TY  - PRO
AU  - Devkota,M.K.
AU  - Devkota,K.P.
AU  - Egamberdiev,O.
AU  - Gupta,R.K.
AU  - Lamers,J.
AU  - Martius,C.
AU  - Sayre,K.D.
TI  - Performance of double rows cotton in ninety centimeter bed under different nitrogen levels
PY  - 2009///
CY  - New Delhi (India)
PB  - World Congress on Conservation Agriculture
KW  - CIMMYT
N1  - Abstract only
N2  - In Uzbekistan, cotton is commonly planted on 90 cm row spacing with higher nitrogen dose i.e. 250 kg ha-1. Since a decade, cotton yield is almost stagnant due to lack of poor crop stand, less nitrogen and water use efficiency and synchronous maturity. Balancing the amount of N with optimum plant population is still a major challenge in this region. Thus, an experiment was conducted to determine the effect of number of rows (single and double rows in 90 cm bed spacing) with three doses of N (50, 125 and 250 kg ha-1) on growth and productivity of cotton in Khorezm region of Uzbekistan during 2008. This experiment was conducted in randomized complete block design with four replications. Together with agronomic traits, normalized difference vegetation index (NDVI) was also measured at various growth stages. Double rows planting in 90 cm beds increased plant population per hectare by 58% (80000 plants ha-1) and produced 15% higher seed cotton yield with 80% harvest in first picking. Among the N doses, double rows cotton with 125 kg N ha-1 resulted in significantly higher (5.33 t ha-1) yield. In double row planting, foliage cover reduced evaporation loss from the soil and increased the water and nitrogen use efficiency
ER  -