Effect of planting and harvesting time on cassava (Manihot esculenta Crantz) Var. Gambyong

Abstract

Cassava has become a premier commodity used as the raw material for local’s food production. Gunungkidul Regency is well known as the central production of cassava, thus, becoming the main reference for the consumers either persons, group, or firms. However, Cassava’s availability has remained a problem as its productivity cannot fulfill the demand of the market. Planting and harvest time are the main problem as it remains unclear, especially for local varieties at Gunungkidul regency. This research aimed to determine the proper time to plant and harvest cassava cv. Gambyong. Factorial treatments consisting of two factors were arranged in Randomized Complete Block Design (RCBD). This first factor was the planting time (September, October, November, and December), while the second factor was the harvesting time (four, five, six, seven, eight, and nine month). There were three replications within each treatment, so that there were 72 experimental units. The result revealed that the cassava planted in September had increasing growth rate, development, and tuber yield started from 4 to 9 month of harvest time. Meanwhile, the cassava planted in October, November, and December showed decreasing growth rate, development, and tuber yield of all harvest time.

Response of Cassava Tubers Yield and its Components to Different Agricultural Treatments

“…This is to be logical since the same obtained were detected from the same harvesting time about tuber diameter and length (Tables 3 and 4). These findings are in harmony with those obtained by Lilian et al (2019) and Samidjo (2020). Here too, the presented data in the same previous table also showed that the plants grown by direct stakes and stored for 15 days differed significantly in both seasons.…”

“…These results may be because the harvest date, 9 months after planting, was later than the other harvest date (8 months) and gave a chance for cassava plants to store and transfer the photosynthesis products to tuber and enhancement cell elongation and division which led to an increase in tuber length than other tested harvesting time. These results are in harmony with those obtained by Lilian et al (2019) and Samidjo (2020). Also, the presented data in the same previous table show that the plants that were cultivated with direct and storage stakes for 15 days varied highly significantly in tuber length trait in both seasons.…”

“…This may be due to the increase in synthetic products as a result of increasing the age from 8 to 9 months, which led to the tubers storing nutrients and thus increasing the diameter of the tubers in the plant, as the age exceeded 9 months, especially with the prevention of irrigation, which led to some tubers losing their moisture, which led to a decrease in their number after that (at 10 months). Similar findings were detected by Lilian et al (2019) and Samidjo (2020).…”

“…This may be due to the increase in synthesis products as a result of the increase in age from 8 to 9 months, which led to the formation of new tubers and consequently increased the number of tubers per plant as the age exceeded 9 months, especially with the prevention of irrigation, which led to Some tubers were lost, which led to a decrease in number after that (at 10 months). These results agree with Lilian et al (2019) and Samidjo (2020). Also, the data presented in the same previous table show that the plants which were cultivated with direct and storage stakes for 15 days varied highly significantly in both seasons.…”

Study of an Epidemiological Model for Plant Virus Diseases with Periodic Coefficients

“…The baseline life cycle though is that of the cassava plant: the virus can persist in an infected plant for its entire life span, which is typically 1-3 years, depending on the variety and cultivation practices. The literature tells us that, after planting, the cassava harvest cycle is between the fourth and ninth month [40]. So, as a mean, a reference period of 200 days is chosen.…”