Results 261 to 270 of about 5,470,722 (305)

Importance of plant architecture and plant density for rose crop performance

Journal of Horticultural Science, 1997
SummaryThe relationships between plant architecture and flower production of rose were studied for a cropping period of 2.5 years. Four types of plants, varying in number of basal shoots and their architecture were created, which were combined with three plant densities (7.7–11.6 and 17.4 plants per m2).
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PLUG PLANT FERTILIZATION AND PLANTING DENSITY AFFECT ONION PRODUCTIVITY IN SICILY

Acta Horticulturae, 2009
The aim of this study was to evaluate the effects of different planting density and different levels of plug plant fertilization on onion production in Sicily. Onion landrace ‘Bisacquino’ was sown in the first week of January 2006 in a unheated greenhouse in polystyrene plug trays.
VETRANO, Filippo, IAPICHINO, Giovanni, BERTOLINO, Massimo, FASCELLA, Salvatore, INCALCATERRA, Giovanni   +4 more
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Agronomic Responses of Corn to Planting Date and Plant Density

Agronomy Journal, 2011
Corn (Zea mays L.) grain yield is closely related to plant density and is typically maximized in the northern Corn Belt when planting occurs in late April. However, spring rainfall events often result in wet soil conditions that delay planting. From 2008 to 2010, experiments were conducted at two locations in southern Minnesota to determine whether the
Ryan J. Van Roekel, Jeffrey A. Coulter
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Density‐Structured Models for Plant Population Dynamics

The American Naturalist, 2011
Density-structured models are structured population models in which the state variable is the proportion of populations or sites in a small number of discrete density states. Although such models have rarely been used, they have the advantage that they are straightforward to parameterize, make few assumptions about population dynamics, and permit rapid
Robert P, Freckleton, William J, Sutherland, Andrew R, Watkinson, Simon A, Queenborough   +3 more
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Plant Density and Soybean Yield

Crop Science, 1988
The spacial distribution of plants in a crop community is an important determinant of yield. However, the mechanisms responsible for the observed responses to changing plant density are not well understood. Field experiments utilizing a systematic design that made it possible to evaluate a wide range of plant densities in a single experiment were ...
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Predictive control of a low density polyethylene plant

2001 European Control Conference (ECC), 2001
The paper aims to present the possibilities of controlling a multizone tubular reactor for producing low-density polyethylene using the Model Based Predictive Control (MBPC) strategy, specifically Extended Predictive Self-Adaptive Control (EPSAC) approach.
M. Anghelea, Robin De Keyser
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Plant Density and Crop Yield

Applied Statistics, 1970
In investigations into the relationship between mean plant density and crop yield, an inverse power response curve has often been used. In this paper the theoretical properties of a family of these curves are examined, including situations where two or more such relationships are being compared. Methods of fitting these response models are given.
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Crop Yield and Planting Density

Annals of Botany, 1983
From the established responses of plants to photosynthetic activity and to the availability of nutrients in the soil, a crop yield : planting density response equation is derived with parameters that are of biological significance. The relationship between crop yield, Y (kg m~2) and planting density, p (number of plants m~2), is of considerable ...
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Applications of Density Sensor in Power Plant Desulphurization

2008 IEEE Pacific-Asia Workshop on Computational Intelligence and Industrial Application, 2008
7828 density sensor is a powerful tool in the desulphurization process in power plants. The characteristics, operation, electrical wiring, installation as well as the configuration software are introduced for this density sensor. It has been demonstrated that 7828 density sensor has met the comprehensive technological requirements in power plants.
Liping Dai, Yunge Zhao
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Flowering plant density and pollinator visitation in Senecio

Oecologia, 1983
It has commonly been assumed that pollinator energy intake increases with flowering plant density, and visitation to flowers should therefore be higher in denser stands. I therefore investigated the relationship between flight distance and flight time for bumblebees and butterflies foraging on Senecio integerrimus and S. crassulus in the Colorado Rocky
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