The Irrigation of Oud Trees

Water is the lifeblood of every tree, and oud trees are no exception. But the talk of their irrigation is not a talk of "increasing" the water so much as it is a talk of balance: a sufficient humidity that supports the growth, with a good drainage that protects the roots from drowning. In this article we present a general educational overview of the irrigation of oud trees and their water need in their different stages of growth, in descriptive, reserved language, without claiming an engineering expertise in the management of farms.

1. Why does irrigation matter?

Water is a fundamental factor in the life of any tree; by it the nutrients are transported, the tissues are built, and the growth is managed. And oud trees, being tropical trees that arose in humid environments, are described generally as loving a sufficient humidity, especially in their early stages. This is why irrigation comes among the axes of the cultivation of oud trees as a daily care no less important than the choice of the soil or the seeds.

But the essential idea we would establish from the outset is that irrigation is not "the more you increase, the better." The excess, stagnant water may be harmful to the degree that thirst is harmful, and perhaps more. The matter, then, is a matter of a fine balance: providing a humidity that suffices the tree without drowning its roots in a retained water. And this balance is the thread that runs through this whole article from its beginning to its end.

And it is important to distinguish between what we address here and what we addressed in another place of the guide. The talk of rainfall and humidity concerns the natural climatic context: how much the sky rains, and what the humidity of the air is in the habitat of the tree. As for here, we speak of irrigation as an applied practice that the farmer carries out with his hand when nature alone does not suffice — and they are two integrated, not identical, doors, one about the greater environment and the other about the human intervention within it.

2. The need of the small seedlings

It is mentioned generally that the small seedlings of oud trees are more sensitive to the lack of water than the established trees. Their roots are still short, limited in spread, not yet deepened in the soil in search of humidity, and therefore they depend on what reaches them in the near surface layer. From here it is circulated that this early stage needs a more regular and consistent humidity, such that the seedling is not exposed to a sharp, sudden aridity that strains it while it is tender.

And this is qualitative talk, not quantitative; we do not mention the number of times of irrigation in the week nor the amount of water per seedling, because that depends on the heat of the atmosphere, the type of the soil, the size of the seedling, and the system of cultivation, and it is not valid to reduce it to a single number that suits every case. The general principle only is what is intended: the small seedling wants a continuous, moderate humidity, neither a flood nor a thirst, until its roots establish gradually.

And the care of irrigation in this stage connects to two previous stages in the guide: the production of oud seedlings in the nursery where the seedling is raised in a protected, humidity-controlled environment, then the transplanting of oud seedlings to the permanent ground where they face harsher conditions. And in the wake of transplanting specifically, the care for humidity is emphasized, since the seedling has been exposed to a stress in its roots and needs stability before it relies on itself. And the details of this care are the affair of the agricultural specialist following the state of the seedlings in their location.

3. The need of the mature trees

With the advance of the tree in age and the establishment of its roots, it is expected generally that it becomes more able to tolerate the variation of humidity than the small seedling. The root that deepened and spread can reach a farther humidity in the soil, and withstand periods of the lack of water that the seedling does not withstand. This is why the established trees are described as sturdier and more patient relatively, even though they remain in their essence tropical trees that prefer an environment in which thirst does not prolong.

But this relative sturdiness does not mean dispensing with water. The mature tree still needs a sufficient humidity to continue its growth and the formation of its tissues, and it may be affected by long periods of severe aridity like the rest of the plants. The difference is that it possesses of roots and size what grants it a wider margin for tolerance, so its need for the intervention of irrigation is less pressing and less frequent than what the seedling needs in its beginnings.

And we repeat the reminder that this is a general description of a tendency that is observed, not a numerical rule that we set. The measure of what the mature tree tolerates of aridity, and when it needs a helping irrigation, depends on the species, the soil, the climate, the age of the tree, and the state of the season, and its field estimation remains the work of the farmer following up and the agricultural specialist, not the work of the one who describes the scene from afar.

4. Drainage and the danger of waterlogging

If this article has a single message that deserves to be preserved, it is that good drainage is no less important than the water itself. Oud trees, despite their love of humidity, are mentioned generally as not loving the stagnant, retained water around their roots. And the soil saturated with water for long periods deprives the roots of the air they need, and may open the door before problems in the roots of rot and diseases. This is why it is circulated that the waterlogging may be more dangerous to the tree than its moderate lack.

And here the meaning of the "balance" that we repeated becomes clear: what is required is an abundant humidity and a good drainage at one and the same time, not one without the other. A land that retains enough of the humidity but allows the excess to drain away from the zone of the roots. From here the choice of the land and its preparation was among the most important of what is looked into before the cultivation, and we have devoted to that an independent talk about the suitable soil for oud trees, where the texture of the soil and its structure connect directly to its capacity for drainage.

And we do not set here technical limits for the acceptable drainage nor numerical specifications for the soil, for that is among the detailing of the specialists. We content ourselves with the principle that guides the decision: beware of the stagnant water as much as you beware of thirst. Whoever exceeds in the irrigation supposing that he does well may harm the roots from where he wanted their benefit if the drainage is not sufficient to drain the excess.

5. Irrigation in the dry season

In the regions that know a clear dry season, or in periods in which the rain lessens, it is circulated that the helping irrigation may aid the trees to cross the lack of the natural humidity. When the rains alone do not suffice to cover the need of the tree, the intervention of irrigation comes to fill the gap and preserve the continuation of the growth, especially in the locations in which the seasonal aridity prolongs or intensifies.

And we put this forward as a possibility to be studied, not a recipe we describe; the need of the tree for a helping irrigation in the dry season depends on the severity of the aridity and its duration, and on the age of the tree, the type of the soil, and its capacity to retain the humidity. The helping irrigation may be beneficial in one location and unnecessary in another whose rains suffice it. And we do not mention here dates nor amounts because they are among the most differing of what varies with the difference of the case, and their field estimation is the work of the people of specialization.

And the general principle that can be relied upon is that the small seedlings, as passed, are more in need of this support in the periods of aridity than the established trees more able to be patient. As for what is beyond that of details — when the helping irrigation begins, when it stops, and at what pace — its reference is the field follow-up of the state of the trees and the soil, not a general rule written in an article.

6. There is no single recipe

Perhaps the most important thing we would have the reader emerge with from this article is the conviction that there is no single irrigation recipe that suits every farm and every tree. The water need of oud trees changes with the change of many intertwined factors: the type of the soil and its capacity to retain the water and drain it, the climate and the measure of its rains, its humidity, and its heat, the age of the tree and the stage of its growth, and the followed system of irrigation itself. And any attempt to reduce this intertwining to a fixed schedule of dates and amounts would be a misleading simplification.

And for this reason specifically we refrain in this article from mentioning numbers; not because we are ignorant of them only, but because we see that publishing a numerical schedule that gives the reader the illusion that it is "the rule" may harm him more than it benefits him if he applies it to a soil or a climate that does not suit it. Honesty here requires that we say: the numbers are present with their people, and they are connected to their local context, and are not transmitted from a general article to a particular land without measurement and experience.

So whoever wants an irrigation schedule for his farm, the way to it is the agricultural specialist and the extension services that inspect his soil and his climate, not a general educational page like this. And our role is to draw the principles that guide the thinking — the balance, the drainage, the sensitivity of the seedlings, and the flexibility of the mature trees — not to issue executive orders that are not our specialization nor of the nature of our work.

7. The conclusion

We can abridge the whole talk of irrigation in two words: balance and monitoring. A balance between a sufficient humidity and a good drainage, so neither a thirst that strains nor a drowning that chokes. And a local monitoring of the state of the soil, the tree, and the season, because the water need is moving, not fixed, and is read from the land itself, not from a memorized number. The small seedling wants a continuous humidity, the mature tree is more patient, the good drainage governs both cases, and the seasonal aridity may call for a helping support — and all of that by the estimation of the people of specialization.

As for if you are a reader interested in oud as a product, not as a cultivation, the conclusion that concerns you is simpler: good oud is the fruit of a long care for the tree, of irrigation, care, and patience, then your turn comes in the goodness of choice. And for whoever wants to distinguish the authentic from other than it, we have set a practical guide in how to choose authentic Indonesian oud that helps you to choose with confidence, and better than that is that you try for yourself, so you begin with a sample of oud by which you test the scent, the origin, and the grade before you commit to a quantity.