Useful Fertilizer Use — Fertigation: by Doctor Bill Segars

SECTION ARTICLES: • Advantages • Garden soil Chemistry • Water Quality Concerns • Fertilizers for Injection In to Irrigation • Use Fertigation Properly and According to Regulations • Irrigation Arranging & Fertigation • Additional Important Factors to Consider When ever Fertigating

Fertigation is defined as the usage of nutrients using an irrigation system simply by introducing the nutrients in to the water streaming through the program. The first reported application of commercial fertilizer through a sprinkler irrigation program was in 1958. Today, all of us routinely provide fertilizer solutions and suspensions into irrigation systems by way of calibrated injections pumps that insure precision over both equally space and time.

Fertigation has increased dramatically in the past 15 years, especially for sprinkler and drip systems. For drop systems, the expansion is usually in horticultural and high value crops. In agricultural areas with decreasing water products, drip systems have also elevated. With increased water sources, a matching increase in fertigation has taken place. It will eventually continue to expand since such Figure 10. 1 Cost to do business sprinkler water sources system. devices result in significantly less water usage and better uniformity and lend themselves to the approach much more readily than the much less water-efficient and non-uniform flaw and flood systems staying replaced. Successful fertigation needs knowledge of particular plant attributes such as the best daily chemical consumption level and root distribution inside the soil. Nutritional characteristics such as solubility and mobility are important and irrigation water quality factors just like pH, mineral content, salinity and nutritional solubility has to be considered. The need for irrigation is the main factor in fertigation because the water sources system is generally installed to supply water. A chance to fertigate is definitely an added advantage. This section will address issues that must be considered to obtain maximum benefits when fertigating.

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Efficient Fertilizer Work with — Fertigation: by Dr . Bill Segars

Figure 12. 2

Farmers often plant vegetables below plastic mulch and fertigate using drip/trickle irrigation.

Garden soil Chemistry

Popping and fertilization history and basic dirt chemical real estate also need to be regarded as prior to fertigation. Soil tests by the method recommended in a specific location is the best way to assess current fertility requirements. Particular interest should be provided to soil ph level and its adjustment to an appropriate range for the plant to be grown. Proper ph level can have a wonderful effect on the of left over nutrients in soil as well as those added via fertigation. Any required soil ph level adjustments needs to be made employing conventional use techniques. Fertigation is not really utilized to alter soil pH's. Cation exchange capacity (discussed in The Soil Defined) is an important consideration in determining the number of cations which will be retained during fertigation. In order to maintain an acceptable concentration of cations in solution, a soil which has a low CEC must have it is cations substituted via fertigation more often than one with a relatively excessive CEC, that may hold a greater quantity of ions. Since nutrients are easily added with fertigation, it is the majority of practical on sandy, droughty soils with low CEC. These soils need frequent irrigation and nutrient renewal. Previous chapters in this book have explained soil movement of nutritious elements the moment applied simply by conventional fertilization methods. Since fertigation does not negate traditional soil hormone balance, fertigated nutrition behave similarly to conventionally used soluble nutrition followed by rain fall or irrigation. A reminder -- only little quantities of nutrients utilized by a great overhead sprinkler system happen to be absorbed by foliage. There is some matter that seeing that nitrate nitrogen (NO3-N) is highly mobile, it might leach beyond daylight hours root system and reach groundwater....

Links: to additional sections of the Efficient Fertilizer Use Manual History • Mey • Soil • pH • Nitrogen • Phosphorus • Potassium • Secondary • Micronutrients • Fluid-Dry • Sampling • Testing • Site-Specific • Tillage • Environment • Appendices • Contributors

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