Comparison of conventional and alternative vegetable farming systems on the properties of a yellow earth in New South Wales

Wells, A. T.; Chan, K. Y.; Cornish, Peter S

doi:10.1016/s0167-8809(00)00133-x

Cited by 113 publications

(63 citation statements)

References 17 publications

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“…The highest content of exchangeable K (0.35 cmol kg -1 ) in the postharvest soil was obtained from vermicompost at the rate of 10 t ha -1 and 50% chemical fertilizers (T 7 treatment) and the lowest K content (0.22 cmol kg -1 ) was found in control (T 1 ) treatment. Significant effect of organic fertilizers improved exchangeable K content in soil as reported by Mathew and Nair (1997) and Wells et al (2000). The highest exchangeable Ca content (11.67 cmol kg -1 ) was obtained in T 7 treatment when vermicompost at the rate of 10 t ha -1 and 50% chemical fertilizers were applied and control (T 1 ) treatment gave the lowest value (8.87 cmol kg -1 ) in soils.…”

Section: Effect Of Vermicompost and Chemical Fertilizers On Nutrient supporting

confidence: 57%

“…Interaction between organic and chemical fertilizers also showed an increasing effect of P content in soil. Application of organic fertilizer increased available P content in soil (Mathew and Nair, 1997;Wells et al, 2000;Abdel and Hussain, 2001;Iftikhar and Qasim, 2003). The highest content of exchangeable K (0.35 cmol kg -1 ) in the postharvest soil was obtained from vermicompost at the rate of 10 t ha -1 and 50% chemical fertilizers (T 7 treatment) and the lowest K content (0.22 cmol kg -1 ) was found in control (T 1 ) treatment.…”

Section: Effect Of Vermicompost and Chemical Fertilizers On Nutrient mentioning

confidence: 99%

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Yield and Nutrient Content of Tomato as Influenced by the Application of Vermicompost and Chemical Fertilizers

Mukta

Rahman

Mortuza

2016

J. Environ. Sci. & Natural Resources

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A pot experiment was conducted to investigate the yield and nutrient content of tomato (Lycopersicon esculentum) as influenced by the application of vermicompost and chemical fertilizers. The experiment was laid out in a completely randomized design (CRD) with 3 replications and comprised of 8 treatments viz., T 1 -control, T 2 -recommended dose of NPK fertilizers (CF), T 3 -vermicompost @ 5 t ha -1 (VC 1 ), T 4 -vermicompost @ 10 t ha -1 (VC 2 ), T 5 -VC 1 + 50% CF, T 6 -VC 1 + 75% CF, T 7 -VC 2 + 50% CF and T 8 -VC 2 + 75% CF. Application of vermicompost @ 10 t ha -1 along with 50% chemical fertilizers showed the best performance for plant height, number of leaves plant -1 , number of flowers branch -1 , number of fruits branch -1

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Section: Effect Of Vermicompost and Chemical Fertilizers On Nutrient supporting

confidence: 57%

Section: Effect Of Vermicompost and Chemical Fertilizers On Nutrient mentioning

confidence: 99%

Yield and Nutrient Content of Tomato as Influenced by the Application of Vermicompost and Chemical Fertilizers

Mukta

Rahman

Mortuza

2016

J. Environ. Sci. & Natural Resources

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“…When excluding these three results, the mean rate of change was similar in short-term and long-term experiments (0.61% ± 0.36). The increase in SOC in these three examples (Wells et al 2000;Melero et al 2006) was due to exceptionally high rates of compost application.…”

Section: General Resultsmentioning

confidence: 85%

“…Therefore, it is suggested as a measure to improve the overall greenhouse gas balance of agriculture compared to conventional farming (Drinkwater et al 1998;Liebig and Doran 1999;Niggli et al 2009;Wells et al 2000). However, this view is not undisputed as some studies have shown no or no consistent effect on SOC (Friedel 2000;Shannon et al 2002;Marinari et al 2006).…”

Section: Introductionmentioning

confidence: 99%

Organic Farming and Soil Carbon Sequestration: What Do We Really Know About the Benefits?

Leifeld

Fuhrer

2010

AMBIO

139

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Organic farming is believed to improve soil fertility by enhancing soil organic matter (SOM) contents. An important co-benefit would be the sequestration of carbon from atmospheric CO 2 . Such a positive effect has been suggested based on data from field experiments though many studies were not designed to address the issue of carbon sequestration. The aim of our study was to examine published data in order to identify possible flaws such as missing a proper baseline, carbon mass measurements, or lack of a clear distinction between conventional and organic farming practices, thereby attributing effects of specific practices to organic farming, which are not uniquely organic. A total of 68 data sets were analyzed from 32 peer-reviewed publications aiming to compare conventional with organic farming. The analysis revealed that after conversion, soil C content (SOC) in organic systems increased annually by 2.2% on average, whereas in conventional systems SOC did not change significantly. The majority of publications reported SOC concentrations rather than amounts thus neglecting possible changes in soil bulk density. 34 out of 68 data sets missed a true control with well-defined starting conditions. In 37 out of 50 cases, the amount of organic fertilizer in the organic system exceeded that applied in the compared conventional system, and in half of the cases crop rotations differed between systems. In the few studies where crop rotation and organic fertilization were comparable in both systems no consistent difference in SOC was found. From this data analysis, we conclude that the claim for beneficial effects of organic farming on SOC is premature and that reported advantages of organic farming for SOC are largely determined by higher and often disproportionate application of organic fertilizer compared to conventional farming.

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“…After planting the soil surface remain uncovered until development of the crop and as such exposed to precipitation and wind. The result of such a situation is erosion, damage to soil structure and nutrient losses (run-off and leaching to deeper layers) (Wells et al, 2000). Decomposition is faster in areas with higher mean annual temperatures and higher annual total precipitation (Franzluebbers, 2002, Balota et al, 2003.…”

Section: Introductionmentioning

confidence: 99%

Wheat straw decomposition, N-mineralization and microbial biomass after 5 years of conservation tillage in Gleysol field / Razgradnja pšenične slame, mineralizacija-N in mikrobna biomasa po petih letih ohranitvene obdelave oglejenih tal

Turk¹,

Mihelič²

2013

Acta Agriculturae Slovenica

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Long-term field experiment to follow various effects of conservation soil tillage is conducted at Biotechnical faculty in Ljubljana. The soil is Eutric Gleysol. Conventional treatment with plowing, 22 cm deep P, and conservation treatment by rotary harrow to a depth of 10 cm N, and subplots with compost amendment (-c) and without fertilization (-n) were observed. After 5 years nutrient contents and organic matter were higher in N than P. Compost addition had a positive effect on microbial biomass, but the tillage system did not affect it. However, nitrogen mineralization and decomposition of straw were higher in P as in N, and in the soil depth of 15 -20 cm than in the 5 -10 cm.

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Comparison of conventional and alternative vegetable farming systems on the properties of a yellow earth in New South Wales

Cited by 113 publications

References 17 publications

Yield and Nutrient Content of Tomato as Influenced by the Application of Vermicompost and Chemical Fertilizers

Yield and Nutrient Content of Tomato as Influenced by the Application of Vermicompost and Chemical Fertilizers

Organic Farming and Soil Carbon Sequestration: What Do We Really Know About the Benefits?

Wheat straw decomposition, N-mineralization and microbial biomass after 5 years of conservation tillage in Gleysol field / Razgradnja pšenične slame, mineralizacija-N in mikrobna biomasa po petih letih ohranitvene obdelave oglejenih tal

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