Lin Zeng was promoted to a four-star breeding apprentice and won the seeds of the plant varnish tree by lottery.

Varnish trees, perennial shrubs, grow for one year and bear fruit in the second year, and have a direct use of fuel energy in the fruit, which can be used as a high-quality substitute for the original fuel in nature. It is able to absorb sunlight energy from nature and convert it into liquid fuel form with high efficiency.

In more popular terms, varnish can be directly called "petroleum fruit".

How the raw materials of the varnish tree were discovered and how they were successfully refined could no longer be verified in the Xenodimensional world. Lin Zeng saw from the information that the varnish seeds he obtained were the most widely planted varieties, which could adapt to the climate of most regions, and the yield was not low.

In fact, the seeds of the clear oil tree have been improved by generations of breeders and even breeders, and finally finalized, and they are very popular with farmers in the different worlds.

It was not the seed of a native plant, so Lin Zeng could only propagate its variety, but could not refine it.

In the information on varnish trees, there are very detailed instructions on how to plant them.

Each varnish tree needs to be planted at a distance of more than two meters. After entering the mature stage, the plants bear fruit in four seasons, and the yield varies under different temperature and light conditions.

Varnish plants prefer areas with high sunlight and dry climates. The more hours of sunlight a year, the better the growth and fruiting of the varnish tree.

Lin Zeng compared the data and found that the northwest plateau of China is the most suitable place to plant varnish trees. Varnish trees are planted in this area, and the yield is estimated to be twice as high as that on the Qinghe River.

The shell of the varnish fruit is hard and cannot be broken by manpower. In a hard shell, the silver liquid vegetable fuel, which has an extremely high burning rate, is preserved.

The light oil tree is a plant that is not very suitable for home cultivation, and it has a special group planting property. Single-planted varnish trees have very low yields and are not easy to bear fruit with. However, in an area, after planting a large number of varnish trees, its growth will get better and better, and the yield will gradually increase.

Ordinary varnish fruits, after ripening, weigh 2-3 catties. Based on the average density of varnish fruits, 3-5 litres of vegetable fuel can be harvested per varnish fruit.

Depending on the conditions of the growing area, the number of varnish fruits that a varnish tree can produce varies from 200 to 400 per year. Based on the minimum yield, each varnish tree can produce at least 600 litres of vegetable fuel per year.

At present, the price of oil in the Chinese market is usually more than 6 yuan per liter, and if the grower sells it at a price of 5 yuan per liter, then a varnish tree can bring at least 3,000 yuan to the grower.

On average, about 100 varnish trees can be planted per acre of land, so calculated, most of the current farm products can not achieve such a high income.

Even as the price of plant-based fuel drops as the popularity of plant-based fuels falls, the growers of varnish trees are still very profitable.

The most important thing is that the varnish tree is not an annual plant, but a perennial shrub, and its production cycle is more than 20 years.

Lin Zeng could already imagine what the next action would be if those secret realm entrants were exchanged for the Varnish Tree. In particular, as long as Lei Hai Yekong, a person in charge with a national background, provides sufficient varnish seeds, it is estimated that in less than three to five years, Huaguo will leap to the ranks of the world's major oil-producing countries.

The varnish tree is a typical cash crop in the Xenotropic world.

Agricultural growers in Xenoworlds rarely grow ordinary farm products, except for some special varieties. Because in the era when everyone can grow, the poor sales of ordinary farm products will definitely make farmers bankrupt.

Most of the plants they grow are some daily cash crops. Just like the varnish tree, its plant fuel can not only be sold directly, but also purified and smelted to become a higher quality and grade plant energy block. The benefits obtained in this are not replaceable by ordinary agricultural products.

Lin Zeng roughly glanced at the specific information of the Varnish Tree, and his first thought was not that the oil would be replaced by plant fuel, but that he was very happy, the Varnish Tree would inevitably cause a large number of exchanges among the entrants of various secret realms, and his crystal source body was estimated to be no longer worried.

Lin Zengke has no interest in becoming an energy tycoon.

He wants to become a local tyrant who squandered the crystal source body like earth.

The benefits brought by plant energy are not as lovely as those of crystal source bodies.

Enter the seed world and take out the varnish tree seeds obtained by the lottery.

The seeds of the varnished tree look like a smaller walnut, with more furrows on the surface than walnuts, and the seeds are hard like a stone.

The system reward is stingy, there is only such a seed, Lin Zeng wants more, he needs to plant this varnish tree, obtain its plant raw materials, and gradually increase the number of varnish trees after refining in the Ding furnace.

Lin Zeng thought about it, and to be on the safe side, he found an empty planting furnace and planted the seeds of the varnish tree in the planting furnace.

In the Apprentice Trials Realm, when he was lucky, he would occasionally get one or two Planter Furnaces. However, Lin Zeng did not lack planting land, and did not pay much attention to the planting space ranging from dozens to more than 100 square meters in the plantation furnaces, so he did not make much use of these planting furnaces.

The varnish tree seeds are very precious to Lin Zeng, and even if he draws the next lottery, the probability that he can win the varnish tree seeds is very small. Therefore, he didn't want to plant the varnish tree outdoors, and if something happened to him, he couldn't get it back from crying.

It is safer to plant a furnace, and when the varnish tree develops to a certain scale, it is not too late to take it out.

Just like Lin Zeng's milk fruit mother plant, it has always been planted in the planting furnace and carried by Lin Zeng.

The original small planter was not enough, so it was transplanted to a larger planter. Anyway, no one knows that he has a milk fruit mother plant in his hand. Everyone thought that the milk fruit was just a plant that had been exchanged for a secret realm.

Although the planting furnace in Lin Zeng's hand did not grow plants, he had already prepared sufficient soil.

However, the varnish tree is actually a plant that is not suitable for indoor cultivation, and it does not grow as well in the plantation furnace as it does when it is bathed in the sun.

However, Lin Zeng does not need to produce too much varnishe, as long as there are enough leaves and branches, it is enough.

The purpose of his cultivation is to obtain raw materials, not for plant energy.

A safe place to grow is more important than yield.

After planting the varnish seeds, Lin Zeng took some fertilizer and watered the seeds with some fertilizer and micronuno solutions.

With the growth-promoting effect of fertilized watermicrons, even if the varnish tree no longer likes the growth environment of the planter, it will honestly take root and grow leaves.