9 research outputs found
Recommended from our members
Consumptive Water-Use Efficiency of Alfalfa Grown Under Three Irrigation Regimes
This item is part of the Arizona Land and People (formerly Progressive Agriculture in Arizona) archive. It was digitized from a physical copy provided by the College of Agriculture and Life Sciences at The University of Arizona. For more information about this periodical, please email CALS Publications at [email protected]
Recommended from our members
Horticultural Survivors of a Southwestern Arizona Ghost Town
Desert Plants is published by The University of Arizona for the Boyce Thompson Southwestern Arboretum. For more information about this unique botanical journal, please email the College of Agriculture and Life Sciences Publications Office at [email protected]
Recommended from our members
Germination and Respiration of Cotton Seed Produced in Arizona
The germination percentage and seedling respiration were evaluated on 11 cultivars of Cotton produced in Arizona. Respiration rates of 5-day old seedlings ranged from 6.0 to 16.9 mg /g⁻¹ hr⁻¹ for DP -5690 and KC-311, respectively. Germination percentage ranged from 31 to 87% for KC-311 and DP-51, respectively. A significant negative correlation (r = -.90) between respiration rates and the germination percentage indicates that seed quality is closely associated with early seedling metabolic rates
Recommended from our members
Mineral and Protein Contents of Blue Grama and Western Wheatgrass
Mineral and crude protein contents of blue grama and western wheatgrass were influenced by stage of maturity and precipitation at the Archer Substation near Cheyenne, Wyoming during the growing season in 1965. Mineral and crude protein levels of the two grasses generally declined with maturity./Este estudio se llevó a cabo en la Subestación de ARCHER cerca de Cheyenne, Wyoming, EUA. El contenido de proteína de cada especie declinó generalmente con el desarrollo. Sin embargo, el navajita azul mostró variaciones en el contenido de proteína por el crecimiento nuevo después de las lluvias aún durante el otoño y después de algunos días con heladas. Se observó un aumento rápido en el contenido de proteína con el crecimiento nuevo pero éste no ocurrió para el Western Wheatgrass. A mediados de agosto el contenido de fósforo en ambas especies declinó por abajo de los requisitos alimenticios dados por el National Research Council (NRC). Esto sugiere la necesidad de empezar la suplementación de fósforo en agosto. El contenido de cobre en el mes de julio para ambas especies estuvo abajo de los requisitos alimenticios del NRC, pero los borregos no mostraron síntomas de deficiencias. Cada especie tuvo bastante calcio, manganeso, magnesio y hierro para toda la estación de pastoreo.This material was digitized as part of a cooperative project between the Society for Range Management and the University of Arizona Libraries.The Journal of Range Management archives are made available by the Society for Range Management and the University of Arizona Libraries. Contact [email protected] for further information.Migrated from OJS platform August 202
Recommended from our members
Water Stress Indices for Research and Irrigation Scheduling in Pearl Millet
The capability to measure the magnitude of water stress in plants is useful for precision irrigation scheduling and other purposes. This paper reports an evaluation of leaf (TL) and canopy (Tc) temperatures, leaf minus air (TL -Ta) and canopy minus air (Tc -Ta) temperatures, and leaf water stress index (LWSI) and crop water stress index (CWSI) in detecting stress in pearl millet (Pennisetum americanum (L.) Leeke) over two growing seasons. Baselines which were used to compute LWSI and CWSI were obtained. The upper and lower baselines for the Tc data, respectively, were Tc -Ta = 4.10 C and Tc -Ta = 3.87- .2001VPD where VPD is vapor pressure deficit in mbars. For the TL data, the upper and lower baselines, respectively, were TL -Ta = 1.97oC and TL -Ta = 1.308- .03006VPD. Tests against photosynthesis, transpiration, and grain yield showed that LWSI and CWSI are better indices of stress than TL -Ta, Tc -Ta, TL, Tc, or Ta. Average seasonal LWSI and CWSI ranged from approximately 0.03 for non- stressed to 0.80 for stressed plants. The reliability of LWSI and CWSI to detect stress and their relation with grain yield suggested the possibility of using these indices for irrigation scheduling decisions