5 results match your criteria Agronomy Journal[Journal]

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Assessing inbred-hybrid relationships for developing drought-tolerant provitamin A-quality protein maize hybrids.

Agron J 2020 Sep-Oct;112(5):3549-3566. Epub 2020 Sep 10.

Cocoa Research Institute of Ghana New Tafo-Akim Ghana.

Drought-tolerant early-maturing maize ( L.) inbred lines with high levels of provitamin A (PVA) and quality protein (QPM) are urgently needed for development of superior hybrids to mitigate malnutrition and to intensify maize production and productivity in sub-Saharan Africa (SSA). This study was designed to identify early-maturing inbred lines with combined tolerance to drought, elevated tryptophan, and PVA contents; to examine inbred-hybrid relationships for tryptophan and PVA accumulation; and to select hybrids with outstanding grain yield (GY) performance. Read More

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September 2020

Response of Grain Legumes to Phosphorus Application in the Guinea Savanna Agro-Ecological Zones of Ghana.

Agron J 2018 5;110(3):1089-1096. Epub 2018 Apr 5.

International Institute of Tropical Agriculture, Nairobi, Kenya.

Grain legumes (cowpea, peanut, and soybean) play important roles in household food and income security in smallholder farming systems in the Guinea Savanna agro-ecological zones of Ghana. However, yields are low, rarely exceeding 600 kg ha, prompting the need to evaluate responses of grain legumes to P fertilizer applications for two seasons. Conducting P studies is critical to help farmers adopt economic-based recommendations. Read More

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Wheat response to differences in water and nutritional status between zeoponic and hydroponic growth systems.

Agron J 2000 Mar-Apr;92(2):353-60

Lyndon B. Johnson Space Center, NASA, Houston, TX 77058, USA.

Hydroponic culture has traditionally been used for controlled environment life support systems (CELSS) because the optimal environment for roots supports high growth rates. Recent developments in zeoponic substrate and microporous tube irrigation (ZPT) also offer high control of the root environment. This study compared the effect of differences in water and nutrient status of ZPT or hydroponic culture on growth and yield of wheat (Triticum aestivum L. Read More

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December 2000

Regression models for calculating gas fluxes measured with a closed chamber.

Agron J 1997 Mar-Apr;89(2):279-84

USDA-ARS, North Central Soil Conservation Res. Lab., Morris, MN 56267, USA.

Portable closed chambers provide a valuable tool for measuring crop photosynthesis and evapotranspiration. Typically, the rates of change of CO2 and water vapor concentration are assumed to be constant in the short time required to make the closed-chamber measurement, and a linear regression model is used to estimate the CO2 and H2O fluxes. However, due to the physical and physiological effects the measurement system has on the measured process, assuming a constant rate and using a linear model may underestimate the flux. Read More

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September 1998

Soybean stem growth under high-pressure sodium with supplemental blue lighting.

Agron J 1991 Sep-Oct;83(5):903-6

NASA Biomedical Operations and Research Office, Kennedy Space Center, FL 32899.

High-pressure sodium (HPS) lamps are popular for plant lighting because of their high energy conversion efficiencies. Yet their spectrum has very little blue light (BL), which may cause undesirable morphological responses. To study this, McCall' soybean [Glycine max (L. Read More

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