A5000153092- Crop Yield and Soil Fertility
- Irrigation Practices and Water Management
- Soil and Unsaturated Flow
- Plant Water Relations and Carbon Dynamics
- Greenhouse Technology and Climate Control
- Plant nutrient uptake and metabolism
- Climate change impacts on agriculture
- Genetics and Plant Breeding
- Soil Moisture and Remote Sensing
- Rice Cultivation and Yield Improvement
- Soil Carbon and Nitrogen Dynamics
- Groundwater flow and contamination studies
- Plant responses to elevated CO2
- Wheat and Barley Genetics and Pathology
- Plant responses to water stress
- Soil and Water Nutrient Dynamics
- Hydrology and Watershed Management Studies
- Remote Sensing in Agriculture
- Agricultural Economics and Policy
- Tree Root and Stability Studies
- Leaf Properties and Growth Measurement
- Soil Geostatistics and Mapping
- Horticultural and Viticultural Research
- Bioenergy crop production and management
- Soil Mechanics and Vehicle Dynamics
Michigan State University
2002-2021
University of Florida
2005-2016
Rogers (United States)
2016
Agricultural Research Service
1974-2015
Temple College
1980-2013
University of Alabama at Birmingham
2006
Duke University
2006
University of Arizona
1994
J P Kenny
1990-1991
Michigan Department of Agriculture and Rural Development
1990
A model is presented for calculating the daily evaporation rate from a crop surface. It applies to row canopy situation in which soil water supply plant roots not limited and has come into an advanced stage of maturation or senescence. The calculated by adding surface components (each these requiring numbers leaf area index), potential evaporation, rainfall, net radiation above canopy. E s two stages: (1) constant only energy (2) falling movement evaporating sites near controlled hydraulic...
Abstract Accurate evaluation of the soil water reserves available for plant use is vital in developing optimum management crop production marginally dry regions. Laboratory estimates upper and lower limits availability used to calculate reservoir often deviate significantly from measured field. To make a unified broad assessment accuracy laboratory measurements estimating field water, we obtained evaluated comprehensive data base field‐measured reservoir. The limit was taken as content at...
Abstract Irrigation should be scheduled in order to minimize water application while maximizing crop yield, and such judicious watering requires better understanding of how crops respond supply. This field study was initiated determine the influence deficits prior anthesis on growth yield corn ( Zea mays L.) grown a sandy soil. A rain shelter employed provide periods without 21 d 1988 18 1989. Water deficit treatments were begun as eighth or ninth leaf emerged from whorl plants for two...
Abstract Seasonal variation in three plant factors and evaporation rates were determined for dryland cotton grain sorghum central Texas. Plant measured fractional ground cover, dry matter production, leaf area index (LAI). When an adequate supply of soil water was available the rhizosphere, influenced during most first half groiwng season until a “threshold” canopy LAI obtained. A threshold is defined as minumum necessary to obtain 90% potential (E o ) from row crops when s small. The...
Abstract To understand the development of a crop, information is needed concerning dynamics root growth and water uptake. An extendible, 13 mm diam borescope, low light, monochrome video camera, tape recorder were combined into system for in situ observation through 51 inside clear acrylic tubes installed at an angle 30° from vertical. The viewing area was illuminated by two fiber optic light guides variable intensity source. could also be used as access neutron probe to measure uptake same...
Diurnal variations in leaf water potential, diffusion resistance, relative content, stem diameter, temperature, and energy balance components were measured cotton (Gossypium hirsutum L. var. Lankart 57) during drought stress under field conditions. A plot of potential against either content or diameter the 24-hour period yielded a closed hysteresis loop. The relation between cell hydration evaporation is discussed.Despite low soil main root zone, significant plant rates maintained. Root...
Abstract Warming generally leads to increased evaporative demand, altering the amount of water needed for growing crops. For Midwest, some studies have suggested that reaching yield targets by 2050 will not be possible without additional precipitation or large expansion irrigation. Here, we show this claim is supported historical summer climate trends, which indicate warming daily average temperatures largely driven increases in minimum temperatures, while maximum decreased. This has...