Essay Example on Plant growth is a reflection of utilization of the available resources by the crop

Plant growth is a reflection of utilization of the available resources by the crop The shoot height for the drip irrigation was greater than the surface irrigation treatments Among the drip irrigation growth of rice 98 98 cm recorded significantly higher in DSR with drip irrigation at 20 CPE on 1 day gap followed by 30 CPE on 2 day gap 96 60 cm This indicates higher frequency of irrigation and increased availability of soil moisture under drip irrigation proved higher shoot height of rice In drip irrigation water is provided most efficiently at right time and practically near the root zone of the crop This led to drip irrigation had resulted in more root growth than control plot In the present investigation higher root length was observed in drip irrigation with increasing the irrigation gap indicates root is growing deeper to absorb the water from soil layer when irrigation water not often supplied In general less traffic run with DSR into the field improves the soil aggregation and reduces the compactness of the soil had resulted higher root growth Therefore DSR might have favored the root growth Castillo et al 1998 stated that the roots of direct seeded rice tend to be deeper finer and more extensive as a result these crops consistently perform better under drought condition 

Thus shifting from conventional flooded systems to DSR under surface drip irrigation reduced the water requirement by 13 38 The water requirement was down by 50 by reducing seepage percolation and evaporation losses in view of ET based irrigation scheduling in DSR Medley Wilson 2008 Timely application and precise distribution of water for field preparation and crop growth with drip irrigation would not only save irrigation water but also increase grain yield thus water use efficiency of rice crop could be improved The yield advantage and irrigation saving over DSR in drip irrigation tend to translate into improved water use efficiency Higher WUE 12 69 kg ha 1 mm was possible with irrigation supplied in DSR by tune of 20 CPE on 1 day gap and decreased WUE with increasing duration of drip irrigation gap The WUE was found to be lower in DSR by the tune of 60 CPE on 5 days gap 6 04 kg ha 1 mm Similar results were also observed for fertilizer use efficiency FUE FUE was positively influenced by drip irrigation practices coupled with DSR Among the drip irrigation practices FUE 32 31 kg grain yield kg nutrient applied was highest under DSR along with of drip irrigation 20 CPE on 1 day gap during the years of investigation Lower FUE of DSR with flood irrigation was due to applied fertilizers are more susceptible to denitrification and immobilization loss when water applied after 5 and 7 days of disappearance of surface water Hence precise management of fertilizer and water would be required for efficient use of nutrients in DSR method