Table of Contents
Nitrogen
Asparagus Nitrogen Guidelines |
|
Timing |
Actual N
|
|
Nursery |
751 |
|
New plantings |
1102 |
|
Established plantings |
|
|
Pre-harvest |
55 |
|
Post-harvest |
55 |
|
Total |
110 |
|
1 An additional 50 kg nitrogen/ha may be applied as a side-dress application in August or early September if rainfall was excessive in the summer. 2 Broadcast all the recommended nitrogen and potash prior to planting. |
|
Phosphorous
Phosphorus Requirements for Asparagus on Mineral Soils |
||
|
Legend: HR = High Response MR = Medium Response LR = Low Response RR = Rare Response NR = No Response |
||
Sodium Bicarbonate Phosphorus Soil Test (ppm) |
Rating |
Phosphate (P205) Required kg/ha |
|
0-3 |
HR |
110 |
|
4-5 |
HR |
100 |
|
6-7 |
HR |
90 |
|
8-9 |
HR |
70 |
|
10-12 |
HR |
50 |
|
13-15 |
MR |
20 |
|
16-20 |
MR |
20 |
|
21-25 |
LR |
20 |
|
26-30 |
LR |
20 |
|
31-40 |
RR |
0 |
|
41-50 |
RR |
0 |
|
51-60 |
RR |
0 |
|
61-80 |
NR |
0 |
|
80+ |
NR |
0 |
Potassium
Potassium Requirements for Asparagus on Mineral Soils |
||
|
Legend: HR = High Response MR = Medium Response LR = Low Response RR = Rare Response NR = No Response |
||
Ammonium Acetate Potassium Soil Test (ppm) |
Rating |
Potash (K2O) Required (kg/ha) |
|
0-15 |
HR |
420 |
|
16-30 |
HR |
400 |
|
31-45 |
HR |
360 |
|
46-60 |
HR |
360 |
|
61-80 |
HR |
280 |
|
81-100 |
HR |
250 |
|
101-120 |
HR |
220 |
|
121-150 |
MR |
190 |
|
151-180 |
MR |
160 |
|
181-210 |
MR |
130 |
|
211-250 |
MR |
80 |
|
>250 |
LR |
0 |