Effects of nitrogen forms on yield of sorghum (Andropogen sorghum) and their residual effect on a following wheat crop on a sandy soil. [electronic resource]

Includes bibliographic reference

Two field experiments were carried out on a sandy soil at Ismailia Agric. Res. Station, lsmailia governorate
Egypt in a split plot design. The first experiment was during summer 2016 on sorghum (Andropogen sorghum, v.
Dorado). The main plots contained treatments of fertilizer nitrogen forms, i.e. Ammonium Nitrate 33%N, Urea
46%N Urea Formaldehyde 40%N and Neem Coated Urea 40%N on sorghum. Four rates of i.e. l90,238 and 286
Kg N /ha(80, 100 and 120 kg N/fed) were arranged in the sub main plots. The second field experiment was carried
out during the following winter, season of2016- 2017 growing wheat (Tricticum aestivum), on the same plots of
the first experiment, to study the residual effect. ,Results obtained the increases the rate of caused a significant
increase in grains and straw yields of sorghum, as well as grain yield of the following wheat. The highest mean
values of soil total-N as well as and available-N occurred after wheat harvest in soil given the 238 kg/ha in rate
as urea formaldehyde or Neem coated urea.

Summary in Arabic