Abstract
The influence was studied of K, P and N in the potato variety President in an outdoor experiment in stoneware cylinders filled with alluvial riverine sand and in a greenhouse in glazed stoneware pots filled with glass sand, partly treated with concentrated HCl. From the outdoor plants, sections were cut through the middle of the first and ninth internode. With an Abb_'s prism, drawings were made, indicating diagrammatically the various tissues. The surface areas of the various tissues were measured with a planimeter. The average percentage of each tissue was calculated for each treatment (KPN, NP, KN, KP, P, K, N, 0).
The external and internal symptoms of Ca, Mg, Mn, Fe, B and Zn deficiency and those of Mn, B and Cu excess were studied in some potato varieties grown in glass sand or water culture. The effect of Na and Cl was studied in water culture by adding increasing amounts of NaCl, or CaCl 2 to the medium. Tubers showed internally typical symptoms only in Ca and B deficiency. The tuber disease from calcium deficiency was called medullary necrosis.
The external and internal symptoms of Ca, Mg, Mn, Fe, B and Zn deficiency and those of Mn, B and Cu excess were studied in some potato varieties grown in glass sand or water culture. The effect of Na and Cl was studied in water culture by adding increasing amounts of NaCl, or CaCl 2 to the medium. Tubers showed internally typical symptoms only in Ca and B deficiency. The tuber disease from calcium deficiency was called medullary necrosis.
| Original language | Dutch |
|---|---|
| Qualification | Doctor of Philosophy |
| Awarding Institution | |
| Supervisors/Advisors |
|
| Award date | 27 Mar 1939 |
| Place of Publication | Wageningen |
| Publisher | |
| DOIs | |
| Publication status | Published - 27 Mar 1939 |
Keywords
- crop damage
- soil properties
- solanum tuberosum
- potatoes