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The study of soil, hydrological, erosion and vegetation processes following wil...
Keizer, J.; Nunes, J.; Sande Silva, J.; Gomes Pereira, L.; Vieira, D.; Varela, M.; Prats, S.; Pinheiro, J.; Pereira, V.; Mendes, H.; Malvar, M.The EROSFIRE-II project (PTDC/AGR-CFL/70968/2006) has as overall aim to predict soil erosion risk in recently burnt forest areas, including following common post-fire forest management practices. Although the project’s main focus is on onsite erosion processes, also the export of sediments out of small catchments is addressed. To this end, a study area of about 60 ha located near to the village of Colmeal (...
Investigações sôbre a tristeza dos Citrus: VI - Alguns estudos fisiológicos sôb...
Grant,T. J.; Costa,A. S.; Mendes,H. C.; Paiva Neto,J. E. de; Catani,Renato A.The present paper reports the results of general studies undertaken to determine the relative importance of soil moisture and light on symptom expression of the tristeza disease. It also includes data on the effects of the disease on transpiration and chemical composition of infected plants and records the results of attempts to inactivate the tristeza virus in budwood by means of hot water and chemical treatme...
Sintomas de deficiências minerais no cafeeiro
Franco,C. M.; Mendes,H. C.Coffee plants (Coffea arabica L.) were grown in nutrient solutions for the purpose of studying deficiency symptoms of the following elements : nitrogen, phosphorus, potassium, magnesium, calcium, sulphur and iron. The methods employed in the growing of coffee plants in the nutrient solutions are described. After preliminary tests with several nutrient solutions Hoagland's formula was selected as most suitable f...
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