если бы" или "если бы"):

1. Milk yields will be higher if proper amounts of high-quality feeds are fed to cows.

2. Milk yields would be higher if proper amounts of high-quality feeds were fed to cows.

3. Less time and labour will be needed if feeds are inixed automatically.

4. Less time and labour would be needed if feeds were mixed automatically.

5. If there were robots for controlling weeds, this labour-consuming operation would be performed by them.​

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1. Milk yields will be higher if proper amounts of high-quality feeds are fed to cows.
2. Milk yields would be higher if proper amounts of high-quality feeds were fed to cows.
3. Less time and labour will be needed if feeds are mixed automatically.
4. Less time and labour would be needed if feeds were mixed automatically.
5. If there were robots for controlling weeds, this labour-consuming operation would be performed by the

1. If proper amounts of high-quality feeds are fed to cows, milk yields will be higher.

Explanation: In this sentence, the use of "will" suggests a factual statement, meaning that if cows are given the right amount of high-quality feed, it is certain that the milk yields will increase. The cause and effect relationship is straightforward - providing cows with proper amounts of quality feed results in higher milk yields.

2. If proper amounts of high-quality feeds were fed to cows, milk yields would be higher.

Explanation: In this sentence, the use of "would" indicates a hypothetical or imaginary situation. It suggests that if cows were given the right amount of high-quality feed (which is not necessarily the current reality), there is a possibility that the milk yields might increase. The use of "were" instead of "are" also indicates a conditional statement in the past tense.

3. If feeds are mixed automatically, less time and labour will be needed.

Explanation: This sentence implies a cause and effect relationship. If feeds are mixed automatically, it is a fact that less time and labor will be required. The use of "will" indicates a certain outcome in the future.

4. If feeds were mixed automatically, less time and labour would be needed.

Explanation: This sentence contains a hypothetical or unreal condition. It suggests that if feeds were mixed automatically (which may not be the case), it would result in less time and labor being required. The use of "were" instead of "are" indicates a conditional statement in the past tense.

5. If there were robots for controlling weeds, this labor-consuming operation would be performed by them.

Explanation: This sentence presents a hypothetical situation that does not currently exist. It suggests that if robots were available for controlling weeds (which is not the reality), they would perform the labor-intensive task instead of humans. The use of "were" instead of "are" indicates a conditional statement in the past or present unreal condition.