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All publications of “Regina Maria Quintão Lana”

5 results

Sugarcane Root Development and Yield under Different Soil Tillage Practices

Emmerson Rodrigues de Moraes, José Geraldo Mageste, Regina Maria Quintão Lana, José Luiz Rodrigues Torres, Luis Augusto da Silva Domingues, Ernane Miranda Lemes, [...]


ABSTRACT New strategies for sugarcane production have been very important since the incorporation of ethanol in the Brazilian energy mix in the early 1970s. Prior to planting sugarcane, the soil is prepared, and this process can affect root development and, consequently, sugarcane production. This study was conducted in an area of sugarcane crop renewal in the Cerrado biome (Brazilian tropical savanna), with the objective of identifying which tillage system generates the better root development and improved yield in sugarcane. The […]

Coffea arabica L. nutritional status survey based on dris, in the Upper Paranaíba region – Minas Gerais

Regina Maria Quintão Lana, Sebastião Alberto de Oliveira, Ângela Maria Quintão Lana, Marcos Vieira de Faria


A striking characteristic of soils under savanna vegetation is the low natural fertility, as in soils in the Upper Paranaíba region – MG. This characteristic is aggravated by the use of low fertilizer quantities, which may cause nutritional imbalance in plants. The objective of this study was to evaluate the nutritional status of coffee plants in the Upper Paranaíba region – MG, using the integrated system for diagnose and recommendation (DRIS) to interpret leaf analyses and apply the fertilization response […]

Spatial variability of macronutrient contents in untilled oxisols

Luiz Antônio Zanão Júnior, Regina Maria Quintão Lana, Ednaldo Carvalho Guimarães, Josefa Monteiro de Araújo Pereira


The effectiveness of soil sampling plans may be increased if the spatial variability of soil properties is known and taken into consideration; the factors that determine it should therefore be studied. The objective of this paper was to evaluate the spatial variability of the contents P, K, Ca, Mg, and S in two Oxisols, one very clayey and the other with medium texture, managed in a similar system for eight years, in no-tillage. Soil samples were collected at regular distances […]

Cobalt and molybdenum concentrated suspension for soybean seed treatment

Regina Maria Quintão Lana, Marcos Vieira de Faria, Ivan Bonotto, Ângela Maria Quintão Lana


The concentrated suspension (CS), the basis of Mo trioxide, allows high Mo concentrations and is therefore a technical advance for seed treatment, since it allows the recommendation of the Mo at lower dosage than with the liquid solution formulations (LS). The purpose of this research was to evaluate the efficiency and doses of fertilizer with Mo and Co in concentrated suspension in comparison with liquid solution as well as fertilizers associated with phytohormones, applied in seed treatments, and their effect […]

Spatial variability of soil chemical attributes in areas managed under conventional tillage

Leonardo de Oliveira Machado, Ângela Maria Quintão Lana, Regina Maria Quintão Lana, Ednaldo Carvalho Guimarães, Carla Virgínia Ferreira


The spatial variability of soil chemical attributes was evaluated in a commercial plantation under conventional soil tillage in Uberlândia, state of Minas Gerais, Brazil, in 2004. The sampling grid was the Santa Rosa Farm, where the soil is classified as very clayey Red Latosol (680 g kg-1 clay). The objective was to evaluate the spatial distribution and dependence of the soil chemical attributes in a plantation under conventional soil tillage. For this purpose, soil data were collected from a grid […]