Search Results

You are looking at 101 - 110 of 418 items for :

  • "water management" x
Clear All
Full access

Xinjing Qu, Hui Wang, Ming Chen, Jiao Liao, Jun Yuan and Genhua Niu

will help improve the water management of oil tea seedlings. Literature Cited Aim, B. Mahmood, H. 2011 Effect of drought stress and its interaction with ascorbate and salicylic acid on okra ( Hibiscus esculents L.) germination and seedling growth J

Free access

Amanda J. Taylor, R. Thomas Fernandez, Pascal Nzokou and Bert Cregg

United States. Improving our understanding of the physiological mechanisms behind the growth responses to irrigation is important in developing effective water management strategies. Up to 97% of water used by plants is transpired through stomata, and an

Full access

Shixin Deng, Qun Yin, Shanshan Zhang, Kankan Shi, Zhongkui Jia and Luyi Ma

). Quantitative studies of root morphology and distribution characteristics have played a vital role in establishing models of root absorption and transportation of water, improving water management in woodlands and the development of water-saving forestry ( Xi et

Full access

Erin Schroll, John G. Lambrinos and David Sandrock

landmass than any other climate grouping; yet, we have very little information about proper water management for green roofs under these conditions. Despite its rainy reputation, the Pacific northwestern United States is dry through most of the summer. For

Full access

Brian J. Boman

Florida Agricultural Experiment Station Journal Series No. R-10231. This project was supported in part by grants from the Florida Citrus Production Research Advisory Council (FCPRAC) and the St. Johns River Water Management District.

Full access

Y.C. Li, A.K. Alva, D.V. Calvert and M. Zhang

advertisement solely to indicate this fact. This study was made possible by a grant from the St. John's River Water Management District and the South Florida Water Management District.

Free access

John C. Majsztrik and John D. Lea-Cox

, and water application scenarios, which has allowed for numerous insights into how we can reduce N and P loading with reduced nutrient application rates to targeted species in different operations when combined with better water management practices. We

Free access

Eric H. Simonne, Joseph M. Kemble and Doyle A. Smittle

A TurboPascal computer program was developed to calculate daily water budgets and schedule irrigations. Daily water use (di) is calculated as pan evaporation (Ep) times a crop factor (CFi), where i is crop age. The water balance uses a dynamic rooting depth, the soil water holding capacity (SWC) and rainfall data (Ri). di is added to the cumulative water use (Di-1) and Ri is subtracted from Di. An irrigation in the amount of Di is recommended when Di approximates allowable water use. The program cart be adapted to most crop and soil types, and can be used for on-time irrigation scheduling or for simulating water application using past or projected weather data. This program should increase the acceptance of modem scheduling irrigation techniques by farmers and consultants. Additionally, this program may have application in an overall water management programs for farms, watersheds or other areas where water management is required.

Full access

G. Steven Sibbett

Pecan [Carya illinoinensis (Wangenh. K. Koch)] soils in the arid western United States are characteristically high in pH, calcareous, and often saline or sodic. Economic production, when trees are grown in such soils, requires that growers pay particular attention to managing soil chemistry to avoid nutrient deficiencies, toxicities, or water deficits due to soil structural deterioration. Soil-applied acidulents, calcium-containing compounds, and water management are used by growers to manage high pH problems, sodic soil conditions, and salinity.

Free access

F.T. Izuno, R.W. Rice and L.T. Capone

Situated at the northern end of the historical Florida Everglades is the 280,000-ha tract of land called the Everglades Agricultural Area (EAA). This land was diked, canalized, and drained in the early 1900s to encourage the production of primarily sugarcane, vegetables, sod, and rice on its Histosols. The phosphorus in drainage water from the EAA is believed to be causing undesirable changes to the ecosystem in areas subject to legislated environmental protection. Phosphorus (P) load reduction “Best Management Practices” (BMPs) are being developed and implemented in the EAA to reduce agricultural production impacts on the wetland areas. The BMPs can be categorized as fertilizer, water management, or particulate control related, and can be applied effectively across the EAA. Ten farms, representative of the EAA soils, rainfall, crops, farm size, geographic location, and water management practices, were used in the study. The farms were monitored under pre-BMP conditions for 1 to 3 years. By Jan. 1995, seven of the 10 farms were operating under project-designed BMP packages that included only the fertilizer and water management options. Depending on the method used for adjusting for hydrologic variability between years, calculated P load reductions ranged from 25% to 60% between 1994 and 1995.