An Experiment to determine Regeneration of Pineapple (Ananus comosus) from its crown more efficiently in water, rich soil or sand


Pineapple was initiated in America and was unfamiliar to individuals of the ancient world prior to America discovery. It is an edible tropical pant and a good source of vitamin C and manganese. It is propagated vegetatively by suckers, slips, hapas and crowns (O’Connor, 2013). The average production of the conventional material is between four to five propagules per annum that takes significant time to produce sufficient planting material. The importation of the conventional material for direct planting by farmers is costly and may not meet the requirement of quarantine (Mauseth, 2014). The producers of pineapple are found all over the world. Nonetheless, Thailand is the main producer of pineapples. Moreover, pineapple is produced in other nations, for example, Malaysia, Brazil, Indonesia, China, and Malaysia. This experiment determines regeneration of pineapple (Ananus comosus) from its crown more efficiently in water, rich soil or sand


This experiment aims to determine the regeneration of pineapple (Ananus comosus) from its crown more efficiently in water, rich soil or sand. Many studies have suggested that pineapple can be grown from their crowns, and I intend to search further this idea. This experiment will yield information that will assist pineapple growers to produce their crops productively and efficiently. Furthermore, it will help them utilize the smallest amount of materials that are required, for example, sand, soil, and water.

Problem Statement

The cultivation of pineapple is on the increase and pineapple producers grow pineapple in different media all over the world. However, it is significant to determine the best media for growing pineapples so that its producers can obtain high yields during harvesting.

Literature Review

The pineapple (Ananas comosus) is among the Bromeliaceae family, that is, an enormous, varied family of approximately two thousand species, typically epiphytic and numerous strikingly ornamental (Lin et al., 2015). It originated in the drainage area of Parana-Paraguay River. It is a native to thorn scrub vegetation or dry forest regions of South America.

Pineapple refers to an herbaceous perennial monocotyledonous plant. It has a terminal inflorescence and fruit and incessant growth after fruit formation through the axillary buds that grows into vegetative branches with fresh apical meristem. The vegetative branches mature and produce fruits as part of the old pineapple plant. They get most of their sustenance from the old plant (Hotegni et al., 2015). Pineapple is commonly utilized in desserts and other kinds of fruit dishes. The optimum temperature range for pineapple growth is between 20-30 Celsius degrees. It requires rainfall of between 635 to 2500 mm per year for its growth and maturity.

Design of the Experiment

The experiment assumed the following to be constant:

Similar size of pot and a similar amount of soil; the quantity of light plants were exposed to; similar quantity of pineapple crowns in every group; the temperatures where the plants grew; similar milieu plants were grown in; and the same depth the pineapples are planted in. The independent variables were the kinds of growing media in every group, and the dependent variable was the pineapple’s root lengths. I would utilize a millimeter ruler to measure the length of the pineapple roots each week to measure the responding variable.

Experimental Design Steps

i. Collect the materials required, for instance, soil, fertilizer, water, pineapple crowns, camera, sand and 16 pots.

ii. Take 4 pots and put 500 ml of potting soil in them, and then label them as “Soil
1”, “Soil 2”, “Soil 3” and “Soil 4”.

iii. Perform this step with four more pots utilizing 500 ml water in place of soil, and label them appropriately.

iv. Repeat the process with potting soil and with sand; nevertheless, all the groups similarly receive seven grams of fertilizer in each pot, and label them.

v. Take photos using the camera when carrying out the experiment groups and procedures.

vi. Then put one crown into each pot six centimeters deep in the soil.

vii. Allow the crowns in the pots full of water sink to the lowermost part of their pots.

viii. Water plant groups each three days.

ix. Take observations each week utilizing millimeters to determine the roots lengths.

x. Transcribe observations in the project log making records of the date and the activity performed on that day.


The composition of media influences the quality of plants. The media for fruit crop seedling, for example, pineapple, are composed of organic matter, soil, and inorganic matter. The soil is normally utilized as a fundamental medium since it is inexpensive and readily available. Pineapples can grow in different media, for instance, rich soil, sand and water. Therefore, there is need to carry out an experiment to determine the media in which pineapples can grow much faster.

Sequence of Events

The growth of the pineapple is determined by the type of media used in this experiment.

i. All the media for regenerating pineapple from its crown are determined to have reached the same temperature utilizing the thermometer.

ii. A 500ml of potting soil were placed in four pots and labeled appropriately.

iii. A 500ml of water were placed in four pots and labeled appropriately.

iv. Repeat the same procedure with sand and potting soil having 7 grams of fertilizer in each pot.

v. Record the observations made after every one week.

v. Measure the length of each pineapple in millimeters using the ruler and record it.

Tools, Technologies and Measurement Units

The following tools, technologies and measurement units were utilized in this experiment.


The dependent variable in this experiment is pineapple growth while the independent variables are rich soil, sand and water. The controlled variables are the quantity of fertilizers used in both sand and soil and temperatures used in the experiment.

Threat reduction to internal validity

To ensure that variation in temperatures does not influence the results of the experiment, the equipment were thoroughly washed. By using accurate measurements of the pineapple crowns, the quantity of water, potting soil and sand, the experiment assures accurate results.


This experiment is based on the hypothesis that the pineapple (Ananus comosus) has the ability to grow faster and become healthier in rich soil as compared to its growth in sand and water. The hypothesis is centered on the various researches that have been carried out by researchers and scholars on the same topic.

Process of Data Collection

Data was collected each week in millimeters to measure the length of the pineapple roots. The experimenter wrote down the observations in the project log taking records of the date and the activity carried out on that day. The prediction was that pineapple could be regenerated from its crown more efficiently in rich soil than water and sand. However, it grew much faster in water than sand and soil.

Data Table: Observations made every Week in millimeters

Appropriate Methods

The pineapple growth was much faster in water than sand and rich soil; thus, indicating that weekly observation was an adequate time to measure an increase in the length of the pineapples. The growth of pineapples in rich soil and sand was fairly distinct hence showing that there should further control in the experiment. These methods are suitable for determining the growth of pineapple in different media.


Pineapple Growth Comparison in Different Media

From the above graph, pineapple grew much faster in water as compared to the other media, that is, sand and rich soil. Pineapple grew more rapidly in water after the first week. The growth of pineapple in water was much faster between second and fourth weeks. The growth of pineapple in sand was much slower in the first week, but increased between second and fourth weeks. The growth of pineapple in rich soil is faster than the growth of pineapple in sand as indicated in the above graph. This experiment was intended to determine the regeneration of pineapple (Ananus comosus) from its crown more efficiently in rich soil instead of sand and water. From the experiment, pineapple grew more efficiently in water as compared to growth in sand, in potting soil, and soil containing fertilizer. 


Confirmation of Hypothesis

As shown from the above experiment results, the hypothesis should be rejected since the pineapple had faster growth in water than in sand or rich soil. I hypothesized that the pineapples would have faster growth and become healthier in rich soil in comparison to the growth in sand and water.

Experimental Design as a Key Factor

An experimental design is useful in determining the reliability and validity of the results. The design of an experiment requires an individual to have a clear, and an objective means of measuring any effect in the experiment. An experiment should be designed to test a single independent variable.


Replicating this experiment necessitates measuring all the materials used in this experiment carefully, adding fertilizers to sand and soil with accuracy to provide better results, and conducting another experiment by placing the pineapples in a greenhouse to moisten the soil. The pineapple should be grown at a higher temperature of about 750or 850F since it would be more natural. Besides, there is a need to change experiment procedures by not taking the pineapples out of the soil or sand until the experiment is all completed.

Evaluation of Validity

Other individuals can repeat this experiment to assess the reliability and validity of the experiment. A repeat of an experiment is done to determine its validity. A repeat of an experiment that produces similar results is an indication of its validity. Continuous replication of an experiment and obtaining the same results assures its validity. Nevertheless, an experiment that cannot be constantly repeated may not be valid. Perhaps, the experimenters carried out the experiment right at the time it occurs, and there is a need to identify the variable that requires to be controlled to obtain same results.

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