Interaction of Factors Affecting Yield

Clements, Harry F.

doi:10.1146/annurev.pp.15.060164.002205

Cited by 40 publications

(14 citation statements)

References 66 publications

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“…Thus, it becomes apparent that CO9. from the root zone can diffuse to tops, where there is frequently a deficiency 5 Little research has been undertaken on the effects of soil CO2 concentration on inorganic nutrient uptake and translocation in plants. G r a b l e and D a n i e l s o n 7 suggested that CO2 may interact with N H + or other ions in solution b y means not exactly duplicated in soil.…”

Section: Introductionmentioning

confidence: 99%

Soil carbon dioxide and mineral accumulation in citrus seedlings (Citrus sinensis var. Bessie)

et al. 1971

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SUMMARYThis experiment was conducted in a greenhouse to study the influence of soil CO2 differential treatments on plant response, concentrations of nutrients in soils and plants, and total nutrients per plant (Citrus sinensis var. Bessie).Higher levels of soil CO2, applied to the roots, significantly increased the amount of dry weight per seedling, the height of seedling, and decreased the concentrations of N, P, Ca, Mg, and Mn in the tops. The dry weight of roots supplied with high soil CO2 was decreased, while the concentrations of Mg and Mn were increased. Concentrations of N, P, K, and B in the roots were also reduced due to high level of soil COs. Only total K and Mg per plant were increased with an increased soil COs supply. No significant interactions were found between the soil COs treatments and years of experiment.

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Section: Introductionmentioning

confidence: 99%

Soil carbon dioxide and mineral accumulation in citrus seedlings (Citrus sinensis var. Bessie)

et al. 1971

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“…Since environmental factors have a direct influence on the rate of leaf develop• ment, it is desirable to have a system for quantification of leaf development that is integrated with "total" plant development. The potential utility of correlating the rate of leaf emergence with various environmental factors has been discussed by Clements (1964). Approximate developmental curves for wheat at different dates were published by Schlehuber (1967, p. 146).…”

mentioning

confidence: 99%

Visual Quantification of Wheat Development¹

1973

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Changes in the morphology of winter and spring wheat (Triticum aestivum L. em. Thell.) were quantified in a manner to provide a continuous numerical expression of plant development during the formative growth period. The notation system makes use of the regular appearance of leaves at the growing point. Each new leaf represents a unit of development. After the flag leaf has emerged the remaining visible morphological development is divided into four additional units. The growth units are subdivided into decimal fractions beginning with the appearance of each leaf or subsequent unit and ending with the appearance of the next. The daily status or stage of plant development is designated as the total number of units plus the fractional portion of the next unit. The rate of development is determined by subtraction of the previous stage of development from the current stage. Statistical analyses were made to determine the validity of the system with respect to uniformity of designated development units. The system of observation provides a convenient and sensitive method for objectively documenting the status of development throughout the season, or for evaluating the growth response to various treatments or environmental conditions.

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“…Hence, adequate or safe levels of nutrient concentration are often keyed to a well-defined stage of plant develop• ment, for example, early flowering or the number of days the level remains below a specified concentration (Burhan and Babikir, 1968;MacKenzie et al, 1963). Carter, Jensen, and Bosma (1971) developed a model for characterizing the declining nitrate-N level in petioles of sugar beets (Beta saccharifera) with time, and Clements (1964) used a multiple-regression model to establish "normal" N levels in sugarcane (Saccharum otficinarum) leaf sheaths by correcting for actual sheath moisture and age.…”

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confidence: 99%

A Model for Estimating Desired Levels of Nitrate‐N Concentration in Cotton Petioles¹

Grimes¹,

Dickens²,

Yamada³

et al. 1973

Agronomy Journal

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Field studies were conducted on two widely different soils over a 3‐year period in a semiarid irrigated region to establish functional relations between responses of cotton (Gossypium hirsutum L.) plants and the major production input factors: water, nitrogen, and plant density. The nitrate‐nitrogen concentrations of petioles from the most recently matured leaves were influenced by N‐fertilization level, time of sampling in the season, and water management. Plant population did not alter the nitrate‐N levels of petioles. High concentrations were associated with large amounts of N applied in side‐dress soil applications. On a fine‐textured soil with a high water‐retention capacity N side‐dressed after emergence was not taken up by the plant until the first irrigation was added. Concentrations of nitrate‐N in petioles at critical times in the season were characterized by a 2nd‐degree polynomial model having water and nitrogen quantities as independent variables (0.54≤2R≤0.94). A second model was subsequently developed that incorporated time as an independent variable in addition to water and nitrogen quantities. Using a yield equation and model 2, a procedure was developed that enables time‐dependent “desired” levels of plant nutrient concentrations to be established that are dependent on commodity price and production factor costs. This model is sensitive to changing price levels for commodity and/or production factors.

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Interaction of Factors Affecting Yield

Cited by 40 publications

References 66 publications

Soil carbon dioxide and mineral accumulation in citrus seedlings (Citrus sinensis var. Bessie)

Soil carbon dioxide and mineral accumulation in citrus seedlings (Citrus sinensis var. Bessie)

Visual Quantification of Wheat Development¹

A Model for Estimating Desired Levels of Nitrate‐N Concentration in Cotton Petioles¹

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Interaction of Factors Affecting Yield

Cited by 40 publications

References 66 publications

Soil carbon dioxide and mineral accumulation in citrus seedlings (Citrus sinensis var. Bessie)

Soil carbon dioxide and mineral accumulation in citrus seedlings (Citrus sinensis var. Bessie)

Visual Quantification of Wheat Development1

A Model for Estimating Desired Levels of Nitrate‐N Concentration in Cotton Petioles1

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Product

Resources

About

Visual Quantification of Wheat Development¹

A Model for Estimating Desired Levels of Nitrate‐N Concentration in Cotton Petioles¹