pratique très bénéfique après la culture de canola H. Les résultats de l'étude indiquent que vouloir équili-brer le N et le S selon des ratios établis pour cultiver...

show abstract

Section: Response Of Seed Yield Protein and Oil Content To N And Smentioning

confidence: 71%

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Nitrogen and sulphur fertilizer management for growing canola on sulphur sufficient soils

Karamanos¹,

Goh²,

Flaten³

2007

Can. J. Plant Sci.

View full text Add to dashboard Cite

show abstract

“…Soil samples were stored in airtight vials and analyzed for pH, organic carbon (OC), total P and N, available P, and effective cation exchange capacity (CEC) using standard methods. Soil pH was measured in triplicate using a glass electrode in a 2:1 water: soil suspension (Hendershot et al 2008). The LECO-C632 carbon determinator (LECOÓ Corporation 1987) was used to analyze two 0.3 g replicates of each soil sample for OC concentration.…”

Section: Soil Chemical Analysesmentioning

confidence: 99%

Long term effects of reduced fertilizer rates on millet yields and soil properties in the West-African Sahel

Adams

Gillespie

Kar

et al. 2016

Nutr Cycl Agroecosyst

View full text Add to dashboard Cite

Microdosing, the point-source application of a reduced fertilizer rate within 10 days of sowing, has increased short-term crop yields across the Sahel and is being actively scaled up as an agronomic practice. However, there is no information on the longterm effects of the technique upon soil fertility. To rectify this, this study used soil samples from the International Crop Research Institute for the SemiArid Tropics in Sadore, Niger, to assess the effects of 16 years of a reduced fertilizer rate of 15 kg N and 4.4 kg P ha -1 compared to unfertilized soil and a recommended rate of 30 kg N and 13.2 kg P ha -1 upon millet yield trend, soil chemical properties, and soil organic matter quality. The interaction of fertilizer with crop residue and manure amendments at 300, 900, and 2700 kg ha -1 was also assessed. Compared to unfertilized soil, the reduced fertilizer rate improved yield by 116 % but did not increase total N or available P. The recommended rate doubled available P and increased total N by 27 %, but resulted in slightly lower pH compared to the reduced rate. Yield trends were negative for both fertilizer treatments, indicating mineral fertilizer alone is not sustainable at Sadore. Crop residue or manure addition at 2700 kg ha -1 with fertilizer did not improve SOC but buffered pH by 0.3 units, provided nutrients beyond N and P, and changed the forms C and N functional groups in soil organic matter.

show abstract

“…Soil pH was determined using pH metre in soil / liquid suspension of 1: 2.5 according to [16]. Organic carbon was determined using chromic acid wet oxidation method according to [17].…”

Section: 3mentioning

confidence: 99%

Quantification of Heavy Metals using Contamination and Pollution Index in Selected Refuse Dumpsites in Owerri, Imo State Southeast Nigeria

S.U.¹,

I²,

Ihem³

et al. 2017

IJEAB

View full text Add to dashboard Cite

show abstract

Soil Reaction and Exchangeable Acidity

Cited by 352 publications

References 1 publication

Nitrogen and sulphur fertilizer management for growing canola on sulphur sufficient soils

Nitrogen and sulphur fertilizer management for growing canola on sulphur sufficient soils

Long term effects of reduced fertilizer rates on millet yields and soil properties in the West-African Sahel

Quantification of Heavy Metals using Contamination and Pollution Index in Selected Refuse Dumpsites in Owerri, Imo State Southeast Nigeria

Contact Info

Product

Resources

About