What are some fruits and vegetables with very low yield percent?

It's difficult to provide a definitive list of fruits and vegetables with "very low" yield percentages without more context. This is because yield is a complex concept influenced by factors like:

* Variety: Different cultivars within the same species can have drastically different yields.

* Growing conditions: Climate, soil, and cultivation practices all play a significant role.

* Definition of yield: Is it the total weight of edible fruit/vegetable, or does it include inedible parts (like stems, leaves, etc.)?

However, based on general knowledge of plant characteristics, some fruits and vegetables are known to be relatively low-yielding compared to others. These may include:

Fruits:

* Berries: Many berries, such as raspberries, blackberries, and blueberries, have low yields per plant due to their small size and delicate nature.

* Melons: While watermelons and cantaloupes can produce large fruit, they take up a lot of space and often have a low yield in terms of edible flesh per square foot.

* Avocados: Avocado trees are known for their slow growth and relatively low fruit production.

* Grapes: While grape vines produce a large amount of fruit, the actual edible portion (the grapes themselves) is relatively small compared to the vine's size.

* Citrus: Citrus fruits, especially oranges, can be quite low-yielding, especially if they are not well-maintained or grown in ideal conditions.

Vegetables:

* Root vegetables: Beets, carrots, and parsnips have a relatively low yield of edible root per plant due to the large amount of inedible foliage.

* Squash: Many types of squash, such as butternut squash, have a low yield per plant due to their large size and long growing season.

* Tomatoes: While tomato plants can produce a large amount of fruit, they require significant care and maintenance to achieve high yields.

* Bell peppers: Similar to tomatoes, bell pepper plants can be quite low-yielding if they are not well-maintained or grown in ideal conditions.

Important Note: These are general observations, and there are always exceptions. For instance, some heirloom tomato varieties are known for their exceptionally high yields.

If you want more specific information, you could try searching for "yield comparison" or "fruit/vegetable production" online. You can also find valuable information in gardening books and websites.