Biochar: Effects on Soil and Crops - Revision history

Claire Robinson: /* Resources */

2009-12-01T15:10:45Z

Resources

Claire Robinson: /* Resources */

2009-12-01T15:10:31Z

Resources

Claire Robinson at 15:03, 1 December 2009

2009-12-01T15:03:03Z

Claire Robinson: /* Crop yield */

2009-12-01T14:59:19Z

Crop yield

Claire Robinson: /* Crop yield */

2009-12-01T14:57:25Z

Crop yield

Claire Robinson: /* Crop yield */

2009-12-01T14:56:28Z

Crop yield

Claire Robinson: /* Crop yield */

2009-12-01T14:53:35Z

Crop yield

Claire Robinson: /* Crop yield */

2009-12-01T14:52:06Z

Crop yield

Claire Robinson: /* Crop yield */

2009-12-01T14:51:06Z

Crop yield

Claire Robinson: /* Crop yield */

2009-12-01T14:48:14Z

Crop yield

@@ Line 61: / Line 61: @@
 *[[Biochar]]
 *[[Biochar: Carbon Sequestration]]
 *[[Biochar Lobby]]

@@ Line 61: / Line 61: @@
 *[[Biochar]]
-*[[The Biochar Lobby]]
+*[[Biochar: Effects on Soil and Crops]]
 ==Notes==

@@ Line 47: / Line 47: @@
 ==Nutrient content of plants==
 A field study carried out in Brazil on highly weathered soil looked at the effect of different fertilizers on nutrient content of the plants grown. The plants fertilized with chicken manure had the highest nutrient content followed by plants that received compost and/or mineral fertilizer. Chicken manure significantly improved the potassium and phosphorus nutrition in comparison to all other treatments. Charcoal applications did not show a significant influence on nutrient levels.<ref>Christoph Steiner et al., Long term effects of manure, charcoal and mineral fertilization on crop production and fertility on a highly weathered Central Amazonian upland soil, Plant Soil (2007) 291: 275–290.</ref>
 ==Resources==

← Older revision		Revision as of 14:59, 1 December 2009
Line 44:		Line 44:

	Longer-term field studies are ongoing.		Longer-term field studies are ongoing.
		+
		+	==Nutrient content of plants==
		+	A field study carried out in Brazil on highly weathered soil looked at the effect of different fertilizers on nutrient content of the plants grown. The plants fertilized with chicken manure had the highest nutrient content followed by plants that received compost and/or mineral fertilizer. Chicken manure significantly improved the potassium and phosphorus nutrition in comparison to all other treatments. Charcoal applications did not show a significant influence on nutrient levels.<ref>Christoph Steiner et al., Long term effects of manure, charcoal and mineral fertilization on crop production and fertility on a highly weathered Central Amazonian upland soil, Plant Soil (2007) 291: 275–290.</ref>

	==Resources==		==Resources==

@@ Line 39: / Line 39: @@
 global change 11, 429-444.</ref>
-Bruno Glaser reviewed studies on yield conducted during the 1980s and 1990s and found marked positive impacts on yield of low applications of charcoal to soil. However, in some cases, higher rates seemed to inhibit plant growth.
+Bruno Glaser reviewed studies on yield conducted during the 1980s and 1990s and found marked positive impacts on yield of low applications of charcoal to soil. However, in some cases, higher rates seemed to inhibit plant growth.<ref>Glaser, B., Haumaier, L., Guggenberger, G., Zech, W., 2001. The 'Terra Preta' phenomenon: a model for sustainable agriculture in the humid tropics. Naturwissenschaften, 37-41.</ref>
 The varying effects on yield appear to depend on such factors as quantities added, soil type, and crop tested.
-Longer-term field studies are ongoing but data is not available as of June 2009.
+Longer-term field studies are ongoing.
 ==Resources==

@@ Line 33: / Line 33: @@
 *Research over four cropping cycles with rice and sorghum found that charcoal amended with chicken manure resulted in the highest cumulative crop yield<ref>Steiner, C., Teixeira, W.G., Lehmann, J., Nehls, T., MacêDo, J.L.V., Blum, W.E.H., Zech, W., 2007. Long term effects of manure, charcoal and mineral fertilization on crop production and fertility on a highly weathered Central Amazonian upland soil. Plant and Soil 291, 275-290.</ref>
 *In a study part-funded by the [[Rockefeller Foundation]], research on maize on degraded soil in Kenya showed that charcoal doubled crop yield.<ref>Kimetu J, Lehmann HJ, Ngoze S, Mugendi D, Kinyangi J, Riha S, Verchot L, Recha J and Pell A 2008 Reversibility of soil productivity decline with organic matter of differing quality along a degradation gradient. Ecosystems, in press. Summary here: [http://www.css.cornell.edu/faculty/lehmann/research/biochar/biocharproject.html Mitigation of Soil Degradation with Biochar], Field Experiment, Western Kenya, 2008.</ref>
 ==Resources==

@@ Line 32: / Line 32: @@
 *Research on common beans in Colombia found increased nitrogen fixation through charcoal additions, resulting in increased bean yield by 46% and biomass production by 39%<ref>Rondon, M.A., Lehmann, J., Ramirez, J., Hurtado, M., 2007. Biological nitrogen fixation by common beans (Phaseolus vulgaris L.) increases with bio-char additions. Biology and Fertility of Soils 43, 699-708.</ref>
 *Research over four cropping cycles with rice and sorghum found that charcoal amended with chicken manure resulted in the highest cumulative crop yield<ref>Steiner, C., Teixeira, W.G., Lehmann, J., Nehls, T., MacêDo, J.L.V., Blum, W.E.H., Zech, W., 2007. Long term effects of manure, charcoal and mineral fertilization on crop production and fertility on a highly weathered Central Amazonian upland soil. Plant and Soil 291, 275-290.</ref>
-*Research on maize on degraded soil in Kenya showed that charcoal doubled crop yield.<ref>Kimetu et al., [http://www.css.cornell.edu/faculty/lehmann/research/biochar/biocharproject.html Mitigation of Soil Degradation with Biochar], Field Experiment, Western Kenya, 2008.</ref>
+*Research on maize on degraded soil in Kenya showed that charcoal doubled crop yield.<ref>Kimetu J, Lehmann HJ, Ngoze S, Mugendi D, Kinyangi J, Riha S, Verchot L, Recha J and Pell A 2008 Reversibility of soil productivity decline with organic matter of differing quality along a degradation gradient. Ecosystems, in press. Summary here: [http://www.css.cornell.edu/faculty/lehmann/research/biochar/biocharproject.html Mitigation of Soil Degradation with Biochar], Field Experiment, Western Kenya, 2008.</ref>
 ==Resources==