Transition from conventional to low-input agriculture changes soil fertility and biology

Scow, Kate M.; Somasco, Oscar; Gunapala, Nirmala; Lau, S.S.; Venette, Robert C.; Ferris, H.; Miller, Robert Pritchard; Shennan, Carol

doi:10.3733/ca.v048n05p20

Cited by 114 publications

(61 citation statements)

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“…The lack of significant differences among first year treatments supports growing evidence that the effects of organic fertilizers on soils and plants are detectable only in the long term (Culik, 1983;Scow et al, 1994;Phelan et al, 1995). The explanation in this case, however, does not seem to be the long-term effect of the organic fertilizer.…”

Section: Discussionsupporting

confidence: 54%

Traditional fertilization and its effect on corn insect populations in the Guatemalan highlands

Morales

Perfecto

Ferguson

2001

Agriculture, Ecosystems & Environment

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Cakchiquel farmers in Patzún, Guatemala stated that pest populations have increased in corn crops since they abandoned organic fertilization and adopted synthetic fertilizers. Given the dearth of scientific information about the effects of fertilization practices on pests, a controlled experiment was performed to elucidate these interactions. Pests, their natural enemies, and nutritional status were compared among corn plots with synthetic and organic fertilizers, and a control without fertilizer. Corn in fields treated with organic fertilizer applied for at least 2 years hosted fewer aphids (Rhopalosiphum maidis) than corn treated with synthetic fertilizer. This difference seems attributable to high concentration and total content of foliar nitrogen in corn in the synthetic fertilizer plots, although numbers of Spodoptera frugiperda showed a weak negative correlation with increased nitrogen levels. Coccinellidae populations were higher in plots with high aphid populations, but only where organic fertilizer was applied. There were no significant yield differences among treatments.

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Section: Discussionsupporting

confidence: 54%

Traditional fertilization and its effect on corn insect populations in the Guatemalan highlands

Morales

Perfecto

Ferguson

2001

Agriculture, Ecosystems & Environment

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“…Andrews et al (2002) reported that the application of composts increased organic carbon compared with conventional fertilizing. Scow et al (1994) reported that organic matter increased after alternate the application of compost.…”

Section: Resultsmentioning

confidence: 99%

Comparison among Different Integrated Nutrition Management for Soil Micro and Macro Elements after Winter Wheat Harvesting and Yield

et al. 2010

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A comparative field experiment has been conducted in order to study the effect of chemical, organic and integrated nitrogen suppliment on micro and macro nutrient residue after wheat harvesting, at Faculty of Agriculture, Tarbiat Modares University, Tehran, Iran. The treatments consisted in three groups that are chemical, organically and integrated of them. Nitrogen was supplied in different proportion from chemical and organic sources. Also, zeolite was applied in two ways: mixed with soil and mixed with cattle manure during composting. Before sowing and after wheat harvesting, macro and micro nutrient availability in the soil were examined. The results showed that, among treatments supplying with 100% nitrogen required from composted cattle manure amended with 10% (w/w) zeolite had the best effect on nutrition residue after wheat production because zeolite decreased nitrogen leaching during the manure composting. Crop yield was not statistically different between fertilizer treatments but the highest seed yield was achieved from supplying 50% nitrogen required from cattle manure compost and 50% by urea amended with 10% (w/w) zeolite. This study demonstrated that composted cattle manure amended with zeolite improves soil fertility after wheat production compared with chemical fertilization.

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“…Intensive use of chemical fertilizers can jeopardize the conservation of soil and invites some new problems, which may create potential health hazards (Pradhan, 1992). Conversion from commercial fertilizer (conventional farming) to organic farming causes changes in the soil other than the fertility effects that can affect plant growth (Power and Doran, 1984;Scow et al, 1994;Drinkwater et al, 1995). The principle aims of organic farming as expressed in the recent version (IFOAM, 1996) are (i) to produce food of high nutritional qualities (ii) to maintain and increase long term fertility of soil and (iii) to minimize all forms of pollution that may results from agricultural practices.…”

Section: Introductionmentioning

confidence: 99%

Effect of Organic Farming on Nutrient Uptake and Quality of Potato

Islam

Nahar

2013

J. Environ. Sci. & Natural Resources

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The experiment was carried out at the Environmental Science Field Laboratory, Bangladesh Agricultural University, Mymensingh during the period November 2004 to February 2005 to evaluate the effect of organic farming on soil and potato quality. The experiment was laid out in a randomized complete Block Design with five treatment and three replications. The treatments and their combinations were cowdung, poultry manure, inorganic fertilizer, cowdung plus inorganic fertilizer and poultry manure plus inorganic fertilizer. The nutrient content of P, K, Ca, Mg, Zn of tuber and haulm, and starch and protein content in tuber were highest in cowdung treated potato and but N and S content of both tuber and haulm were highest in case of poultry manure. The uptake of P, K, Mg and S of both tuber and haulm in case of poultry manure but N and Zn uptake was highest in case of poultry manure plus inorganic fertilizer. Finally, calcium uptake was highest in cowdung in both cases of tuber and protean and starch contents were influenced by organic farming.

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Transition from conventional to low-input agriculture changes soil fertility and biology

Cited by 114 publications

References 0 publications

Traditional fertilization and its effect on corn insect populations in the Guatemalan highlands

Traditional fertilization and its effect on corn insect populations in the Guatemalan highlands

Comparison among Different Integrated Nutrition Management for Soil Micro and Macro Elements after Winter Wheat Harvesting and Yield

Effect of Organic Farming on Nutrient Uptake and Quality of Potato

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