12 documents found, page 1 of 2

Initial growth of four tree species at different spacings

The objective of this paper was to evaluate the initial increase of the height and diameter of the collum of the species Acacia mearnsii De Willd, Eucalyptus grandis Hill, Mimosa scabrella Benth and Ateleia glazioviana Baill in the spacings 2 x 1m; 2 x 1.5m; 3 x 1m and 3 x 1.5m, with views to the production of wood for energy in cultures of short rotation. An experimental design of randomized blocks was used in...

Expolinear model on soybean growth in Argentina and Brazil

Prever o crescimento e a produtividade das culturas com precisão é uma das principais preocupações das ciências agrícolas. Com esse propósito, modelos mecanísticos de crescimento de culturas têm sido desenvolvidos e testados. A adequação do modelo expolinear de crescimento de culturas foi avaliada para prever as modificações de crescimento de cultivares de soja (Glycine max L. Merrill) de crescimento determinad...

EXCESSO HÍDRICO SOBRE OS COMPONENTES do RENDIMENTO da CULTURA da SOJA

Submitted by Guilherme Lemeszenski (guilherme@nead.unesp.br) on 2013-08-22T18:59:18Z No. of bitstreams: 1 S0103-84782001000100002.pdf: 52801 bytes, checksum: 1b5834635caef6fe642ec4ec71ebcaa4 (MD5); Made available in DSpace on 2013-08-22T18:59:18Z (GMT). No. of bitstreams: 1 S0103-84782001000100002.pdf: 52801 bytes, checksum: 1b5834635caef6fe642ec4ec71ebcaa4 (MD5) Previous issue date: 2001-02-01; Made available ...

Produção e composição química de hortaliças folhosas em hidroponia

O cultivo hidropônico de hortaliças folhosas vem crescendo acentuadamente nos últimos anos, no entanto, pouco se sabe sobre sua composição química, o que é de extrema importância, tendo em vista a mudança de hábito alimentar de uma fração considerável da população brasileira que busca alimentos de qualidade. Por essa razão, as culturas de agrião, chicória, rúcula e alfaces americana (cv. Lucy Brown) e lisa (cv....

Eficiência do uso de água do meloeiro hidropônico

Com o objetivo de avaliar a eficiência do uso de água pelo meloeiro no sistema hidropônico NFT realizaram-se dois experimentos em duas épocas distintas (setembro de 2003 a janeiro de 2004, época I e janeiro a abril de 2004, época II). Os experimentos foram conduzidos em casa de vegetação em área da Universidade Federal de Santa Maria, Santa Maria-RS. As características avaliadas foram: consumo hídrico das plant...

Tests to determine the physiological potential of squash seeds - DOI: 10.4025/a...

This work aimed to determine the efficiency of different tests to access the physiological potential of squash seed lots. Six seed lots were submitted to germination and vigor tests (germination first count; speed of germination; cool germination; accelerated aging; seedling emergence; seedlings growth and dry biomass (root, hypocotyl and total) and plants (root, stem and total length, root, stem, root plus ste...

Relations between the potential and temperature of the corn and sorghum leafs s...

To evaluate the daily behavior of the water potential in corn and of sorghum plants submitted to water stress, relating with the leaf and ambient temperature, were cultivated, in individual pots in greenhouse, five plants of each species. The plants were kept at field capacity until they reached the stage of four leaves. Between that stadium and close to the wilting point the irrigation was suspended and were m...

Plant population and some soil attributes related to corn yield - DOI: 10.4025/...

Studies regarding population and plant spatial distribution are essential for understanding yield crop processes. The goal of this work is to report the possibility of applying georeferenced information as tool mainly for agronomic studies, especially for corn production studies, such as interactions between population and plant spatial distribution and concentration of soil nutrients, maintaining the basic pri...

Evolution and partitionig of dry biomass of muskmelon in hidroponic - DOI: 10.4...

The work were aiming evaluate the influence of intervals between irrigation and fruits densities on evolution and paTrtitioning of dry biomass of muskmelon variety Cantalupensis cultivar Torreon. The treatment tested were constituted in two daily intervals, from 6 to 19 hours, between irrigation (15 min of irrigation in intervals of 15min - T15 and a period of irrigation of 15min and interval of 30min -T30), an...

Transpiração e condutância foliar à difusão de vapor de feijoeiro irrigado em f...