Phosphorus Placement Effects on Phosphorous Recovery Efficiency and Grain Yield of Wheat under No-Tillage in the Humid Pampas of Argentina
Table 3
Aerial dry matter accumulation affected by P rate and placement method at Tandil, Necochea, and Balcarce experimental sites.
Tillering
First node
Flowering
PM
Tandil
P response
kg ha−1
0
218 a
1262 b
6175 a
10958 a
25
303 a
1961 a
6668 a
13438 a
50
320 a
2137 a
7669 a
13346 a
150
349 a
2432 a
7802 a
14111 a
Broadcast ()
282 b
1808 a
7136 a
13739 a
Deep-banded ()
341 a
2200 a
7201 a
13046 a
×
ns
ns
ns
ns
Necochea
P response
kg ha−1
0
288 d
2939 c
8795 b
15306 a
25
495 c
4519 b
10377 a
16229 ab
50
587 b
4706 b
11254 a
16917 ab
150
693 a
5028 a
10602 a
17247 b
Broadcast ()
458 b
4402 b
10501 a
16549 a
Banded ()
624 a
4824 a
11129 a
16597 a
×
ns
ns
ns
ns
Balcarce
P response
kg ha−1
0-P
478 b
1557 b
6838 a
9188 b
25-P-broadcast
761 a
1987 a
7724 a
11103 a
25-P-banded
932 a
2171 a
7267 a
12146 a
Means in the same column followed by the same letter are not significantly different from each other based on the Duncan test (0.05). Phosphorus response is compared using 0, 25, 50, and 150 P rates. Phosphorus placement method is only compared at 25 and 50 P rates. PM: physiological maturity; ns: not significant.
