05) influenced RNPH, but there was no significant difference in other studied traits (Table II).
Root yield and yield components: The highest value of RNPH (135412 roots ha-1) was recorded in the MR treatment, while the lowest value of RNPH (115000 roots ha-1) was recorded in the NT treatment (Table III).
2008), Rashidi and Khabbaz (2009) that tillage practices can be associated with improved soil physical and mechanical properties (increased pore space, decreased bulk density, increased moisture preservation and decreased penetration resistance), enhanced soil structure, better seed- soil/root-soil contact and superior weed control, which positively influence RNPH and consequently root yield and sugar yield of sugar beet.
1992), Borresen (1993), Carter & Ivany (2006) and Ozpinar (2006) that conservation tillage methods may be associated with worse soil physical and mechanical properties (decreased pore space, increased bulk density, decreased moisture preservation and increased penetration resistance), poorer seed/root-soil contact and raised diversity of weed species and population which negatively influence RNPH, resulting in decreased RY and as a result SUGY of sugar beet.
05) affected RNPH, but there was no significant difference in RY, SUGY, RODM, ROTL and RIMD.
7 Loam Table 2: Analysis of variance for root yield and yield components of sugar beet under different tillage methods (mean of 2008 & 2009) Mean square Source of variation Df RY RNPH SUGY Replication 3 257.