Change detection in boreal forests using bi-temporal aerial photographs

[Abstract]

Individual tree measurements by means of digital aerial photogrammetry

University of Helsinki, Faculty of Agriculture and Forestry, Department of Forest Resource Management

Geometrically accurate time series of archived aerial images and airborne lidar data in a forest environment

Abstract

Landsat TM imagery and high altitude aerial photographs in estimation of forest characteristics

Abstract

Assessment on nutrient levels in the aerial biomass of irrigated guava in São Francisco Valley, Brazil

In perennial crops, fertilizers are applied to restore the amount of nutrient removed from the plant by harvesting. Nevertheless, the immobilized nutrient inside the whole plant should be considered. Based on it, the nutrient concentrations in the guava leaf and fruit and the nutrient contents removed by fruits and post-harvest pruning were evaluated in an irrigated orchard, in Petrolina, State of Pernambuco, Brazil. The greatest contents removed by fruits were N and K among the macronutrients, while Fe, Zn and Mn presented higher levels among the micronutrients. More than 60% of the total content of N, P, K, Mg, Fe, and B removed by pruning were immobilized in the leaf and non-marketable fruit.