High CP low RFV 28 day alfalfa

Hi all,

 

Just wondering if anyone has an explanation for why we would be getting tests as follows on pure crop alfalfa:

 

27 days since last cut: 22.5% CP, 132 RFV
29 days: 22% CP, 154 RFV
29 days: 19% CP, 125 RFV

 

Weather: way above average rainfall in April/May (~300mm, avg. 100mm) 

High humidity, hot days from tops of 29C (84F) to 34C (93F), lows of 16C (60F) to 22C (71F) 

 

Soil tests are sound, enough P and K in all fields. 

These tests are highly unusual - last year the crop tested within standard quality grades (22% CP = 185 RFV, 20% CP = 170 RFV etc.)

Any help much appreciated

High CP low RFV 28 day alfalfa