|Author:||Mathew, A. C. ; Senthilvel, S.|
|Book Group Author:||NA|
Two automatic surge irrigation systems, one based on a soil moisture sensor and the other sequentially operated, were fabricated and field tested, and their efficacies were compared with that of a manual surge irrigation and conventional furrow irrigation. The experiment was carried out at Tamil Nadu Agricultural University, Coimbatore in India by providing irrigation to maize in two field trials, i.e., one trial each during two consecutive years. The treatments used in the study were: (T1) manual furrow irrigation; (T2) manual surge irrigation; (T3) automatic surge irrigation (sequential operation); and (T4) automatic surge irrigation (based on soil moisture tension). Both the automatic irrigation systems performed consistently and accurately. Grain and stover yield and water use efficiency of the automatic irrigation system were on a par with the manual surge irrigation. It saved 7% of water in the first trial and 13% of water in the second trial compared to conventional furrow irrigation. Corresponding increase in water use efficiencies were 19 and 27%, respectively. The sequentially operated automatic irrigation system over-irrigated the crop since irrigation was given without considering the prevailing soil moisture tension in the crop root zone. Compared to the conventional furrow irrigation, it provided 15 and 34% more irrigation during first and second field trials respectively. Water use efficiency for the first trial crop was on a par with that of conventional furrow irrigation, whereas it showed a reduction of 11% for the second trial crop. Economic analysis of the irrigation systems showed that there was a saving of 20 and 39% respectively for crops irrigated with automatic surge irrigation based on a soil moisture sensor for both the field trials compared to that of manual furrow irrigation. However, savings were considerably less, 15 and 31% respectively for crops irrigated with sequentially operated surge irrigation for both the trials. Manual surge irrigation recorded maximum savings, 52 and 59%, respectively.
|Pages:||19 - 27|
|Journal:||International Agricultural Engineering Journal|
automatic irrigation systems, crop yield, economic analysis,furrow irrigation, maize, maize stover, performance tests, plant waterrelations, soil water content, surge irrigation, water conservation,water management, water use efficiency, India, Tamil Nadu, Zea mays,Zea, Poaceae, Cyperales, monocotyledons, angiosperms, Spermatophyta,plants, eukaryotes, South Asia, Asia, Developing Countries, Commonwealthof Nations, India, corn, Madras, water resource management, AgriculturalEconomics (EE110), Input Utilization (Microeconomics) (EE145), FieldCrops (FF005) (New March 2000), Plant Production (FF100), Soil WaterManagement (Irrigation and Drainage) (JJ800) (Revised June 2002)[formerly Soil Water Management], Agricultural and Forestry Equipment(General) (NN400)