EFFECT OF ORGANIC MANURE AND NITROGEN LEVELS ON THE YIELD AND QUALITY OF TWO JERUSALEM ARTICHOKE CULTIVARS IN THE . NEWLY RECLAIMED AREAS

Abstract

The present study was carried out to investigate the effect of both N fertilization and poultry manure levels on the growth, productivity plant, tuber chemical constituents and storability of the tubers of two jerusalem artichoke cultivars the "Local and Fuseau". Field experiments were carried out in the summer seasons of 2000 and 2001 under sandy soil condition at the farm of Horticulture Research Station, at Ali Moubarak village, South El -Tahrir, El- Bostan region. The experimental design used was split- split plot in randomized 1. complete block design with three replications. Also, four nitrogen fertilization levels of ammonium sulphate i.e, 50, I 00, !50 and 200 kgN/ fad. were tested, each level ofN fertilizer was divided into three parts and added at30, 60 and 90 days after planting. Poultry manure

,,. .

rates 0, 5, and 10m3

fad. were added during soil preparation.