Если сажать клубнику аккуратно и регулярно поливать её, урожай будет лучше.

Here Russian is using the infinitive to make the condition general and impersonal: if one plants / if you plant / if people plant. There is no specific subject named.

This is common when Russian talks about a general rule, recommendation, or typical result. So the sentence is not about one specific person; it means something like whenever strawberries are planted carefully and watered regularly, the harvest is better.

The imperfective aspect fits the idea of a general process or repeated action.

• сажать = to plant, as an activity/process
• поливать = to water, usually repeatedly or regularly

That works well with регулярно and with the general-rule meaning of the sentence.

If you used perfective forms, the meaning would shift toward a completed one-time action:

• Если посадить клубнику... = if you plant the strawberries
• Если полить... = if you water them once

So the original sentence sounds more like advice about proper cultivation in general.

Because клубнику is the accusative case, which is needed for the direct object of сажать.

The dictionary form is клубника.
In the accusative singular it becomes клубнику.

So:

• клубника = strawberry / strawberries, as the subject or dictionary form
• сажать клубнику = to plant strawberries

In Russian, клубника is often used as a collective or mass noun for the crop in general. So singular Russian can correspond to plural English.

That means сажать клубнику very naturally means to plant strawberries. Russian is thinking of the crop as a whole, not necessarily counting individual berries or plants.

Её refers back to клубнику.

Since клубника is feminine singular, the pronoun is also feminine singular:

• клубника → её

It is also in the accusative case, because поливать takes a direct object:

• поливать её = to water it / them

For English speakers, it may feel odd to use her, but in Russian this is just grammatical gender, not biological sex.

Sometimes yes, but here keeping её is the most natural choice.

Russian often omits things that are obvious from context, so Если сажать клубнику аккуратно и регулярно поливать, урожай будет лучше could be understood. But it sounds a bit more compressed and less smooth.

Using её makes the sentence clearer and more natural:

• first mention the noun: клубнику
• then refer back to it with её

Yes, Russian word order is fairly flexible, and Если аккуратно сажать клубнику и регулярно поливать её, урожай будет лучше is also very natural.

Both orders are understandable:

• сажать клубнику аккуратно
• аккуратно сажать клубнику

Putting аккуратно earlier often sounds a bit more neutral. The original order is possible, but it gives slightly more focus to how the strawberries are planted.

Because Если сажать клубнику аккуратно и регулярно поливать её is a subordinate clause introduced by если.

In Russian, subordinate clauses are normally separated by a comma from the main clause:

• subordinate clause: Если ...
• main clause: урожай будет лучше

So the comma marks the boundary between the condition and the result.

Because лучше is the comparative form meaning better.

• будет лучше = will be better
• будет лучшим = will be the best

In this sentence, the idea is comparison: the harvest will improve. So Russian uses лучше, not лучшим.

Because this sentence expresses a real or expected condition, not a contrary-to-fact hypothetical.

• Если ..., урожай будет лучше = If ..., the harvest will be better.
• Если бы ..., урожай был бы лучше = If ..., the harvest would be better.

The version with бы is more hypothetical or unreal. The original sentence sounds like practical advice about what normally leads to a better harvest.

Yes. If you want to name the subject directly, you can use a normal finite verb form.

For example:

• Если вы аккуратно сажаете клубнику и регулярно поливаете её, урожай будет лучше.
• Если вы будете аккуратно сажать клубнику и регулярно поливать её, урожай будет лучше.

These versions are more explicit about who is doing the action. The original infinitive version is more general and instructional.