Volume 31, Number 2, 2007

Unless fertilizer is properly placed in the soil it can be harmful. This experiment was conducted to study cotton (Gossypium hirsutum) root growth and initial plant development and nutrition as affected by fertilizer placement. Cotton plants were grown in pots with a glass wall. The fertilizer was applied 5.0 cm under the seed row and 0, 2.5, 5.0 and 10.0 cm beside the seed row. Root growth was evaluated every 3 days, and 21 days after emergence the plants were […]

The magnitude of the vertical movement of nutrients in the soil profile determines their contact with plant roots and leaching, thus affecting the timing and method of fertilizer application. This study aimed to assess the K mobility in the soil as influenced by rate and method of potassium chloride addition. The experiment was carried out in 1998, using 7.5 cm wide and 35 cm long PVC leaching columns. Potassium was applied at rates of 0, 150 and 300 mg kg-1 […]

Ethnopedology deals mainly with indigenous knowledge on pedo-diversity. In this sense, the agricultural and cultural traditions of the Wapishana Indians in Roraima, of the Arawak linguistic background, constitute a relevant pool of ethno-scientific knowledge in Amazonia. The Federal University of Roraima has increasingly acknowledged their importance in the Indigenous Education undergraduate courses. In this study, the ethnopedological classifications of the Wapishana Indians were confronted with the Brazilian System of Soil Classification in a soil survey of the Malacacheta Indian Territory. […]