EFFECT OF PLOWING AND IRRIGATION SCHEDULING ON SEASONAL WATER CONSUMPTION, YIELD AND ROOT DISTRIBUTION OF MUNG BEAN UNDER SURFACE AND DRIP IRRIGATION

Abstract

Two field experiments were carried out in the feed crop studies station of the Ministry of Agriculture - Haditha agriculture division located in the village of Sakran - Haditha district 260 km west of Baghdad. The location lies on longitude 42° 22' 21'' east and longitude 34° 08' 23'' north, and 80 m above sea level, On the ground dimensions (21 × 30 m) for each experiment, during the autumn season 2018. The aim of this study is to find out the role of soil surface crusting and its relationship with tillage pattern, irrigation interval and its relationship with soil moisture content, productivity of mung bean, under surface and drip irrigation methods. The treatments of each experiment were distributed individually using Split-Plot Design, with three replications. Treatments were distributed randomly, with each experiment included two experiments on six treatments using zero tillage mode T0, minimum tillage T1 and conventional tillage T2 and two irrigation intervals are two days I1 and four days I2. The results showed superiority of seasonal water consumption values for both irrigation methods when a comma spacing irrigations four days (I2) it reached 403.51 mm and 207.058 mm for the methods of surface irrigation and drip irrigation respectively, T1I1 treatment was superior over similar surface irrigation treatments in grain yield, where the grain yield of 2.52 t ha-¹, T2I1 treatment also was superior in grain yields, reaching to 1,745 t ha-1, when drip irrigation method was used, The results showed that the longest height and the highest dry root weight was for T0I2 treatment reached to 0.33m and 14 gm, respectively when drip irrigation method was used, while the root length for the T1I1 treatment was 0.29 m and the highest dry root weight of 13 g was for T2I1 treatment when drip irrigation method was used also, The water use efficiency by using drip irrigation method was superior by 1.408 kg m-3 for T2I1 treatment and the highest water use efficiency was 1.11 kg m-3 for T1I1 treatment when surface irrigation method used.