# Soil and Drought Field Guides for Growers

> Field guides on sandy soils, vines in dry climates, drought yield loss and soil amendments compared — diagnosis first, then the options and their trade-offs.

Canonical: https://www.kuzog.com/guides/
Language: en

Four guides on soil water, drought and amendments. Each one starts with the diagnosis, sets out the neutral options with their trade-offs, and then says where Hydrobio by KUZOG fits — and where it does not.

## Answers to the questions growers actually ask.

- [Sandy soil that will not hold water: how to raise its water reserve](https://www.kuzog.com/guides/sandy-soil-water-retention/) — A sandy soil does not hold water because its pores are too wide. Gravity carries much of each rainfall or irrigation event below the root zone before roots reach it: the parcel is short of storage, not of water. Raise the reserve by adding surfaces and fine pores where roots work; a soil analysis decides which way.
- [Vines struggling in a dry Mediterranean climate: what soil amendments actually do](https://www.kuzog.com/guides/vines-dry-mediterranean-climate/) — An amendment changes what your soil stores and how far the roots reach it. It does not make rain, and it will not rescue a block whose real constraint is rootstock, canopy or a capped water allocation. Decide which of those binds before you spend on the soil.
- [Lost 30% of your harvest in two dry years? What to do to the soil, not the irrigation](https://www.kuzog.com/guides/drought-yield-loss-soil/) — The 30% is your figure, not ours, and no one can promise to give a defined share of it back. After two dry years the deficit usually sits in what the soil stores and what the roots reach, not in the pipework: irrigation moves water, it does not make a soil keep it. In most regions the allocation, not the pump, is the binding limit.
- [Mineral and mycorrhizal soil amendments in France: the options, compared](https://www.kuzog.com/guides/mineral-mycorrhizal-soil-amendments-france/) — The market splits into four families: mineral amendments, biological inoculants, organic amendments, and hybrids of the first two. Each acts by a different mechanism and on a different timescale. Which one suits a parcel is decided by the soil analysis, not by the category on the bag.

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