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Severe P deficiency symptoms on tomato |
Underside of leaf of tomato with severe P deficiency |
Description | Syllabus
| Notes |Guide | Internet
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Results of Phosphorus Experiment withTomatoes.
RESULTS FOR 2004 NIGHT CLASS
FALL 2002 NIGHT CLASS
Spring 2002 Day Class
RESULTS FOR 2001 AND 2000 TOMATOES
RESULTS FOR 2000 Corn
|
RESULTS |
NIGHT CLASS |
2004 |
|
|
Material added |
Height, inches |
Weight, grams |
Symptoms index |
|
Acid soil |
|||
|
None |
30 |
101 |
2 |
|
Rock phosphate |
26 |
97 |
1 |
|
Bone meal |
32 |
169 |
0 |
|
Superphosphate |
32 |
173 |
0 |
|
Limed soil |
|||
|
None |
29 |
105 |
2 |
|
Rock phosphate |
24 |
113 |
2 |
|
Bone meal |
27 |
208 |
0 |
|
Superphosphate |
32 |
185 |
0 |
|
Acid-organic matter |
|||
|
None |
28 |
93 |
1 |
|
Rock phosphate |
25 |
126 |
0 |
|
Bone meal |
28 |
172 |
0 |
|
Superphosphate |
28 |
175 |
0 |
|
Limed-organic matter |
|||
|
None |
32 |
106 |
1 |
|
Rock phosphate |
28 |
146 |
0 |
|
Bone meal |
34 |
176 |
0 |
|
Superphosphate |
32 |
182 |
0 |
*Index of deficiency symptoms: 3, severe; 2, moderate; 1, slight; 0, no symptoms
RESULTS FOR FALL 2002 NIGHT CLASS
|
Material added |
--------Height, cm --------- |
-------Shoot weight, g------ |
---Deficiency symptoms*-- |
|
No phosphate |
32_____________________ |
26____________________ |
3______________________ |
|
Rock phosphate |
31_____________________ |
22 ___________________ |
0______________________ |
|
Bone meal |
38_____________________ |
64 ____________________ |
0______________________ |
|
Superphosphate |
40_____________________ |
44 ____________________ |
0______________________ |
|
No phosphate |
29_____________________ |
18____________________ |
2______________________ |
|
Rock phosphate |
40_____________________ |
34 ____________________ |
2______________________ |
|
Bone meal |
45_____________________ |
59 ____________________ |
0______________________ |
|
Superphosphate |
42_____________________ |
70 ____________________ |
0______________________ |
Acid soil plus organic matter
|
No phosphate |
27_____________________ |
24 ____________________ |
2______________________ |
|
Rock phosphate |
36_____________________ |
36 ____________________ |
1______________________ |
|
Bone meal |
42_____________________ |
55 ____________________ |
0______________________ |
|
Superphosphate |
40_____________________ |
44 ____________________ |
0______________________ |
Limed soil plus organic matter
|
No phosphate |
28____________________ |
24 ____________________ |
1______________________ |
|
Rock phosphate |
38_____________________ |
40 ____________________ |
1______________________ |
|
Bone meal |
40_____________________ |
67 ____________________ |
0______________________ |
|
Superphosphate |
38____________________ |
44 ____________________ |
0______________________ |
*Used the following numerical ratings for deficiency symptoms; 0, no symptoms; 1, slight; 2, moderate; 3, severe symptoms.
RESULTS FOR SPRING 2002 TOMATOES
|
Material added |
--------Height, cm --------- |
-------Shoot weight, g------ |
---Deficiency symptoms*-- |
|
No phosphate |
48_____________________ |
99____________________ |
3______________________ |
|
Rock phosphate |
57_____________________ |
139___________________ |
2______________________ |
|
Bone meal |
64_____________________ |
192____________________ |
0______________________ |
|
Superphosphate |
55_____________________ |
213____________________ |
1______________________ |
|
No phosphate |
48_____________________ |
90____________________ |
2______________________ |
|
Rock phosphate |
54_____________________ |
130____________________ |
2______________________ |
|
Bone meal |
60_____________________ |
212____________________ |
1______________________ |
|
Superphosphate |
65_____________________ |
220____________________ |
0______________________ |
Acid soil plus organic matter
|
No phosphate |
48_____________________ |
112____________________ |
2______________________ |
|
Rock phosphate |
58_____________________ |
132____________________ |
2______________________ |
|
Bone meal |
61_____________________ |
243____________________ |
1______________________ |
|
Superphosphate |
47_____________________ |
195____________________ |
1______________________ |
Limed soil plus organic matter
|
No phosphate |
47____________________ |
120____________________ |
2______________________ |
|
Rock phosphate |
62_____________________ |
195____________________ |
1______________________ |
|
Bone meal |
62_____________________ |
231____________________ |
0______________________ |
|
Superphosphate |
63____________________ |
195____________________ |
0______________________ |
*Used the following numerical ratings for deficiency symptoms; 0, no symptoms; 1, slight; 2, moderate; 3, severe symptoms.
RESULTS FOR 2000
|
Material added |
--------Height, cm --------- |
-------Shoot weight, g------ |
---Deficiency symptoms*-- |
|
No phosphate |
38_____________________ |
15____________________ |
3______________________ |
|
Rock phosphate |
40_____________________ |
50___________________ |
1______________________ |
|
Bone meal |
50_____________________ |
111____________________ |
1______________________ |
|
Superphosphate |
53_____________________ |
127____________________ |
1______________________ |
|
No phosphate |
38_____________________ |
52____________________ |
2______________________ |
|
Rock phosphate |
45_____________________ |
65____________________ |
2______________________ |
|
Bone meal |
45_____________________ |
116____________________ |
1______________________ |
|
Superphosphate |
53_____________________ |
140____________________ |
0______________________ |
Acid soil plus organic matter
|
No phosphate |
45_____________________ |
53____________________ |
2______________________ |
|
Rock phosphate |
50_____________________ |
103____________________ |
1______________________ |
|
Bone meal |
43_____________________ |
143____________________ |
0______________________ |
|
Superphosphate |
53_____________________ |
125____________________ |
0______________________ |
Limed soil plus organic matter
|
No phosphate |
38____________________ |
55____________________ |
1______________________ |
|
Rock phosphate |
40_____________________ |
104____________________ |
1______________________ |
|
Bone meal |
45_____________________ |
140____________________ |
0______________________ |
|
Superphosphate |
50____________________ |
131____________________ |
0______________________ |
*Used the following numerical ratings for deficiency symptoms; 0, no symptoms; 1, slight; 2, moderate; 3, severe symptoms.
Severe P deficiency symptoms on tomato Underside of leaf of tomato with severe P
deficiency
SPRING 2000 Corn Harvest from Night Class
|
Material added |
--------Height, cm --------- |
-------Shoot weight, g------ |
---Deficiency symptoms*-- |
|
No phosphate |
36_____________________ |
45_____________________ |
2______________________ |
|
Rock phosphate |
36_____________________ |
44_____________________ |
3______________________ |
|
Bone meal |
48_____________________ |
70_____________________ |
0______________________ |
|
Superphosphate |
65_____________________ |
150____________________ |
0______________________ |
|
No phosphate |
30_____________________ |
42_____________________ |
3______________________ |
|
Rock phosphate |
48_____________________ |
49_____________________ |
2______________________ |
|
Bone meal |
60_____________________ |
55_____________________ |
2______________________ |
|
Superphosphate |
54_____________________ |
125____________________ |
0______________________ |
Acid soil plus organic matter
|
No phosphate |
50_____________________ |
94_____________________ |
1______________________ |
|
Rock phosphate |
58_____________________ |
105____________________ |
0______________________ |
|
Bone meal |
75_____________________ |
140____________________ |
0______________________ |
|
Superphosphate |
53_____________________ |
155____________________ |
0______________________ |
Limed soil plus organic matter
|
No phosphate |
45_____________________ |
55_____________________ |
2______________________ |
|
Rock phosphate |
56_____________________ |
91_____________________ |
1______________________ |
|
Bone meal |
56_____________________ |
100____________________ |
1______________________ |
|
Superphosphate |
64_____________________ |
140____________________ |
0______________________ |
*Used the following numerical ratings for deficiency symptoms; 0, no symptoms; 1, slight; 2, moderate; 3, severe symptoms.