11/7/2023 0 Comments Increase phoenix os storage sizeIf the amount of particles within this range is greater than 50 percent, the soil is said to be sandy. Sand is usually defined as particles having a diameter between 0.05 and 1.00 mm ( Figure 1). The distribution of the soil particles according to their size is called the texture. In order to be efficient, the extension workers should receive special training on the irrigation of sandy soils based on a very good knowledge of the local soil conditions. This of course can only be done through an intensive education program of demonstrations, advice, rewards, etc., carried out by a well organized extension service. It is therefore necessary to provide farmers with the knowledge that they need. The human aspect is often unduly disregarded during the planning period whereas it plays a decisive part during the whole lifetime of a project. This may be even more applicable in the case of sandy soils for which irrigation must be handled with special care. The method is still in its initial stages and many developments are expected in the near future.Ī well designed irrigation scheme may not yield the expected returns if water is not managed in the proper way by farmers. Comparative field trials are still few to determine in what proportion these advantages are applicable to large scale irrigation. In fact highly qualified specialists have obtained most of these promising results in experimental conditions. The real success of this new method is based on a certain number of advantages which are claimed by the enthusiastic promoters of the method: water saving, higher yields, utilization of brackish waters, manual labor extremely reduced, reduction in diseases, weed control, etc. Trickle irrigation really started in agriculture less than 10 years ago. Its application at the farm level became more common with the extensive use of polyethylene plastics, which has led to reduced cost and increased acceptability for some crops. Although it had been known for many years, some horticulturists and nursery gardeners mostly used it. The main objective of this chapter is to investigate main soil physical and chemical properties that affect the irrigation water amount and to suggest possible irrigation strategies for sandy soil.ĭrip irrigation is one of the most efficient irrigation methods to be developed. This chapter describes some "best" soil moisture management strategies and monitoring techniques that a farmer should consider in managing irrigation and maintaining soil moisture for optimum crop production and least possible degradation of ground water quality. Delaying irrigation until plant stress is evident can result in economic yield loss. Applying too much water means increased pumping costs, reduced water efficiency, and increased potential for pollutant leaching below the rooting zone and into the ground water. Irrigating sandy soils requires high attention to the timing and amount of irrigation water applied, which are crucial decisions for each operator. The wise use of these resources requires a basic understanding of soil and water as well as the crop itself. Soil is the supporting structure of plant life and water is essential to sustain plant life. Recommendations are also given on proper water management at field level.ĭry land and irrigated agriculture depend on the management of two basic natural resources soil and water. In this chapter a review is made of the physical characteristics and water-soil relationships of sandy soils, as well as various irrigation methods. Irrigation of sandy soils must be considered carefully.
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