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- Title
I.1. NITROGEN FERTILIZER AND HUMIC ACID EFFECTS ON MAIZE PRODUCTIVITY.
- Authors
EL-MEKSER, HODA KH. A.; GHAREEB, ZEINAB E.; HODA, E. A. IBRAHIM
- Abstract
A two-year field trial was conducted at Ismailia (sandy soil) and Gemmeiza (clay soil) Research Stations, in a split plot design with three replicates during 2012 and 2013 growing seasons using maize hybrid single cross 166. The objective of this research was to find out the impact of four humic acid (HA) treatments (control, soaking, spraying, and soaking/spraying) applied under four N fertilizer levels (0, 60, 90 and 120 Kg fed.-1) on maize yield and its components. Data recorded from Gemmeiza site had higher values than those from Ismailia. Results from locations and seasons indicated that grain yield increased with increasing N rates. Moreover, these results suggest that the optimum N rate was 120 kg N fed.-1 at both locations. However, the 4th treatment (Soaking/Spraying) recorded the highest values for yield and most of its traits (ear length, kernels weight, kernels per ear and grain yield) at the two locations across seasons. Generally, grain yield was increased with increasing N up to 120 kg fed.-1 with soaked/sprayed seed at the two locations. Application of high nitrogen rates decreased nitrogen use efficiency (NUE) at Gemmeiza under all humic treatment Results confirmed that grain yield response index was higher at Gemmeiza than that at Ismailia.
- Subjects
NITROGEN fertilizers; HUMIC acid; CORN yields
- Publication
Egyptian Journal of Agricultural Research, 2015, Vol 93, Issue 2(A), p1
- ISSN
1110-6336
- Publication type
Article