Table 1 Description of the treatments.

From: Evaluation of phosphorus fertilizer sources and nitrogen optimization for wheat and tef in Ethiopia’s central highlands

#

Treatment name

Treatment application

T1

Negative control

Without fertilizer

T2

NPS + 100% RN

100% recommended rate of P2O5 from NPS at sowing.

100% recommended rate of N (1/2 at sowing + 1/2 at tillering).

T3

DAP + 100% RN

100% recommended rate of P2O5 from DAP at sowing.

100% recommended rate of N (1/2 at sowing + 1/2 at tillering).

T4

TSP + 100% RN

100% recommended rate of P2O5 from TSP at sowing

100% recommended rate of N (1/2 at sowing + 1/2 at tillering).

T5

TSP + 100% RN

100% recommended rate of P2O5 from TSP at sowing.

100% recommended rate of N (0 at sowing + 2/3 at tillering + 1/3 at jointing).

T6

TSP + 75% RN

100% recommended rate of P2O5 from TSP at sowing.

- 75% recommended rate of N (0 at sowing + 1/2 at tillering + 1/2 at jointing).

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