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| humus | |||
| top soil | |||
| topsoil | |||
| litter | |||
| humus The more or less decomposed organic matter in the soil. Besides being the source of most of the mineral salts needed by plants, humus improves the texture of the soil and holds water, so reducing the loss of nutrients by leaching | |||
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| humus | |||
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humus : 76 צירופים, 7 נושאים |
| חַקלָאוּת | 6 |
| יַעֲרָנוּת | 2 |
| כללי | 1 |
| מדעי החיים | 30 |
| מדעי הטבע | 24 |
| מדעי הקרקע | 7 |
| סביבה | 6 |