...As far as your wild figures of Brazil boosting ethanol production by a factor of 35, you'll need to cite actual sources if you want to be taken seriously. Posting links to previous posts containing unsupported claims doesn't count.
The earlier post told the source (the most important agricultural university in Brazil did the study and made the report) but It is in Portuguese, so not much use to you I assume. (also I do not have it. - I only read the summary article in Folio de Sao Paulo and that was some months ago, so no longer have even that.)
Below is some related news from only a few days ago, in English you can check.
You have no reason to call my information "wild and unsuported," except your lack of ability to follow the studies being done in Brazil. (I named the university that did the study in the earlier post.)
It shows that the need to rotate crops (to avoid excessive cost of fertalizer) is potentially capable of restoring spent pasture to food production (unlike US corn based alcohol, cane produced alcohol may INCREASE the land in food production, if the spent pasture and old pasture, which has now reverted to forest, is added to the agricultural land in use. (Alternately producing sugar cane and peanuts, soybeans or other legumes to add nitrogen to the soil.) Note also that more than half of the alcohol currently produced in Brazil comes from the state of Sao Paulo (one small part of Brazil, near the domestic market) alone. As I told you, the reason US produces essentially the same volume as Brazil reflection the marginal economics in Brazil with the US market closed to imports, not the lack of land.
The following is from:
http://www.ipsnews.net/news.asp?idnews=38675
" ...Brazil's Ministry of Agriculture announced on Jul. 17 that it will ban sugarcane encroachment in the Amazon and the Pantanal, a vast wetland in the west of the country that extends into Paraguay and Bolivia. The ban will take effect through a registry of the areas in which new crops can be planted, and is to be ready within a year.
The purpose is to provide
incentives for sugarcane expansion in agricultural areas already degraded by use as pastureland. ..."The expansion of sugarcane in Sao Paulo is already occurring, especially in pasture areas... There is no reason to take over forests, because this
country has plenty of degraded land available," Marcos Landell, director of the Sugarcane Agronomy Institute (IAC), told Tierramérica.
A study by the IAC, associated with the government of Sao Paulo state, shows that in the last 30 years production levels jumped from 65 to 90 tonnes of sugarcane per hectare. The number of harvests grew from three to six per year, which increased the sector's environmental impacts.
Also on the rise is the mechanical collection of raw cane. In this way, the
leaves are not burned off and instead fall to the ground to decompose as natural fertiliser. According to Landell, in some areas there are up to 20 tonnes of stubble per hectare per year, which represents
a huge return of organic material for the tropical soils.
Sugarcane today covers seven million hectares in Brazil, four million in Sao Paulo state alone. With the production level of 30 years ago, twice the area would be needed to obtain the same amount of alcohol produced today, or about 7,000 litres per hectare. The experts hope to push it further, to 11,000 litres per hectare in the next few years by using genetic and industrial improvements.
In 15 years more, the increase in yields across the system should be 80 percent.
"In this way, the planted area would not surpass 30 million hectares," says Landell.
Improvements over the past decade allowed cultivation of more than 80 types of sugarcane, "the crop with the greatest number of varieties on each farm. This diversity creates resistance and helps protect the plants from diseases," he explained.
As a result, less pesticide is used. The new varieties are resistant to many of the diseases that tend to affect cane fields.
According to the IAC,
the advance of sugarcane could even promote production of food. Fifteen percent of the country's cane fields are available each year for rotation with crops to help renew the soils, which represents millions of hectares for growing soybeans, peanuts and other crops.
In the Sao Paulo region of Ribeirao Preto, direct planting -- without tilling or removing waste from previous crops -- is increasingly being used for renewing cane fields. Cane farmers cultivate and harvest fast-growing varieties of soybean and peanut in the stubble left from cane before beginning a new sugarcane cycle.
On some farms, the new cane is planted among the stubble of the harvested legumes. "This is an irreversible trend," says Landell.
Direct planting without burning off cane leaves is a practice that can be adopted in all sugarcane-growing regions across Brazil, according to the Sao Paulo Agribusiness Technology Agency (APTA).
An estimated
one tonne of carbon dioxide is captured per hectare of raw sugarcane harvested.
"When the collection of raw cane is collected -- whose biowaste increases the moisture and fertility of the soil -- is combined with direct planting, the
environmental benefits are reinforced," APTA researcher Denizart Bolonhezi told Tierramérica.
In Ribeirao Preto, there are 40,000 hectares of peanut cultivated using direct planting and traditional techniques in sugarcane renewal areas. Two cooperatives, Coopercana, in Sertaozinho, and Coplana, in Guariba, collect and sell the peanuts.
I will read rest of your post and try to reply, if needed, soon - I am traveling back to Brazil tomorrow eve and busy now, but often I get Email notices like the above, so I sent it as support of what I have posted.