Department of Soil Science, H.P. Agricultural University, Palampur, Himachal Pradesh, 176062.
* Present address: Department of Soil Science, Dr YS Pannar University of Horticulture and Forestry, Nauni, Solan, H.P., 173230.
Field experiments were conducted on a silty clay loam soil (Typic Hapludalf) during 1989–90 and 1990–91 to study the effect of nitrogen and tillage on water stress indices, viz. relative leaf water content (RLWC), xylem water potential (XWP), leaf diffusion resistance (LDR) and stress-degree-days (SDD) and crop yield of wheat (Triticum aestivum L.). RLWC and XWP at different stages increased with N application andwere higherat higher level of N and under deep ploughing, but the reverse was observed for LDR and SDD.SDD were not affected by tillage practices. Changes in XWP were more during morning hours as compared with evening hours. Crop yield was higherat 120 kgN ha−1 and under deep ploughing.
Nitrogen; tillage, water stress indices, wheat
