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2016
Crops respond to planting density modifying the characteristics of individual plants by changing the number and size of their organs. The density response can be described mathematically by the “Law of Reciprocal Yield”. Under very high density mortality of individuals occurs and is often more pronounced when environmental conditions are more suitable (
Francisco J. Villalobos +2 more
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Crops respond to planting density modifying the characteristics of individual plants by changing the number and size of their organs. The density response can be described mathematically by the “Law of Reciprocal Yield”. Under very high density mortality of individuals occurs and is often more pronounced when environmental conditions are more suitable (
Francisco J. Villalobos +2 more
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Density Determination in Plant Communities
Oikos, 1958In an earlier paper by the former of the present authors (BOCHER, 1935), a modification of Raunkier's method of frequency determination was described. This modification made it possible to evaluate the density of shoots or individuals in plant communities.
Tyge W. Böcher +2 more
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Importance of plant architecture and plant density for rose crop performance
Journal of Horticultural Science, 1997SummaryThe 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, 2009The 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 +4 more
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Agronomic Responses of Corn to Planting Date and Plant Density
Agronomy Journal, 2011Corn (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, 2011Density-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 +3 more
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Plant Density and Soybean Yield
Crop Science, 1988The 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), 2001The 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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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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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, 1983From 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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