7232756
Descrição
FlashCards por Leah Jones, atualizado more than 1 year ago
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Criado por Leah Jones
quase 8 anos atrás
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| Questão | Responda |
| Buffer pH | Resistance to change in soil pH |
| What is salinity? | When there is an accumulation of salts in the soil. |
| Why is salinity a problem? | The salts absorb water, keeping it from being plant available. The plant then dies from dehydration. |
| What is sodicity? | An excess of sodium cations in the soil. |
| Why is sodicity a problem? | Na+ is a small ion with a large water hull. When Na+ occupies the CEC sites, it doesn't have enough charge to keep the colloids together, so they repel and cause deflocculation. |
| How do we remedy salinity? | By leaching the soils |
| How do we remedy sodicity? | By adding gypsum |
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