Field Research & Agronomy

Perenjori

Aim

A long-term trial to assess how wheat responds to N and P fertilizer applications after gypsum and lime application with and without incorporation

Key Messages

60 kg/ha of N and 12 kg/ha P optimised yield under these conditions
Nitrogen response was significantly limited without the application of P

Table 1. Soil Test Results

Depth	NO_3^-	NH_4⁺	OC	P	PBI	K	S	Cu	Zn	pH_[Ca]	Al
0-10cm	13	1	0.6	17	23	44	7	0.26	0.38	6.1	0.2
10-20cm	7	2		8		39	17			5.1	0.3
20-30cm	3	1		5		44	29			4.8	1.0

Growing season rainfall at Perenjori was average, receiving just over the average in total and wetter than average June and July.

Methods

A factorial trial design that included three rates of nitrogen, 0, 25, 50 kg N/ha, and four rates of phosphorus, 0, 4, 8 and 12 kg P/ha with lime surface applied or incorporated and compared to gypsum.

Results:

***Figure 1.*** *Yield response to N and P rates with and without lime and gypsum.*

Conclusions:

Significant yield response to N & P rates (P
Significant yield differences between lime treatments
The highest yields were generated from 60 kg/ha N and 12 kg/ha P

Wheat