Showing papers in "Agricultural Water Management in 1995"

TL;DR: In this article, the root mean square error (RMSE) and mean bias error (MBE) were combined with the t-statistic for the evaluation and comparison of evapotranspiration computing models.

TL;DR: In this paper, the FAO-24 radiation and Penman-Monteith methods were compared for estimating reference crop evapotranspiration (ETo) in 16 Australian locations with a wide range of climate conditions.

TL;DR: In this article, the influence of improved subsurface drainage (IMP) on soil erosion, phosphorus losses and nitrogen leaching was investigated. But the results were limited to a small portion of the total runoff.

TL;DR: In this paper, the authors developed a new procedure for using the reflectance-based crop coefficient in irrigation scheduling and present results of simulations comparing different basal crop coefficient (Kcb) curves for corn to evaluate their effects on estimated crop evapotranspiration.

TL;DR: Water use efficiency (WUE) and yield of wheat were determined in a field experiment using different irrigation waters, with and without nitrogen fertilizer on a sandy to loamy sand soil during 1991–1992 and 1992–1993 and it was concluded that application of 150–225 kg N ha−1 for well water irrigation and 75–150 kg N £1 for aquaculture effluent irrigation would be sufficient to obtain optimum grain yield and higher WUE of wheat in Saudi Arabia.

TL;DR: In this article, the authors used the Christiansen uniformity coefficient (CUC) and a parameter describing the sensitivity of crop yield to water deficits obtained from empirical relationships between evapotranspiration and crop yield for determining optimum irrigation amounts for corn at Cordoba (Spain) under sprinkler irrigation.

TL;DR: The major factors influencing dissolved nitrogen concentrations in upland streams are reviewed in this paper, where the authors show that landuse change such as agricultural improvement of acid grassland, afforestation with exotic conifers and forest harvesting can increase nitrogen concentrations substantially.

TL;DR: In this paper, the authors investigated the effect of soil salinity on the survival and growth rate of Eucalyptus globulus at five sites in south-western Australia and found that E. globulus up to 14 years old were adversely affected by continuing rises of the watertable and increased salt concentrations around the roots.

TL;DR: A field experiment was conducted with Bergamot mint ( Mentha citrata Ehrh) var. Kiran at Lucknow, India in 1992 and 1993 under four soil moisture regimes (0.6, 0.9, 1.2 and 1.5 irrigation water: cumulative pan evaporation (IW:CPE) ratio) and four levels of nitrogen (0, 80, 160, 240 kg ha −1 ).

TL;DR: In this paper, the effects of water stress occurring at various growth stages during the reproductive cycle of grain sorghum were evaluated in open field conditions under a Mediterranean climate, and it was observed that the highest stomatal conductance occurred in correspondence with leaf water potential ( Ψ values higher than −1.5 MPa).

TL;DR: In this paper, the water consumptive use of eggplant, hyb. Delica, grown in unheated greenhouse was determined using tensiometers, when soil water potential was maintained at values higher than −20 KPa, ranging from 0.5 to 4.5 mm day−1, with a whole season irrigation requirement corresponding to 380 mm.

TL;DR: In this article, a semi-permanent plastic mulch system was proposed to increase maize yields in semi-arid regions of Mexico, which combines improved water management, decreased risk of soil erosion, higher yields, and improved sustainability.

TL;DR: In this paper, a soil model for an intensively managed willow stand on clay soil was applied to other willow stands on sandy, clay and organic soils in south-western Sweden.

TL;DR: In this article, the effects of a crop and of crop management on this water loss from the soil have been estimated in the past using combinations of field measurement and simple models, but there are inconsistencies in the conclusions reached.

TL;DR: In this paper, a series of trials were conducted over a period of three growing seasons in the Negev desert highlands of Israel to determine optimal conditions for irrigation of processing tomatoes (cultivar M82-1-8) planted on a sandy soil.

TL;DR: A complete hydrodynamic furrow irrigation model (TRIDISUL) with two-dimensional infiltration is presented and applied to blocked furrows as mentioned in this paper, which allows the simulation of the interactions between the height of the water above the furrow bed and soil water movement during the advance, supply, recession and redistribution phases.

TL;DR: In this article, a 1 ha experimental plot was used for this purpose, which was situated within an area of the Guadalquivir river marshes being used for standard agricultural practices, equipped with a drainage system of ceramic pipes buried 1 m deep and spaced 10 m apart, ending at an open ditch collector which is perpendicular to them.

TL;DR: In this article, a function to predict LAI and ground cover under different soil moisture conditions based on estimated evapotranspiration (ET) was developed to predict the crop canopy decrease with increased soil moisture stress.

TL;DR: The use of the Southern Oscillation Index (Sol) for rainfall prediction and subsequent management of water for rainfed crop production in Ghana was explored in this article, where five sites were selected to represent the major vegetation zones in Ghana, three in the south and two in the north.

TL;DR: In this paper, the Debre Zeit Station cereals (wheat and maize) and forage legumes (lablab, cowpea, vetch and clover) were grown as sole crops and as cereal/forage combinations on the broadbeds separated by drainage furrows (BBF).

TL;DR: In this paper, a methodology for choosing an appropriate water distribution policy in public irrigation projects considering both objectives of equity and efficiency is described, and a simulation model is employed to evaluate the consequences with respect to efficiency and equity measures.

TL;DR: In this article, critical salt coagulation concentrations (CCCs) were determined at constant SAR 5, 10, 15, or 20 for clay fractions of a semiarid surface sample of the Muaq'qar soil (fine, mixed thermic, Typic Calciorthid) and for turbid runoff rain water, containing clay particles, which was generated from the same area.

TL;DR: In this article, the effect of fallowing on potential recharge to groundwater was investigated in Wimmera and Mallee regions of north-west Victoria, Australia, where two common but distinct soil types were investigated, a grey self-mulching clay (chromic vertisol) and a brown solonised soil (calcic xerosol).

TL;DR: In this article, the daily changes in field water table depths were used to evaluate the actual evapotranspiration for sugarcane grown in the Histosols of the Everglades Agricultural Area (EAA) in south Florida.

TL;DR: In this article, a model of water movement in soil during furrow irrigation using Richards' equation in its bidimensional form is presented and tested for two types of soil and short closed furrows.

TL;DR: In this article, a simulation model for acid sulphate soil was developed to predict the effects of water management on soil and water quality in acid sulfate soil areas and evaluated six different water management strategies for the Barambai area in South Kalimantan, Indonesia.

TL;DR: In this article, an equidimensional shrinkage model is used for calculating water contents, which is based on the hypothesis that structural pores (which were assumed to remain rigid during the structural shrinkage phase) become constricted in proportion to shrinkage.

TL;DR: In this article, a multi-specied Eucalyptus tree plantation was established in 1976 on about 12% of a first-order farm catchment above a saline seep, and the main objective was to rank species for water use (as assessed by leaf area and survival) to assist future reclamation of saline seeps in the region.

TL;DR: In this paper, a study was initiated to determine evapotranspiration (ET) and crop coefficient (Kc) of sweet lime and establish the relationship between ET and canopy to air temperature differential (Tc − Ta); °C) under drip irrigation treatments with different amounts of water.