Conservation and Development Projects
Develop your project in this amazing natural area, inside the Atlantic Forest and close to the Ocean. Projects will have the supervison of Ricardo Esplugas, PhD, who is present on the site.
Soil chemistry / physics: we are interested in developing techniques to measure and correct soil pH and also to educate the local community in this respect
Sapirara is an agricultural town. It is known as Pineapple land. Pineapples grow very well and Sapirara because of a combination of climate (hot) and appropriate soil. Pineapples require an acidic soil, and that is just what you find in Sapirara. However, the high acidity of the soil can be a problem when other crops need to be grown.
Research conducted by Dr Ricardo has found that , according to acidity, 3 main types of soil can be found in the area: there is a very acid soil in the deforested areas, an acid soil which is a layer of clay that is just beneath the surface and finally a neutral and very fertile soil in the forest and in the transition areas.
The yellow clay layer has good mechanical properties and has been used to build houses.
The very acidic soil can be treated with lime (calcium carbonate) so that its pH is increased, and brought close to neutral levels. It is necessary to work out how much lime must be applied and how long will take the process of neutralization.
Dr Ricardo has also collaborated with neighbouring farms, by analysing their soils and assessing the present degree of acidity and how successful have their treatments been. In many cases it has been found that the amount of lime used was not enough to achieve the desired soil pH.
The good news is that many people, including ourselves, have been successful at treating the Sapirara soil in order to develop a range of crops (and not only the acidity loving ones).
The use of ash is an interesting alternative to lime. In fact, ash is even better than lime because it brings trace nutrients, as well as correcting pH levels.
Jilo, a very tasty brazilian vegetable (photo on the right), has been successfully grown on the deforested area after soil treatment.
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