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To: gg cox who wrote (69209)	5/9/2008 10:15:06 AM
From: elmatador	Respond to of 74559

1st Mulching or burning: Specialists in the area of soil management battle with the productivity of the sugarcane and more importantly, sustainability, on the fertility of the soil. They also say it must be taken into consideration: different soils and ecological zones, and other sugarcane varieties. There are strong indications that: • Leaving the dead leaves on the soil surface increases biomass production, improves soil fertility and increases the amount of carbon sequestered in soil. • Application of urea to the soil, up to a level of 150 kg N/ha, increased biomass yield and the nutritional quality of the sugar cane for animal feeding. • The effects of mulching (leaving the dead leaves on the soil) and of N fertilization were mostly additive, indicating there was no apparent conflict between these two management practices. In view of the implications of the results of this trial on indicators of sustainability it is of utmost importance to extend this research to take in plant as well as ratoon cane, different soils and ecological zones, and other sugarcane varieties. Effect on production of sugar cane and on soil fertility of leaving the dead leaves on the soil or removing them cipav.org.co

To: gg cox who wrote (69209)	5/9/2008 10:26:20 AM
From: elmatador	Respond to of 74559

Fertilizer: can even reach 35% of the production cost Around 200 kilos of NPK are used per hectare of sugar cane. This number varies, however, depending of the necessities of the soil and its distance in relation to the distillery. In areas near the distilleries the use of ferti-irrigation with vinasse reduces the need of chemical fertilizers. The quantity of chemical fertilizers used in the production of sugar cane tends to decline with the technological advancement because this item can even reach 35% of the production cost (EMBRAPA, 2006).